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diff --git a/Misc/HISTORY b/Misc/HISTORY index 88cb286..6cadaec 100644 --- a/Misc/HISTORY +++ b/Misc/HISTORY @@ -8,6 +8,4307 @@ As you read on you go back to the dark ages of Python's history. ====================================================================== +What's New in Python 3.4.0? +=========================== + +Release date: 2014-03-16 + +Library +------- + +- Issue #20939: Fix test_geturl failure in test_urllibnet due to + new redirect of http://www.python.org/ to https://www.python.org. + +Documentation +------------- + +- Merge in all documentation changes since branching 3.4.0rc1. + + +What's New in Python 3.4.0 release candidate 3? +=============================================== + +Release date: 2014-03-09 + +Core and Builtins +----------------- + +- Issue #20786: Fix signatures for dict.__delitem__ and + property.__delete__ builtins. + +Library +------- + +- Issue #20839: Don't trigger a DeprecationWarning in the still supported + pkgutil.get_loader() API when __loader__ isn't set on a module (nor + when pkgutil.find_loader() is called directly). + +Build +----- + +- Issue #14512: Launch pydoc -b instead of pydocgui.pyw on Windows. + +- Issue #20748: Uninstalling pip does not leave behind the pyc of + the uninstaller anymore. + +- Issue #20568: The Windows installer now installs the unversioned ``pip`` + command in addition to the versioned ``pip3`` and ``pip3.4`` commands. + +- Issue #20757: The ensurepip helper for the Windows uninstaller now skips + uninstalling pip (rather than failing) if the user has updated pip to a + different version from the one bundled with ensurepip. + +- Issue #20465: Update OS X and Windows installer builds to use + SQLite 3.8.3.1. + + +What's New in Python 3.4.0 release candidate 2? +=============================================== + +Release date: 2014-02-23 + +Core and Builtins +----------------- + +- Issue #20625: Parameter names in __annotations__ were not mangled properly. + Discovered by Jonas Wielicki, patch by Yury Selivanov. + +- Issue #20261: In pickle, lookup __getnewargs__ and __getnewargs_ex__ on the + type of the object. + +- Issue #20619: Give the AST nodes of keyword-only arguments a column and line + number. + +- Issue #20526: Revert changes of issue #19466 which introduces a regression: + don't clear anymore the state of Python threads early during the Python + shutdown. + +Library +------- + +- Issue #20710: The pydoc summary line no longer displays the "self" parameter + for bound methods. + +- Issue #20566: Change asyncio.as_completed() to use a Queue, to + avoid O(N**2) behavior. + +- Issue #20704: Implement new debug API in asyncio. Add new methods + BaseEventLoop.set_debug() and BaseEventLoop.get_debug(). + Add support for setting 'asyncio.tasks._DEBUG' variable with + 'PYTHONASYNCIODEBUG' environment variable. + +- asyncio: Refactoring and fixes: BaseEventLoop.sock_connect() raises an + error if the address is not resolved; use __slots__ in Handle and + TimerHandle; as_completed() and wait() raise TypeError if the passed + list of Futures is a single Future; call_soon() and other 'call_*()' + functions raise TypeError if the passed callback is a coroutine + function; _ProactorBasePipeTransport uses _FlowControlMixin; + WriteTransport.set_write_buffer_size() calls _maybe_pause_protocol() + to consider pausing receiving if the watermark limits have changed; + fix _check_resolved_address() for IPv6 address; and other minor + improvements, along with multiple documentation updates. + +- Issue #20684: Fix inspect.getfullargspec() to not to follow __wrapped__ + chains. Make its behaviour consistent with bound methods first argument. + Patch by Nick Coghlan and Yury Selivanov. + +- Issue #20681: Add new error handling API in asyncio. New APIs: + loop.set_exception_handler(), loop.default_exception_handler(), and + loop.call_exception_handler(). + +- Issue #20673: Implement support for UNIX Domain Sockets in asyncio. + New APIs: loop.create_unix_connection(), loop.create_unix_server(), + streams.open_unix_connection(), and streams.start_unix_server(). + +- Issue #20616: Add a format() method to tracemalloc.Traceback. + +- Issue #19744: the ensurepip installation step now just prints a warning to + stderr rather than failing outright if SSL/TLS is unavailable. This allows + local installation of POSIX builds without SSL/TLS support. + +- Issue #20594: Avoid name clash with the libc function posix_close. + +Build +----- + +- Issue #20641: Run MSI custom actions (pip installation, pyc compilation) + with the NoImpersonate flag, to support elevated execution (UAC). + +- Issue #20221: Removed conflicting (or circular) hypot definition when + compiled with VS 2010 or above. Initial patch by Tabrez Mohammed. + +- Issue #20609: Restored the ability to build 64-bit Windows binaries on + 32-bit Windows, which was broken by the change in issue #19788. + + +What's New in Python 3.4.0 release candidate 1? +=============================================== + +Release date: 2014-02-10 + +Core and Builtins +----------------- + +- Issue #19255: The builtins module is restored to initial value before + cleaning other modules. The sys and builtins modules are cleaned last. + +- Issue #20588: Make Python-ast.c C89 compliant. + +- Issue #20437: Fixed 22 potential bugs when deleting object references. + +- Issue #20500: Displaying an exception at interpreter shutdown no longer + risks triggering an assertion failure in PyObject_Str. + +- Issue #20538: UTF-7 incremental decoder produced inconsistent string when + input was truncated in BASE64 section. + +- Issue #20404: io.TextIOWrapper (and hence the open() builtin) now uses the + internal codec marking system added for issue #19619 to throw LookupError + for known non-text encodings at stream construction time. The existing + output type checks remain in place to deal with unmarked third party + codecs. + +- Issue #17162: Add PyType_GetSlot. + +- Issue #20162: Fix an alignment issue in the siphash24() hash function which + caused a crash on PowerPC 64-bit (ppc64). + +Library +------- + +- Issue #20530: The signatures for slot builtins have been updated + to reflect the fact that they only accept positional-only arguments. + +- Issue #20517: Functions in the os module that accept two filenames + now register both filenames in the exception on failure. + +- Issue #20563: The ipaddress module API is now considered stable. + +- Issue #14983: email.generator now always adds a line end after each MIME + boundary marker, instead of doing so only when there is an epilogue. This + fixes an RFC compliance bug and solves an issue with signed MIME parts. + +- Issue #20540: Fix a performance regression (vs. Python 3.2) when layering + a multiprocessing Connection over a TCP socket. For small payloads, Nagle's + algorithm would introduce idle delays before the entire transmission of a + message. + +- Issue #16983: the new email header parsing code will now decode encoded words + that are (incorrectly) surrounded by quotes, and register a defect. + +- Issue #19772: email.generator no longer mutates the message object when + doing a down-transform from 8bit to 7bit CTEs. + +- Issue #20536: the statistics module now correctly handle Decimal instances + with positive exponents + +- Issue #18805: the netmask/hostmask parsing in ipaddress now more reliably + filters out illegal values and correctly allows any valid prefix length. + +- Issue #20481: For at least Python 3.4, the statistics module will require + that all inputs for a single operation be of a single consistent type, or + else a mixed of ints and a single other consistent type. This avoids + some interoperability issues that arose with the previous approach of + coercing to a suitable common type. + +- Issue #20478: the statistics module now treats collections.Counter inputs + like any other iterable. + +- Issue #17369: get_filename was raising an exception if the filename + parameter's RFC2231 encoding was broken in certain ways. This was + a regression relative to python2. + +- Issue #20013: Some imap servers disconnect if the current mailbox is + deleted, and imaplib did not handle that case gracefully. Now it + handles the 'bye' correctly. + +- Issue #20531: Revert 3.4 version of fix for #19063, and apply the 3.3 + version. That is, do *not* raise an error if unicode is passed to + email.message.Message.set_payload. + +- Issue #20476: If a non-compat32 policy is used with any of the email parsers, + EmailMessage is now used as the factory class. The factory class should + really come from the policy; that will get fixed in 3.5. + +- Issue #19920: TarFile.list() no longer fails when outputs a listing + containing non-encodable characters. Based on patch by Vajrasky Kok. + +- Issue #20515: Fix NULL pointer dereference introduced by issue #20368. + +- Issue #19186: Restore namespacing of expat symbols inside the pyexpat module. + +- Issue #20053: ensurepip (and hence venv) are no longer affected by the + settings in the default pip configuration file. + +- Issue #20426: When passing the re.DEBUG flag, re.compile() displays the + debug output every time it is called, regardless of the compilation cache. + +- Issue #20368: The null character now correctly passed from Tcl to Python. + Improved error handling in variables-related commands. + +- Issue #20435: Fix _pyio.StringIO.getvalue() to take into account newline + translation settings. + +- tracemalloc: Fix slicing traces and fix slicing a traceback. + +- Issue #20354: Fix an alignment issue in the tracemalloc module on 64-bit + platforms. Bug seen on 64-bit Linux when using "make profile-opt". + +- Issue #17159: inspect.signature now accepts duck types of functions, + which adds support for Cython functions. Initial patch by Stefan Behnel. + +- Issue #18801: Fix inspect.classify_class_attrs to correctly classify + object.__new__ and object.__init__. + +- Fixed cmath.isinf's name in its argument parsing code. + +- Issue #20311, #20452: poll and epoll now round the timeout away from zero, + instead of rounding towards zero, in select and selectors modules: + select.epoll.poll(), selectors.PollSelector.poll() and + selectors.EpollSelector.poll(). For example, a timeout of one microsecond + (1e-6) is now rounded to one millisecondi (1e-3), instead of being rounded to + zero. However, the granularity property and asyncio's resolution feature + were removed again. + +- asyncio: Some refactoring; various fixes; add write flow control to + unix pipes; Future.set_exception() instantiates the exception + argument if it is a class; improved proactor pipe transport; support + wait_for(f, None); don't log broken/disconnected pipes; use + ValueError instead of assert for forbidden subprocess_{shell,exec} + arguments; added a convenience API for subprocess management; added + StreamReader.at_eof(); properly handle duplicate coroutines/futures + in gather(), wait(), as_completed(); use a bytearray for buffering + in StreamReader; and more. + +- Issue #20288: fix handling of invalid numeric charrefs in HTMLParser. + +- Issue #20424: Python implementation of io.StringIO now supports lone surrogates. + +- Issue #20308: inspect.signature now works on classes without user-defined + __init__ or __new__ methods. + +- Issue #20372: inspect.getfile (and a bunch of other inspect functions that + use it) doesn't crash with unexpected AttributeError on classes defined in C + without __module__. + +- Issue #20356: inspect.signature formatting uses '/' to separate + positional-only parameters from others. + +- Issue #20223: inspect.signature now supports methods defined with + functools.partialmethods. + +- Issue #19456: ntpath.join() now joins relative paths correctly when a drive + is present. + +- Issue #19077: tempfile.TemporaryDirectory cleanup no longer fails when + called during shutdown. Emitting resource warning in __del__ no longer fails. + Original patch by Antoine Pitrou. + +- Issue #20394: Silence Coverity warning in audioop module. + +- Issue #20367: Fix behavior of concurrent.futures.as_completed() for + duplicate arguments. Patch by Glenn Langford. + +- Issue #8260: The read(), readline() and readlines() methods of + codecs.StreamReader returned incomplete data when were called after + readline() or read(size). Based on patch by Amaury Forgeot d'Arc. + +- Issue #20105: the codec exception chaining now correctly sets the + traceback of the original exception as its __traceback__ attribute. + +- Issue #17481: inspect.getfullargspec() now uses inspect.signature() API. + +- Issue #15304: concurrent.futures.wait() can block forever even if + Futures have completed. Patch by Glenn Langford. + +- Issue #14455: plistlib: fix serializing integers in the range + of an unsigned long long but outside of the range of signed long long for + binary plist files. + +IDLE +---- + +- Issue #20406: Use Python application icons for Idle window title bars. + Patch mostly by Serhiy Storchaka. + +- Update the python.gif icon for the Idle classbrowser and pathbowser + from the old green snake to the new blue and yellow snakes. + +- Issue #17721: Remove non-functional configuration dialog help button until we + make it actually gives some help when clicked. Patch by Guilherme Simões. + +Tests +----- + +- Issue #20532: Tests which use _testcapi now are marked as CPython only. + +- Issue #19920: Added tests for TarFile.list(). Based on patch by Vajrasky Kok. + +- Issue #19990: Added tests for the imghdr module. Based on patch by + Claudiu Popa. + +- Issue #20474: Fix test_socket "unexpected success" failures on OS X 10.7+. + +Tools/Demos +----------- + +- Issue #20530: Argument Clinic's signature format has been revised again. + The new syntax is highly human readable while still preventing false + positives. The syntax also extends Python syntax to denote "self" and + positional-only parameters, allowing inspect.Signature objects to be + totally accurate for all supported builtins in Python 3.4. + +- Issue #20456: Argument Clinic now observes the C preprocessor conditional + compilation statements of the C files it parses. When a Clinic block is + inside a conditional code, it adjusts its output to match, including + automatically generating an empty methoddef macro. + +- Issue #20456: Cloned functions in Argument Clinic now use the correct + name, not the name of the function they were cloned from, for text + strings inside generated code. + +- Issue #20456: Fixed Argument Clinic's test suite and "--converters" feature. + +- Issue #20456: Argument Clinic now allows specifying different names + for a parameter in Python and C, using "as" on the parameter line. + +- Issue #20326: Argument Clinic now uses a simple, unique signature to + annotate text signatures in docstrings, resulting in fewer false + positives. "self" parameters are also explicitly marked, allowing + inspect.Signature() to authoritatively detect (and skip) said parameters. + +- Issue #20326: Argument Clinic now generates separate checksums for the + input and output sections of the block, allowing external tools to verify + that the input has not changed (and thus the output is not out-of-date). + +Build +----- + +- Issue #20465: Update SQLite shipped with OS X installer to 3.8.3. + +C-API +----- + +- Issue #20517: Added new functions allowing OSError exceptions to reference + two filenames instead of one: PyErr_SetFromErrnoWithFilenameObjects() and + PyErr_SetExcFromWindowsErrWithFilenameObjects(). + +Documentation +------------- + +- Issue #20488: Change wording to say importlib is *the* implementation of + import instead of just *an* implementation. + +- Issue #6386: Clarify in the tutorial that specifying a symlink to execute + means the directory containing the executed script and not the symlink is + added to sys.path. + + +What's New in Python 3.4.0 Beta 3? +================================== + +Release date: 2014-01-26 + +Core and Builtins +----------------- + +- Issue #20189: Four additional builtin types (PyTypeObject, + PyMethodDescr_Type, _PyMethodWrapper_Type, and PyWrapperDescr_Type) + have been modified to provide introspection information for builtins. + +- Issue #17825: Cursor "^" is correctly positioned for SyntaxError and + IndentationError. + +- Issue #2382: SyntaxError cursor "^" is now written at correct position in most + cases when multibyte characters are in line (before "^"). This still not + works correctly with wide East Asian characters. + +- Issue #18960: The first line of Python script could be executed twice when + the source encoding was specified on the second line. Now the source encoding + declaration on the second line isn't effective if the first line contains + anything except a comment. 'python -x' works now again with files with the + source encoding declarations, and can be used to make Python batch files + on Windows. + +Library +------- + +- asyncio: Various improvements and small changes not all covered by + issues listed below. E.g. wait_for() now cancels the inner task if + the timeout occcurs; tweaked the set of exported symbols; renamed + Empty/Full to QueueEmpty/QueueFull; "with (yield from lock)" now + uses a separate context manager; readexactly() raises if not enough + data was read; PTY support tweaks. + +- Issue #20311: asyncio: Add a granularity attribute to BaseEventLoop: maximum + between the resolution of the BaseEventLoop.time() method and the resolution + of the selector. The granuarility is used in the scheduler to round time and + deadline. + +- Issue #20311: selectors: Add a resolution attribute to BaseSelector. + +- Issue #20189: unittest.mock now no longer assumes that any object for + which it could get an inspect.Signature is a callable written in Python. + Fix courtesy of Michael Foord. + +- Issue #20317: ExitStack.__exit__ could create a self-referential loop if an + exception raised by a cleanup operation already had its context set + correctly (for example, by the @contextmanager decorator). The infinite + loop this caused is now avoided by checking if the expected context is + already set before trying to fix it. + +- Issue #20374: Fix build with GNU readline >= 6.3. + +- Issue #20262: Warnings are raised now when duplicate names are added in the + ZIP file or too long ZIP file comment is truncated. + +- Issue #20165: The unittest module no longer considers tests marked with + @expectedFailure successful if they pass. + +- Issue #18574: Added missing newline in 100-Continue reply from + http.server.BaseHTTPRequestHandler. Patch by Nikolaus Rath. + +- Issue #20270: urllib.urlparse now supports empty ports. + +- Issue #20243: TarFile no longer raise ReadError when opened in write mode. + +- Issue #20238: TarFile opened with external fileobj and "w:gz" mode didn't + write complete output on close. + +- Issue #20245: The open functions in the tarfile module now correctly handle + empty mode. + +- Issue #20242: Fixed basicConfig() format strings for the alternative + formatting styles. Thanks to kespindler for the bug report and patch. + +- Issue #20246: Fix buffer overflow in socket.recvfrom_into. + +- Issues #20206 and #5803: Fix edge case in email.quoprimime.encode where it + truncated lines ending in a character needing encoding but no newline by + using a more efficient algorithm that doesn't have the bug. + +- Issue #19082: Working xmlrpc.server and xmlrpc.client examples. Both in + modules and in documentation. Initial patch contributed by Vajrasky Kok. + +- Issue #20138: The wsgiref.application_uri() and wsgiref.request_uri() + functions now conform to PEP 3333 when handle non-ASCII URLs. + +- Issue #19097: Raise the correct Exception when cgi.FieldStorage is given an + invalid fileobj. + +- Issue #20152: Ported Python/import.c over to Argument Clinic. + +- Issue #13107: argparse and optparse no longer raises an exception when output + a help on environment with too small COLUMNS. Based on patch by + Elazar Gershuni. + +- Issue #20207: Always disable SSLv2 except when PROTOCOL_SSLv2 is explicitly + asked for. + +- Issue #18960: The tokenize module now ignore the source encoding declaration + on the second line if the first line contains anything except a comment. + +- Issue #20078: Reading malformed zipfiles no longer hangs with 100% CPU + consumption. + +- Issue #20113: os.readv() and os.writev() now raise an OSError exception on + error instead of returning -1. + +- Issue #19719: Make importlib.abc.MetaPathFinder.find_module(), + PathEntryFinder.find_loader(), and Loader.load_module() use PEP 451 APIs to + help with backwards-compatibility. + +- Issue #20144: inspect.Signature now supports parsing simple symbolic + constants as parameter default values in __text_signature__. + +- Issue #20072: Fixed multiple errors in tkinter with wantobjects is False. + +- Issue #20229: Avoid plistlib deprecation warning in platform.mac_ver(). + +- Issue #14455: Fix some problems with the new binary plist support in plistlib. + +IDLE +---- + +- Issue #17390: Add Python version to Idle editor window title bar. + Original patches by Edmond Burnett and Kent Johnson. + +- Issue #18960: IDLE now ignores the source encoding declaration on the second + line if the first line contains anything except a comment. + +Tests +----- + +- Issue #20358: Tests for curses.window.overlay and curses.window.overwrite + no longer specify min{row,col} > max{row,col}. + +- Issue #19804: The test_find_mac test in test_uuid is now skipped if the + ifconfig executable is not available. + +- Issue #19886: Use better estimated memory requirements for bigmem tests. + +Tools/Demos +----------- + +- Issue #20390: Argument Clinic's "file" output preset now defaults to + "{dirname}/clinic/{basename}.h". + +- Issue #20390: Argument Clinic's "class" directive syntax has been extended + with two new required arguments: "typedef" and "type_object". + +- Issue #20390: Argument Clinic: If __new__ or __init__ functions didn't use + kwargs (or args), the PyArg_NoKeywords (or PyArg_NoPositional) calls + generated are only run when the type object is an exact match. + +- Issue #20390: Argument Clinic now fails if you have required parameters after + optional parameters. + +- Issue #20390: Argument Clinic converters now have a new template they can + inject code into: "modifiers". Code put there is run in the parsing + function after argument parsing but before the call to the impl. + +- Issue #20376: Argument Clinic now escapes backslashes in docstrings. + +- Issue #20381: Argument Clinic now sanity checks the default argument when + c_default is also specified, providing a nice failure message for + disallowed values. + +- Issue #20189: Argument Clinic now ensures that parser functions for + __new__ are always of type newfunc, the type of the tp_new slot. + Similarly, parser functions for __init__ are now always of type initproc, + the type of tp_init. + +- Issue #20189: Argument Clinic now suppresses the docstring for __new__ + and __init__ functions if no docstring is provided in the input. + +- Issue #20189: Argument Clinic now suppresses the "self" parameter in the + impl for @staticmethod functions. + +- Issue #20294: Argument Clinic now supports argument parsing for __new__ and + __init__ functions. + +- Issue #20299: Argument Clinic custom converters may now change the default + value of c_default and py_default with a class member. + +- Issue #20287: Argument Clinic's output is now configurable, allowing + delaying its output or even redirecting it to a separate file. + +- Issue #20226: Argument Clinic now permits simple expressions + (e.g. "sys.maxsize - 1") as default values for parameters. + +- Issue #19936: Added executable bits or shebang lines to Python scripts which + requires them. Disable executable bits and shebang lines in test and + benchmark files in order to prevent using a random system python, and in + source files of modules which don't provide command line interface. Fixed + shebang lines in the unittestgui and checkpip scripts. + +- Issue #20268: Argument Clinic now supports cloning the parameters and + return converter of existing functions. + +- Issue #20228: Argument Clinic now has special support for class special + methods. + +- Issue #20214: Fixed a number of small issues and documentation errors in + Argument Clinic (see issue for details). + +- Issue #20196: Fixed a bug where Argument Clinic did not generate correct + parsing code for functions with positional-only parameters where all arguments + are optional. + +- Issue #18960: 2to3 and the findnocoding.py script now ignore the source + encoding declaration on the second line if the first line contains anything + except a comment. + +- Issue #19723: The marker comments Argument Clinic uses have been changed + to improve readability. + +- Issue #20157: When Argument Clinic renames a parameter because its name + collides with a C keyword, it no longer exposes that rename to PyArg_Parse. + +- Issue #20141: Improved Argument Clinic's support for the PyArg_Parse "O!" + format unit. + +- Issue #20144: Argument Clinic now supports simple symbolic constants + as parameter default values. + +- Issue #20143: The line numbers reported in Argument Clinic errors are + now more accurate. + +- Issue #20142: Py_buffer variables generated by Argument Clinic are now + initialized with a default value. + +Build +----- + +- Issue #12837: Silence a tautological comparison warning on OS X under Clang in + socketmodule.c. + + +What's New in Python 3.4.0 Beta 2? +================================== + +Release date: 2014-01-05 + +Core and Builtins +----------------- + +- Issue #17432: Drop UCS2 from names of Unicode functions in python3.def. + +- Issue #19526: Exclude all new API from the stable ABI. Exceptions can be + made if a need is demonstrated. + +- Issue #19969: PyBytes_FromFormatV() now raises an OverflowError if "%c" + argument is not in range [0; 255]. + +- Issue #19995: %c, %o, %x, and %X now issue a DeprecationWarning on non-integer + input; reworded docs to clarify that an integer type should define both __int__ + and __index__. + +- Issue #19787: PyThread_set_key_value() now always set the value. In Python + 3.3, the function did nothing if the key already exists (if the current value + is a non-NULL pointer). + +- Issue #14432: Remove the thread state field from the frame structure. Fix a + crash when a generator is created in a C thread that is destroyed while the + generator is still used. The issue was that a generator contains a frame, and + the frame kept a reference to the Python state of the destroyed C thread. The + crash occurs when a trace function is setup. + +- Issue #19576: PyGILState_Ensure() now initializes threads. At startup, Python + has no concrete GIL. If PyGILState_Ensure() is called from a new thread for + the first time and PyEval_InitThreads() was not called yet, a GIL needs to be + created. + +- Issue #17576: Deprecation warning emitted now when __int__() or __index__() + return not int instance. + +- Issue #19932: Fix typo in import.h, missing whitespaces in function prototypes. + +- Issue #19736: Add module-level statvfs constants defined for GNU/glibc + based systems. + +- Issue #20097: Fix bad use of "self" in importlib's WindowsRegistryFinder. + +- Issue #19729: In str.format(), fix recursive expansion in format spec. + +- Issue #19638: Fix possible crash / undefined behaviour from huge (more than 2 + billion characters) input strings in _Py_dg_strtod. + +Library +------- + +- Issue #20154: Deadlock in asyncio.StreamReader.readexactly(). + +- Issue #16113: Remove sha3 module again. + +- Issue #20111: pathlib.Path.with_suffix() now sanity checks the given suffix. + +- Fix breakage in TestSuite.countTestCases() introduced by issue #11798. + +- Issue #20108: Avoid parameter name clash in inspect.getcallargs(). + +- Issue #19918: Fix PurePath.relative_to() under Windows. + +- Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl + module, rather than silently let them emit clear text data. + +- Issue #20046: Locale alias table no longer contains entities which can be + calculated. Generalized support of the euro modifier. + +- Issue #20027: Fixed locale aliases for devanagari locales. + +- Issue #20067: Tkinter variables now work when wantobjects is false. + +- Issue #19020: Tkinter now uses splitlist() instead of split() in configure + methods. + +- Issue #19744: ensurepip now provides a better error message when Python is + built without SSL/TLS support (pip currently requires that support to run, + even if only operating with local wheel files) + +- Issue #19734: ensurepip now ignores all pip environment variables to avoid + odd behaviour based on user configuration settings + +- Fix TypeError on "setup.py upload --show-response". + +- Issue #20045: Fix "setup.py register --list-classifiers". + +- Issue #18879: When a method is looked up on a temporary file, avoid closing + the file before the method is possibly called. + +- Issue #20037: Avoid crashes when opening a text file late at interpreter + shutdown. + +- Issue #19967: Thanks to the PEP 442, asyncio.Future now uses a + destructor to log uncaught exceptions, instead of the dedicated + _TracebackLogger class. + +- Added a Task.current_task() class method to asyncio. + +- Issue #19850: Set SA_RESTART in asyncio when registering a signal + handler to limit EINTR occurrences. + +- Implemented write flow control in asyncio for proactor event loop (Windows). + +- Change write buffer in asyncio use to avoid O(N**2) behavior. Make + write()/sendto() accept bytearray/memoryview. + +- Issue #20034: Updated alias mapping to most recent locale.alias file + from X.org distribution using makelocalealias.py. + +- Issue #5815: Fixed support for locales with modifiers. Fixed support for + locale encodings with hyphens. + +- Issue #20026: Fix the sqlite module to handle correctly invalid isolation + level (wrong type). + +- Issue #18829: csv.Dialect() now checks type for delimiter, escapechar and + quotechar fields. Original patch by Vajrasky Kok. + +- Issue #19855: uuid.getnode() on Unix now looks on the PATH for the + executables used to find the mac address, with /sbin and /usr/sbin as + fallbacks. + +- Issue #20007: HTTPResponse.read(0) no more prematurely closes connection. + Original patch by Simon Sapin. + +- Issue #19946: multiprocessing now uses runpy to initialize __main__ in + child processes when necessary, allowing it to correctly handle scripts + without suffixes and submodules that use explicit relative imports or + otherwise rely on parent modules being correctly imported prior to + execution. + +- Issue #19921: When Path.mkdir() is called with parents=True, any missing + parent is created with the default permissions, ignoring the mode argument + (mimicking the POSIX "mkdir -p" command). + +- Issue #19887: Improve the Path.resolve() algorithm to support certain + symlink chains. + +- Issue #19912: Fixed numerous bugs in ntpath.splitunc(). + +- Issue #19911: ntpath.splitdrive() now correctly processes the 'İ' character + (U+0130, LATIN CAPITAL LETTER I WITH DOT ABOVE). + +- Issue #19532: python -m compileall with no filename/directory arguments now + respects the -f and -q flags instead of ignoring them. + +- Issue #19623: Fixed writing to unseekable files in the aifc module. + +- Issue #19946: multiprocessing.spawn now raises ImportError when the module to + be used as the main module cannot be imported. + +- Issue #17919: select.poll.register() again works with poll.POLLNVAL on AIX. + Fixed integer overflow in the eventmask parameter. + +- Issue #19063: if a Charset's body_encoding was set to None, the email + package would generate a message claiming the Content-Transfer-Encoding + was 7bit, and produce garbage output for the content. This now works. + A couple of other set_payload mishandlings of non-ASCII are also fixed. + In addition, calling set_payload with a string argument without + specifying a charset now raises an error (this is a new error in 3.4). + +- Issue #15475: Add __sizeof__ implementations for itertools objects. + +- Issue #19944: Fix importlib.find_spec() so it imports parents as needed + and move the function to importlib.util. + +- Issue #19880: Fix a reference leak in unittest.TestCase. Explicitly break + reference cycles between frames and the _Outcome instance. + +- Issue #17429: platform.linux_distribution() now decodes files from the UTF-8 + encoding with the surrogateescape error handler, instead of decoding from the + locale encoding in strict mode. It fixes the function on Fedora 19 which is + probably the first major distribution release with a non-ASCII name. Patch + written by Toshio Kuratomi. + +- Issue #19343: Expose FreeBSD-specific APIs in resource module. Original + patch by Koobs. + +- Issue #19929: Call os.read with 32768 within subprocess.Popen.communicate + rather than 4096 for efficiency. A microbenchmark shows Linux and OS X + both using ~50% less cpu time this way. + +- Issue #19506: Use a memoryview to avoid a data copy when piping data + to stdin within subprocess.Popen.communicate. 5-10% less cpu usage. + +- Issue #19876: selectors unregister() no longer raises ValueError or OSError + if the FD is closed (as long as it was registered). + +- Issue #19908: pathlib now joins relative Windows paths correctly when a drive + is present. Original patch by Antoine Pitrou. + +- Issue #19296: Silence compiler warning in dbm_open + +- Issue #6784: Strings from Python 2 can now be unpickled as bytes + objects by setting the encoding argument of Unpickler to be 'bytes'. + Initial patch by Merlijn van Deen. + +- Issue #19839: Fix regression in bz2 module's handling of non-bzip2 data at + EOF, and analogous bug in lzma module. + +- Issue #19881: Fix pickling bug where cpickle would emit bad pickle data for + large bytes string (i.e., with size greater than 2**32-1). + +- Issue #19138: doctest's IGNORE_EXCEPTION_DETAIL now allows a match when + no exception detail exists (no colon following the exception's name, or + a colon does follow but no text follows the colon). + +- Issue #19927: Add __eq__ to path-based loaders in importlib. + +- Issue #19827: On UNIX, setblocking() and settimeout() methods of + socket.socket can now avoid a second syscall if the ioctl() function can be + used, or if the non-blocking flag of the socket is unchanged. + +- Issue #19785: smtplib now supports SSLContext.check_hostname and server name + indication for TLS/SSL connections. + +- Issue #19784: poplib now supports SSLContext.check_hostname and server name + indication for TLS/SSL connections. + +- Issue #19783: nntplib now supports SSLContext.check_hostname and server name + indication for TLS/SSL connections. + +- Issue #19782: imaplib now supports SSLContext.check_hostname and server name + indication for TLS/SSL connections. + +- Issue #20123: Fix pydoc.synopsis() for "binary" modules. + +- Issue #19834: Support unpickling of exceptions pickled by Python 2. + +- Issue #19781: ftplib now supports SSLContext.check_hostname and server name + indication for TLS/SSL connections. + +- Issue #19509: Add SSLContext.check_hostname to match the peer's certificate + with server_hostname on handshake. + +- Issue #15798: Fixed subprocess.Popen() to no longer fail if file + descriptor 0, 1 or 2 is closed. + +- Issue #17897: Optimized unpickle prefetching. + +- Issue #3693: Make the error message more helpful when the array.array() + constructor is given a str. Move the array module typecode documentation to + the docstring of the constructor. + +- Issue #19088: Fixed incorrect caching of the copyreg module in + object.__reduce__() and object.__reduce_ex__(). + +- Issue #19698: Removed exec_module() methods from + importlib.machinery.BuiltinImporter and ExtensionFileLoader. + +- Issue #18864: Added a setter for ModuleSpec.has_location. + +- Fixed _pickle.Unpickler to not fail when loading empty strings as + persistent IDs. + +- Issue #11480: Fixed copy.copy to work with classes with custom metaclasses. + Patch by Daniel Urban. + +- Issue #6477: Added support for pickling the types of built-in singletons + (i.e., Ellipsis, NotImplemented, None). + +- Issue #19713: Add remaining PEP 451-related deprecations and move away + from using find_module/find_loaer/load_module. + +- Issue #19708: Update pkgutil to use the new importer APIs. + +- Issue #19703: Update pydoc to use the new importer APIs. + +- Issue #19851: Fixed a regression in reloading sub-modules. + +- ssl.create_default_context() sets OP_NO_COMPRESSION to prevent CRIME. + +- Issue #19802: Add socket.SO_PRIORITY. + +- Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with + virtual interface. Original patch by Kent Frazier. + +- Issue #11489: JSON decoder now accepts lone surrogates. + +- Issue #19545: Avoid chained exceptions while passing stray % to + time.strptime(). Initial patch by Claudiu Popa. + +IDLE +---- + +- Issue #20058: sys.stdin.readline() in IDLE now always returns only one line. + +- Issue #19481: print() of string subclass instance in IDLE no longer hangs. + +- Issue #18270: Prevent possible IDLE AttributeError on OS X when no initial + shell window is present. + +Tests +----- + +- Issue #20055: Fix test_shutil under Windows with symlink privileges held. + Patch by Vajrasky Kok. + +- Issue #20070: Don't run test_urllib2net when network resources are not + enabled. + +- Issue #19938: Re-enabled test_bug_1333982 in test_dis, which had been + disabled since 3.0 due to the changes in listcomp handling. + +- Issue #19320: test_tcl no longer fails when wantobjects is false. + +- Issue #19919: Fix flaky SSL test. connect_ex() sometimes returns + EWOULDBLOCK on Windows or VMs hosted on Windows. + +- Issue #19912: Added tests for ntpath.splitunc(). + +- Issue #19828: Fixed test_site when the whole suite is run with -S. + +- Issue #19928: Implemented a test for repr() of cell objects. + +- Issue #19535: Fixed test_docxmlrpc, test_functools, test_inspect, and + test_statistics when python is run with -OO. + +- Issue #19926: Removed unneeded test_main from test_abstract_numbers. + Patch by Vajrasky Kok. + +- Issue #19572: More skipped tests explicitly marked as skipped. + +- Issue #19595, #19987: Re-enabled a long-disabled test in test_winsound. + +- Issue #19588: Fixed tests in test_random that were silently skipped most + of the time. Patch by Julian Gindi. + +Build +----- + +- Issue #19728: Enable pip installation by default on Windows. + +- Issue #16136: Remove VMS support + +- Issue #18215: Add script Tools/ssl/test_multiple_versions.py to compile and + run Python's unit tests with multiple versions of OpenSSL. + +- Issue #19922: define _INCLUDE__STDC_A1_SOURCE in HP-UX to include mbstate_t + for mbrtowc(). + +- Issue #19788: kill_python(_d).exe is now run as a PreBuildEvent on the + pythoncore sub-project. This should prevent build errors due a previous + build's python(_d).exe still running. + +Documentation +------------- + +- Issue #20265: Updated some parts of the Using Windows document. + +- Issue #20266: Updated some parts of the Windows FAQ. + +- Issue #20255: Updated the about and bugs pages. + +- Issue #20253: Fixed a typo in the ipaddress docs that advertised an + illegal attribute name. Found by INADA Naoki. + +- Issue #18840: Introduce the json module in the tutorial, and de-emphasize + the pickle module. + +- Issue #19845: Updated the Compiling Python on Windows section. + +- Issue #19795: Improved markup of True/False constants. + +Tools/Demos +----------- + +- Issue #19659: Added documentation for Argument Clinic. + +- Issue #19976: Argument Clinic METH_NOARGS functions now always + take two parameters. + + +What's New in Python 3.4.0 Beta 1? +================================== + +Release date: 2013-11-24 + +Core and Builtins +----------------- + +- Use the repr of a module name in more places in import, especially + exceptions. + +- Issue #19619: str.encode, bytes.decode and bytearray.decode now use an + internal API to throw LookupError for known non-text encodings, rather + than attempting the encoding or decoding operation and then throwing a + TypeError for an unexpected output type. (The latter mechanism remains + in place for third party non-text encodings) + +- Issue #19183: Implement PEP 456 'secure and interchangeable hash algorithm'. + Python now uses SipHash24 on all major platforms. + +- Issue #12892: The utf-16* and utf-32* encoders no longer allow surrogate code + points (U+D800-U+DFFF) to be encoded. The utf-32* decoders no longer decode + byte sequences that correspond to surrogate code points. The surrogatepass + error handler now works with the utf-16* and utf-32* codecs. Based on + patches by Victor Stinner and Kang-Hao (Kenny) Lu. + +- Issue #17806: Added keyword-argument support for "tabsize" to + str/bytes.expandtabs(). + +- Issue #17828: Output type errors in str.encode(), bytes.decode() and + bytearray.decode() now direct users to codecs.encode() or codecs.decode() + as appropriate. + +- Issue #17828: The interpreter now attempts to chain errors that occur in + codec processing with a replacement exception of the same type that + includes the codec name in the error message. It ensures it only does this + when the creation of the replacement exception won't lose any information. + +- Issue #19466: Clear the frames of daemon threads earlier during the + Python shutdown to call object destructors. So "unclosed file" resource + warnings are now correctly emitted for daemon threads. + +- Issue #19514: Deduplicate some _Py_IDENTIFIER declarations. + Patch by Andrei Dorian Duma. + +- Issue #17936: Fix O(n**2) behaviour when adding or removing many subclasses + of a given type. + +- Issue #19428: zipimport now handles errors when reading truncated or invalid + ZIP archive. + +- Issue #18408: Add a new PyFrame_FastToLocalsWithError() function to handle + exceptions when merging fast locals into f_locals of a frame. + PyEval_GetLocals() now raises an exception and return NULL on failure. + +- Issue #19369: Optimized the usage of __length_hint__(). + +- Issue #28026: Raise ImportError when exec_module() exists but + create_module() is missing. + +- Issue #18603: Ensure that PyOS_mystricmp and PyOS_mystrnicmp are in the + Python executable and not removed by the linker's optimizer. + +- Issue #19306: Add extra hints to the faulthandler module's stack + dumps that these are "upside down". + +Library +------- + +- Issue #3158: doctest can now find doctests in functions and methods + written in C. + +- Issue #13477: Added command line interface to the tarfile module. + Original patch by Berker Peksag. + +- Issue #19674: inspect.signature() now produces a correct signature + for some builtins. + +- Issue #19722: Added opcode.stack_effect(), which + computes the stack effect of bytecode instructions. + +- Issue #19735: Implement private function ssl._create_stdlib_context() to + create SSLContext objects in Python's stdlib module. It provides a single + configuration point and makes use of SSLContext.load_default_certs(). + +- Issue #16203: Add re.fullmatch() function and regex.fullmatch() method, + which anchor the pattern at both ends of the string to match. + Original patch by Matthew Barnett. + +- Issue #13592: Improved the repr for regular expression pattern objects. + Based on patch by Hugo Lopes Tavares. + +- Issue #19641: Added the audioop.byteswap() function to convert big-endian + samples to little-endian and vice versa. + +- Issue #15204: Deprecated the 'U' mode in file-like objects. + +- Issue #17810: Implement PEP 3154, pickle protocol 4. + +- Issue #19668: Added support for the cp1125 encoding. + +- Issue #19689: Add ssl.create_default_context() factory function. It creates + a new SSLContext object with secure default settings. + +- Issue #19727: os.utime(..., None) is now potentially more precise + under Windows. + +- Issue #17201: ZIP64 extensions now are enabled by default. Patch by + William Mallard. + +- Issue #19292: Add SSLContext.load_default_certs() to load default root CA + certificates from default stores or system stores. By default the method + loads CA certs for authentication of server certs. + +- Issue #19673: Add pathlib to the stdlib as a provisional module (PEP 428). + +- Issue #16596: pdb in a generator now properly skips over yield and + yield from rather than stepping out of the generator into its + caller. (This is essential for stepping through asyncio coroutines.) + +- Issue #17916: Added dis.Bytecode.from_traceback() and + dis.Bytecode.current_offset to easily display "current instruction" + markers in the new disassembly API (Patch by Claudiu Popa). + +- Issue #19552: venv now supports bootstrapping pip into virtual environments + +- Issue #17134: Finalize interface to Windows' certificate store. Cert and + CRL enumeration are now two functions. enum_certificates() also returns + purpose flags as set of OIDs. + +- Issue #19555: Restore sysconfig.get_config_var('SO'), (and the distutils + equivalent) with a DeprecationWarning pointing people at $EXT_SUFFIX. + +- Issue #8813: Add SSLContext.verify_flags to change the verification flags + of the context in order to enable certification revocation list (CRL) + checks or strict X509 rules. + +- Issue #18294: Fix the zlib module to make it 64-bit safe. + +- Issue #19682: Fix compatibility issue with old version of OpenSSL that + was introduced by Issue #18379. + +- Issue #14455: plistlib now supports binary plists and has an updated API. + +- Issue #19633: Fixed writing not compressed 16- and 32-bit wave files on + big-endian platforms. + +- Issue #18379: SSLSocket.getpeercert() returns CA issuer AIA fields, OCSP + and CRL distribution points. + +- Issue #18138: Implement cadata argument of SSLContext.load_verify_location() + to load CA certificates and CRL from memory. It supports PEM and DER + encoded strings. + +- Issue #18775: Add name and block_size attribute to HMAC object. They now + provide the same API elements as non-keyed cryptographic hash functions. + +- Issue #17276: MD5 as default digestmod for HMAC is deprecated. The HMAC + module supports digestmod names, e.g. hmac.HMAC('sha1'). + +- Issue #19449: in csv's writerow, handle non-string keys when generating the + error message that certain keys are not in the 'fieldnames' list. + +- Issue #13633: Added a new convert_charrefs keyword arg to HTMLParser that, + when True, automatically converts all character references. + +- Issue #2927: Added the unescape() function to the html module. + +- Issue #8402: Added the escape() function to the glob module. + +- Issue #17618: Add Base85 and Ascii85 encoding/decoding to the base64 module. + +- Issue #19634: time.strftime("%y") now raises a ValueError on AIX when given a + year before 1900. + +- Fix test.support.bind_port() to not cause an error when Python was compiled + on a system with SO_REUSEPORT defined in the headers but run on a system + with an OS kernel that does not support that reasonably new socket option. + +- Fix compilation error under gcc of the ctypes module bundled libffi for arm. + +- Issue #19448: Add private API to SSL module to lookup ASN.1 objects by OID, + NID, short name and long name. + +- Issue #19282: dbm.open now supports the context management protocol. + (Initial patch by Claudiu Popa) + +- Issue #8311: Added support for writing any bytes-like objects in the aifc, + sunau, and wave modules. + +- Issue #5202: Added support for unseekable files in the wave module. + +- Issue #19544 and Issue #1180: Restore global option to ignore + ~/.pydistutils.cfg in Distutils, accidentally removed in backout of + distutils2 changes. + +- Issue #19523: Closed FileHandler leak which occurred when delay was set. + +- Issue #19544 and Issue #6516: Restore support for --user and --group + parameters to sdist command accidentally rolled back as part of the + distutils2 rollback. + +- Issue #13674: Prevented time.strftime from crashing on Windows when given + a year before 1900 and a format of %y. + +- Issue #19406: implementation of the ensurepip module (part of PEP 453). + Patch by Donald Stufft and Nick Coghlan. + +- Issue #19544 and Issue #6286: Restore use of urllib over http allowing use + of http_proxy for Distutils upload command, a feature accidentally lost + in the rollback of distutils2. + +- Issue #19544 and Issue #7457: Restore the read_pkg_file method to + distutils.dist.DistributionMetadata accidentally removed in the undo of + distutils2. + +- Issue #16685: Added support for any bytes-like objects in the audioop module. + Removed support for strings. + +- Issue #7171: Add Windows implementation of ``inet_ntop`` and ``inet_pton`` + to socket module. Patch by Atsuo Ishimoto. + +- Issue #19261: Added support for writing 24-bit samples in the sunau module. + +- Issue #1097797: Added CP273 encoding, used on IBM mainframes in + Germany and Austria. Mapping provided by Michael Bierenfeld. + +- Issue #1575020: Fixed support of 24-bit wave files on big-endian platforms. + +- Issue #19378: Fixed a number of cases in the dis module where the new + "file" parameter was not being honoured correctly + +- Issue #19378: Removed the "dis.Bytecode.show_info" method + +- Issue #19378: Renamed the "dis.Bytecode.display_code" method to + "dis.Bytecode.dis" and converted it to returning a string rather than + printing output. + +- Issue #19378: the "line_offset" parameter in the new "dis.get_instructions" + API has been renamed to "first_line" (and the default value and usage + changed accordingly). This should reduce confusion with the more common use + of "offset" in the dis docs to refer to bytecode offsets. + +- Issue #18678: Corrected spwd struct member names in spwd module: + sp_nam->sp_namp, and sp_pwd->sp_pwdp. The old names are kept as extra + structseq members, for backward compatibility. + +- Issue #6157: Fixed tkinter.Text.debug(). tkinter.Text.bbox() now raises + TypeError instead of TclError on wrong number of arguments. Original patch + by Guilherme Polo. + +- Issue #10197: Rework subprocess.get[status]output to use subprocess + functionality and thus to work on Windows. Patch by Nick Coghlan + +- Issue #6160: The bbox() method of tkinter.Spinbox now returns a tuple of + integers instead of a string. Based on patch by Guilherme Polo. + +- Issue #19403: contextlib.redirect_stdout is now reentrant + +- Issue #19286: Directories in ``package_data`` are no longer added to + the filelist, preventing failure outlined in the ticket. + +- Issue #19480: HTMLParser now accepts all valid start-tag names as defined + by the HTML5 standard. + +- Issue #15114: The html.parser module now raises a DeprecationWarning when the + strict argument of HTMLParser or the HTMLParser.error method are used. + +- Issue #19410: Undo the special-casing removal of '' for + importlib.machinery.FileFinder. + +- Issue #19424: Fix the warnings module to accept filename containing surrogate + characters. + +- Issue #19435: Fix directory traversal attack on CGIHttpRequestHandler. + +- Issue #19227: Remove pthread_atfork() handler. The handler was added to + solve #18747 but has caused issues. + +- Issue #19420: Fix reference leak in module initialization code of + _hashopenssl.c + +- Issue #19329: Optimized compiling charsets in regular expressions. + +- Issue #19227: Try to fix deadlocks caused by re-seeding then OpenSSL + pseudo-random number generator on fork(). + +- Issue #16037: HTTPMessage.readheaders() raises an HTTPException when more than + 100 headers are read. Adapted from patch by Jyrki Pulliainen. + +- Issue #16040: CVE-2013-1752: nntplib: Limit maximum line lengths to 2048 to + prevent readline() calls from consuming too much memory. Patch by Jyrki + Pulliainen. + +- Issue #16041: CVE-2013-1752: poplib: Limit maximum line lengths to 2048 to + prevent readline() calls from consuming too much memory. Patch by Jyrki + Pulliainen. + +- Issue #17997: Change behavior of ``ssl.match_hostname()`` to follow RFC 6125, + for security reasons. It now doesn't match multiple wildcards nor wildcards + inside IDN fragments. + +- Issue #16039: CVE-2013-1752: Change use of readline in imaplib module to limit + line length. Patch by Emil Lind. + +- Issue #19330: the unnecessary wrapper functions have been removed from the + implementations of the new contextlib.redirect_stdout and + contextlib.suppress context managers, which also ensures they provide + reasonable help() output on instances + +- Issue #19393: Fix symtable.symtable function to not be confused when there are + functions or classes named "top". + +- Issue #18685: Restore re performance to pre-PEP 393 levels. + +- Issue #19339: telnetlib module is now using time.monotonic() when available + to compute timeout. + +- Issue #19399: fix sporadic test_subprocess failure. + +- Issue #13234: Fix os.listdir to work with extended paths on Windows. + Patch by Santoso Wijaya. + +- Issue #19375: The site module adding a "site-python" directory to sys.path, + if it exists, is now deprecated. + +- Issue #19379: Lazily import linecache in the warnings module, to make + startup with warnings faster until a warning gets printed. + +- Issue #19288: Fixed the "in" operator of dbm.gnu databases for string + argument. Original patch by Arfrever Frehtes Taifersar Arahesis. + +- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string + argument. Original patch by Arfrever Frehtes Taifersar Arahesis. + +- Issue #19327: Fixed the working of regular expressions with too big charset. + +- Issue #17400: New 'is_global' attribute for ipaddress to tell if an address + is allocated by IANA for global or private networks. + +- Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin + Williams. + +- Issue #19365: Optimized the parsing of long replacement string in re.sub*() + functions. + +- Issue #19352: Fix unittest discovery when a module can be reached + through several paths (e.g. under Debian/Ubuntu with virtualenv). + +- Issue #15207: Fix mimetypes to read from correct part of Windows registry + Original patch by Dave Chambers + +- Issue #16595: Add prlimit() to resource module. + +- Issue #19324: Expose Linux-specific constants in resource module. + +- Load SSL's error strings in hashlib. + +- Issue #18527: Upgrade internal copy of zlib to 1.2.8. + +- Issue #19274: Add a filterfunc parameter to PyZipFile.writepy. + +- Issue #8964: fix platform._sys_version to handle IronPython 2.6+. + Patch by Martin Matusiak. + +- Issue #19413: Restore pre-3.3 reload() semantics of re-finding modules. + +- Issue #18958: Improve error message for json.load(s) while passing a string + that starts with a UTF-8 BOM. + +- Issue #19307: Improve error message for json.load(s) while passing objects + of the wrong type. + +- Issue #16038: CVE-2013-1752: ftplib: Limit amount of data read by + limiting the call to readline(). Original patch by Michał + Jastrzębski and Giampaolo Rodola. + +- Issue #17087: Improved the repr for regular expression match objects. + +Tests +----- + +- Issue #19664: test_userdict's repr test no longer depends on the order + of dict elements. + +- Issue #19440: Clean up test_capi by removing an unnecessary __future__ + import, converting from test_main to unittest.main, and running the + _testcapi module tests as subTests of a unittest TestCase method. + +- Issue #19378: the main dis module tests are now run with both stdout + redirection *and* passing an explicit file parameter + +- Issue #19378: removed the not-actually-helpful assertInstructionMatches + and assertBytecodeExactlyMatches helpers from bytecode_helper + +- Issue #18702: All skipped tests now reported as skipped. + +- Issue #19439: interpreter embedding tests are now executed on Windows + (Patch by Zachary Ware) + +- Issue #19085: Added basic tests for all tkinter widget options. + +- Issue #19384: Fix test_py_compile for root user, patch by Claudiu Popa. + +Documentation +------------- + +- Issue #18326: Clarify that list.sort's arguments are keyword-only. Also, + attempt to reduce confusion in the glossary by not saying there are + different "types" of arguments and parameters. + +Build +----- + +- Issue #19358: "make clinic" now runs the Argument Clinic preprocessor + over all CPython source files. + +- Update SQLite to 3.8.1, xz to 5.0.5, and Tcl/Tk to 8.6.1 on Windows. + +- Issue #16632: Enable DEP and ASLR on Windows. + +- Issue #17791: Drop PREFIX and EXEC_PREFIX definitions from PC/pyconfig.h + +- Add workaround for VS 2010 nmake clean issue. VS 2010 doesn't set up PATH + for nmake.exe correctly. + +- Issue #19550: Implement Windows installer changes of PEP 453 (ensurepip). + +- Issue #19520: Fix compiler warning in the _sha3 module on 32bit Windows. + +- Issue #19356: Avoid using a C variabled named "_self", it's a reserved + word in some C compilers. + +- Issue #15792: Correct build options on Win64. Patch by Jeremy Kloth. + +- Issue #19373: Apply upstream change to Tk 8.5.15 fixing OS X 10.9 + screen refresh problem for OS X installer build. + +- Issue #19649: On OS X, the same set of file names are now installed + in bin directories for all configurations: non-framework vs framework, + and single arch vs universal builds. pythonx.y-32 is now always + installed for 64-bit/32-bit universal builds. The obsolete and + undocumented pythonw* symlinks are no longer installed anywhere. + +- Issue #19553: PEP 453 - "make install" and "make altinstall" now install or + upgrade pip by default, using the bundled pip provided by the new ensurepip + module. A new configure option, --with-ensurepip[=upgrade|install|no], is + available to override the default ensurepip "--upgrade" option. The option + can also be set with "make [alt]install ENSUREPIP=[upgrade|install|no]". + +- Issue #19551: PEP 453 - the OS X installer now installs pip by default. + +- Update third-party libraries for OS X installers: xz 5.0.3 -> 5.0.5, + SQLite 3.7.13 -> 3.8.1 + +- Issue #15663: Revert OS X installer built-in Tcl/Tk support for 3.4.0b1. + Some third-party projects, such as Matplotlib and PIL/Pillow, + depended on being able to build with Tcl and Tk frameworks in + /Library/Frameworks. + +Tools/Demos +----------- + +- Issue #19730: Argument Clinic now supports all the existing PyArg + "format units" as legacy converters, as well as two new features: + "self converters" and the "version" directive. + +- Issue #19552: pyvenv now bootstraps pip into virtual environments by + default (pass --without-pip to request the old behaviour) + +- Issue #19390: Argument Clinic no longer accepts malformed Python + and C ids. + + +What's New in Python 3.4.0 Alpha 4? +=================================== + +Release date: 2013-10-20 + +Core and Builtins +----------------- + +- Issue #19301: Give classes and functions that are explicitly marked global a + global qualname. + +- Issue #19279: UTF-7 decoder no longer produces illegal strings. + +- Issue #16612: Add "Argument Clinic", a compile-time preprocessor for + C files to generate argument parsing code. (See PEP 436.) + +- Issue #18810: Shift stat calls in importlib.machinery.FileFinder such that + the code is optimistic that if something exists in a directory named exactly + like the possible package being searched for that it's in actuality a + directory. + +- Issue #18416: importlib.machinery.PathFinder now treats '' as the cwd and + importlib.machinery.FileFinder no longer special-cases '' to '.'. This leads + to modules imported from cwd to now possess an absolute file path for + __file__ (this does not affect modules specified by path on the CLI but it + does affect -m/runpy). It also allows FileFinder to be more consistent by not + having an edge case. + +- Issue #4555: All exported C symbols are now prefixed with either + "Py" or "_Py". + +- Issue #19219: Speed up marshal.loads(), and make pyc files slightly + (5% to 10%) smaller. + +- Issue #19221: Upgrade Unicode database to version 6.3.0. + +- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must + now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL + if an error occurred), instead of a string allocated by PyMem_Malloc() or + PyMem_Realloc(). + +- Issue #19199: Remove ``PyThreadState.tick_counter`` field + +- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at + least one place so as to avoid regressions. + +- Issue #19087: Improve bytearray allocation in order to allow cheap popping + of data at the front (slice deletion). + +- Issue #19014: memoryview.cast() is now allowed on zero-length views. + +- Issue #18690: memoryview is now automatically registered with + collections.abc.Sequence + +- Issue #19078: memoryview now correctly supports the reversed builtin + (Patch by Claudiu Popa) + +Library +------- + +- Issue #17457: unittest test discovery now works with namespace packages. + Patch by Claudiu Popa. + +- Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX. + Patch by David Edelsohn. + +- Issue #18606: Add the new "statistics" module (PEP 450). Contributed + by Steven D'Aprano. + +- Issue #12866: The audioop module now supports 24-bit samples. + +- Issue #19254: Provide an optimized Python implementation of pbkdf2_hmac. + +- Issues #19201, Issue #19222, Issue #19223: Add "x" mode (exclusive creation) + in opening file to bz2, gzip and lzma modules. Patches by Tim Heaney and + Vajrasky Kok. + +- Fix a reference count leak in _sre. + +- Issue #19262: Initial check in of the 'asyncio' package (a.k.a. Tulip, + a.k.a. PEP 3156). There are no docs yet, and the PEP is slightly + out of date with the code. This module will have *provisional* status + in Python 3.4. + +- Issue #19276: Fixed the wave module on 64-bit big-endian platforms. + +- Issue #19266: Rename the new-in-3.4 ``contextlib.ignore`` context manager + to ``contextlib.suppress`` in order to be more consistent with existing + descriptions of that operation elsewhere in the language and standard + library documentation (Patch by Zero Piraeus). + +- Issue #18891: Completed the new email package (provisional) API additions + by adding new classes EmailMessage, MIMEPart, and ContentManager. + +- Issue #18281: Unused stat constants removed from `tarfile`. + +- Issue #18999: Multiprocessing now supports 'contexts' with the same API + as the module, but bound to specified start methods. + +- Issue #18468: The re.split, re.findall, and re.sub functions and the group() + and groups() methods of match object now always return a string or a bytes + object. + +- Issue #18725: The textwrap module now supports truncating multiline text. + +- Issue #18776: atexit callbacks now display their full traceback when they + raise an exception. + +- Issue #17827: Add the missing documentation for ``codecs.encode`` and + ``codecs.decode``. + +- Issue #19218: Rename collections.abc to _collections_abc in order to + speed up interpreter start. + +- Issue #18582: Add 'pbkdf2_hmac' to the hashlib module. It implements PKCS#5 + password-based key derivation functions with HMAC as pseudorandom function. + +- Issue #19131: The aifc module now correctly reads and writes sampwidth of + compressed streams. + +- Issue #19209: Remove import of copyreg from the os module to speed up + interpreter startup. stat_result and statvfs_result are now hard-coded to + reside in the os module. + +- Issue #19205: Don't import the 're' module in site and sysconfig module to + speed up interpreter start. + +- Issue #9548: Add a minimal "_bootlocale" module that is imported by the + _io module instead of the full locale module. + +- Issue #18764: Remove the 'print' alias for the PDB 'p' command so that it no + longer shadows the print function. + +- Issue #19158: A rare race in BoundedSemaphore could allow .release() too + often. + +- Issue #15805: Add contextlib.redirect_stdout(). + +- Issue #18716: Deprecate the formatter module. + +- Issue #10712: 2to3 has a new "asserts" fixer that replaces deprecated names + of unittest methods (e.g. failUnlessEqual -> assertEqual). + +- Issue #18037: 2to3 now escapes ``'\u'`` and ``'\U'`` in native strings. + +- Issue #17839: base64.decodebytes and base64.encodebytes now accept any + object that exports a 1 dimensional array of bytes (this means the same + is now also true for base64_codec) + +- Issue #19132: The pprint module now supports compact mode. + +- Issue #19137: The pprint module now correctly formats instances of set and + frozenset subclasses. + +- Issue #10042: functools.total_ordering now correctly handles + NotImplemented being returned by the underlying comparison function (Patch + by Katie Miller) + +- Issue #19092: contextlib.ExitStack now correctly reraises exceptions + from the __exit__ callbacks of inner context managers (Patch by Hrvoje + Nikšić) + +- Issue #12641: Avoid passing "-mno-cygwin" to the mingw32 compiler, except + when necessary. Patch by Oscar Benjamin. + +- Issue #5845: In site.py, only load readline history from ~/.python_history + if no history has been read already. This avoids double writes to the + history file at shutdown. + +- Properly initialize all fields of a SSL object after allocation. + +- Issue #19095: SSLSocket.getpeercert() now raises ValueError when the + SSL handshake hasn't been done. + +- Issue #4366: Fix building extensions on all platforms when --enable-shared + is used. + +- Issue #19030: Fixed `inspect.getmembers` and `inspect.classify_class_attrs` + to attempt activating descriptors before falling back to a __dict__ search + for faulty descriptors. `inspect.classify_class_attrs` no longer returns + Attributes whose home class is None. + +C API +----- + +- Issue #1772673: The type of `char*` arguments now changed to `const char*`. + +- Issue #16129: Added a `Py_SetStandardStreamEncoding` pre-initialization API + to allow embedding applications like Blender to force a particular + encoding and error handler for the standard IO streams (initial patch by + Bastien Montagne) + +Tests +----- + +- Issue #19275: Fix test_site on AMD64 Snow Leopard + +- Issue #14407: Fix unittest test discovery in test_concurrent_futures. + +- Issue #18919: Unified and extended tests for audio modules: aifc, sunau and + wave. + +- Issue #18714: Added tests for ``pdb.find_function()``. + +Documentation +------------- + +- Issue #18758: Fixed and improved cross-references. + +- Issue #18972: Modernize email examples and use the argparse module in them. + +Build +----- + +- Issue #19130: Correct PCbuild/readme.txt, Python 3.3 and 3.4 require VS 2010. + +- Issue #15663: Update OS X 10.6+ installer to use Tcl/Tk 8.5.15. + +- Issue #14499: Fix several problems with OS X universal build support: + 1. ppc arch detection for extension module builds broke with Xcode 5 + 2. ppc arch detection in configure did not work on OS X 10.4 + 3. -sysroot and -arch flags were unnecessarily duplicated + 4. there was no obvious way to configure an intel-32 only build. + +- Issue #19019: Change the OS X installer build script to use CFLAGS instead + of OPT for special build options. By setting OPT, some compiler-specific + options like -fwrapv were overridden and thus not used, which could result + in broken interpreters when building with clang. + + +What's New in Python 3.4.0 Alpha 3? +=================================== + +Release date: 2013-09-29 + +Core and Builtins +----------------- + +- Issue #18818: The "encodingname" part of PYTHONIOENCODING is now optional. + +- Issue #19098: Prevent overflow in the compiler when the recursion limit is set + absurdly high. + +Library +------- + +- Issue #18929: `inspect.classify_class_attrs()` now correctly finds class + attributes returned by `dir()` that are located in the metaclass. + +- Issue #18950: Fix miscellaneous bugs in the sunau module. + Au_read.readframes() now updates current file position and reads correct + number of frames from multichannel stream. Au_write.writeframesraw() now + correctly updates current file position. Au_read.getnframes() now returns an + integer (as in Python 2). Au_read and Au_write now correctly works with file + object if start file position is not a zero. + +- Issue #18594: The fast path for collections.Counter() was never taken + due to an over-restrictive type check. + +- Issue #19053: ZipExtFile.read1() with non-zero argument no more returns empty + bytes until end of data. + +- logging: added support for Unix domain sockets to SocketHandler and + DatagramHandler. + +- Issue #18996: TestCase.assertEqual() now more cleverly shorten differing + strings in error report. + +- Issue #19034: repr() for tkinter.Tcl_Obj now exposes string reperesentation. + +- Issue #18978: ``urllib.request.Request`` now allows the method to be + indicated on the class and no longer sets it to None in ``__init__``. + +- Issue #18626: the inspect module now offers a basic command line + introspection interface (Initial patch by Claudiu Popa) + +- Issue #3015: Fixed tkinter with wantobject=False. Any Tcl command call + returned empty string. + +- Issue #19037: The mailbox module now makes all changes to maildir files + before moving them into place, to avoid race conditions with other programs + that may be accessing the maildir directory. + +- Issue #14984: On POSIX systems, when netrc is called without a filename + argument (and therefore is reading the user's $HOME/.netrc file), it now + enforces the same security rules as typical ftp clients: the .netrc file must + be owned by the user that owns the process and must not be readable by any + other user. + +- Issue #18873: The tokenize module now detects Python source code encoding + only in comment lines. + +- Issue #17764: Enable http.server to bind to a user specified network + interface. Patch contributed by Malte Swart. + +- Issue #18937: Add an assertLogs() context manager to unittest.TestCase + to ensure that a block of code emits a message using the logging module. + +- Issue #17324: Fix http.server's request handling case on trailing '/'. Patch + contributed by Vajrasky Kok. + +- Issue #19018: The heapq.merge() function no longer suppresses IndexError + in the underlying iterables. + +- Issue #18784: The uuid module no longer attempts to load libc via ctypes.CDLL + if all the necessary functions have already been found in libuuid. Patch by + Evgeny Sologubov. + +- The :envvar:`PYTHONFAULTHANDLER` environment variable now only enables the + faulthandler module if the variable is non-empty. Same behaviour than other + variables like :envvar:`PYTHONDONTWRITEBYTECODE`. + +- Issue #1565525: New function ``traceback.clear_frames`` will clear + the local variables of all the stack frames referenced by a traceback + object. + +Tests +----- + +- Issue #18952: Fix regression in support data downloads introduced when + test.support was converted to a package. Regression noticed by Zachary + Ware. + +IDLE +---- + +- Issue #18873: IDLE now detects Python source code encoding only in comment + lines. + +- Issue #18988: The "Tab" key now works when a word is already autocompleted. + +Documentation +------------- + +- Issue #17003: Unified the size argument names in the io module with common + practice. + +Build +----- + +- Issue #18596: Support the use of address sanity checking in recent versions + of clang and GCC by appropriately marking known false alarms in the small + object allocator. Patch contributed by Dhiru Kholia. + +Tools/Demos +----------- + +- Issue #18873: 2to3 and the findnocoding.py script now detect Python source + code encoding only in comment lines. + + +What's New in Python 3.4.0 Alpha 2? +=================================== + +Release date: 2013-09-09 + +Core and Builtins +----------------- + +- Issue #18942: sys._debugmallocstats() output was damaged on Windows. + +- Issue #18571: Implementation of the PEP 446: file descriptors and file + handles are now created non-inheritable; add functions + os.get/set_inheritable(), os.get/set_handle_inheritable() and + socket.socket.get/set_inheritable(). + +- Issue #11619: The parser and the import machinery do not encode Unicode + filenames anymore on Windows. + +- Issue #18808: Non-daemon threads are now automatically joined when + a sub-interpreter is shutdown (it would previously dump a fatal error). + +- Remove support for compiling on systems without getcwd(). + +- Issue #18774: Remove last bits of GNU PTH thread code and thread_pth.h. + +- Issue #18771: Add optimization to set object lookups to reduce the cost + of hash collisions. The core idea is to inspect a second key/hash pair + for each cache line retrieved. + +- Issue #16105: When a signal handler fails to write to the file descriptor + registered with ``signal.set_wakeup_fd()``, report an exception instead + of ignoring the error. + +- Issue #18722: Remove uses of the "register" keyword in C code. + +- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions. + +- Issue #16499: Add command line option for isolated mode. + +- Issue #15301: Parsing fd, uid, and gid parameters for builtins + in Modules/posixmodule.c is now far more robust. + +- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc() + fail. + +- Issue #17934: Add a clear() method to frame objects, to help clean up + expensive details (local variables) and break reference cycles. + +- Issue #18780: %-formatting codes %d, %i, and %u now treat int-subclasses + as int (displays value of int-subclass instead of str(int-subclass) ). + +Library +------- + +- Issue #18808: Thread.join() now waits for the underlying thread state to + be destroyed before returning. This prevents unpredictable aborts in + Py_EndInterpreter() when some non-daemon threads are still running. + +- Issue #18458: Prevent crashes with newer versions of libedit. Its readline + emulation has changed from 0-based indexing to 1-based like gnu readline. + +- Issue #18852: Handle case of ``readline.__doc__`` being ``None`` in the new + readline activation code in ``site.py``. + +- Issue #18672: Fixed format specifiers for Py_ssize_t in debugging output in + the _sre module. + +- Issue #18830: inspect.getclasstree() no longer produces duplicate entries even + when input list contains duplicates. + +- Issue #18878: sunau.open now supports the context management protocol. Based on + patches by Claudiu Popa and R. David Murray. + +- Issue #18909: Fix _tkinter.tkapp.interpaddr() on Windows 64-bit, don't cast + 64-bit pointer to long (32 bits). + +- Issue #18876: The FileIO.mode attribute now better reflects the actual mode + under which the file was opened. Patch by Erik Bray. + +- Issue #16853: Add new selectors module. + +- Issue #18882: Add threading.main_thread() function. + +- Issue #18901: The sunau getparams method now returns a namedtuple rather than + a plain tuple. Patch by Claudiu Popa. + +- Issue #17487: The result of the wave getparams method now is pickleable again. + Patch by Claudiu Popa. + +- Issue #18756: os.urandom() now uses a lazily-opened persistent file + descriptor, so as to avoid using many file descriptors when run in + parallel from multiple threads. + +- Issue #18418: After fork(), reinit all threads states, not only active ones. + Patch by A. Jesse Jiryu Davis. + +- Issue #17974: Switch unittest from using getopt to using argparse. + +- Issue #11798: TestSuite now drops references to own tests after execution. + +- Issue #16611: http.cookie now correctly parses the 'secure' and 'httponly' + cookie flags. + +- Issue #11973: Fix a problem in kevent. The flags and fflags fields are now + properly handled as unsigned. + +- Issue #18807: ``pyvenv`` now takes a --copies argument allowing copies + instead of symlinks even where symlinks are available and the default. + +- Issue #18538: ``python -m dis`` now uses argparse for argument processing. + Patch by Michele Orrù. + +- Issue #18394: Close cgi.FieldStorage's optional file. + +- Issue #17702: On error, os.environb now suppresses the exception context + when raising a new KeyError with the original key. + +- Issue #16809: Fixed some tkinter incompabilities with Tcl/Tk 8.6. + +- Issue #16809: Tkinter's splitlist() and split() methods now accept Tcl_Obj + argument. + +- Issue #17211: Yield a namedtuple in pkgutil. + Patch by Ramchandra Apte. + +- Issue #18324: set_payload now correctly handles binary input. This also + supersedes the previous fixes for #14360, #1717, and #16564. + +- Issue #18794: Add a fileno() method and a closed attribute to select.devpoll + objects. + +- Issue #17119: Fixed integer overflows when processing large strings and tuples + in the tkinter module. + +- Issue #15352: Rebuild frozen modules when marshal.c is changed. + +- Issue #18747: Re-seed OpenSSL's pseudo-random number generator after fork. + A pthread_atfork() parent handler is used to seed the PRNG with pid, time + and some stack data. + +- Issue #8865: Concurrent invocation of select.poll.poll() now raises a + RuntimeError exception. Patch by Christian Schubert. + +- Issue #18777: The ssl module now uses the new CRYPTO_THREADID API of + OpenSSL 1.0.0+ instead of the deprecated CRYPTO id callback function. + +- Issue #18768: Correct doc string of RAND_edg(). Patch by Vajrasky Kok. + +- Issue #18178: Fix ctypes on BSD. dlmalloc.c was compiled twice which broke + malloc weak symbols. + +- Issue #18709: Fix CVE-2013-4238. The SSL module now handles NULL bytes + inside subjectAltName correctly. Formerly the module has used OpenSSL's + GENERAL_NAME_print() function to get the string representation of ASN.1 + strings for ``rfc822Name`` (email), ``dNSName`` (DNS) and + ``uniformResourceIdentifier`` (URI). + +- Issue #18701: Remove support of old CPython versions (<3.0) from C code. + +- Issue #18756: Improve error reporting in os.urandom() when the failure + is due to something else than /dev/urandom not existing (for example, + exhausting the file descriptor limit). + +- Issue #18673: Add O_TMPFILE to os module. O_TMPFILE requires Linux kernel + 3.11 or newer. It's only defined on system with 3.11 uapi headers, too. + +- Issue #18532: Change the builtin hash algorithms' names to lower case names + as promised by hashlib's documentation. + +- Issue #8713: add new spwan and forkserver start methods, and new functions + get_all_start_methods, get_start_method, and set_start_method, to + multiprocessing. + +- Issue #18405: Improve the entropy of crypt.mksalt(). + +- Issue #12015: The tempfile module now uses a suffix of 8 random characters + instead of 6, to reduce the risk of filename collision. The entropy was + reduced when uppercase letters were removed from the charset used to generate + random characters. + +- Issue #18585: Add :func:`textwrap.shorten` to collapse and truncate a + piece of text to a given length. + +- Issue #18598: Tweak exception message for importlib.import_module() to + include the module name when a key argument is missing. + +- Issue #19151: Fix docstring and use of _get_supported_file_loaders() to + reflect 2-tuples. + +- Issue #19152: Add ExtensionFileLoader.get_filename(). + +- Issue #18676: Change 'positive' to 'non-negative' in queue.py put and get + docstrings and ValueError messages. Patch by Zhongyue Luo + +- Fix refcounting issue with extension types in tkinter. + +- Issue #8112: xlmrpc.server's DocXMLRPCServer server no longer raises an error + if methods have annotations; it now correctly displays the annotations. + +- Issue #18600: Added policy argument to email.message.Message.as_string, + and as_bytes and __bytes__ methods to Message. + +- Issue #18671: Output more information when logging exceptions occur. + +- Issue #18621: Prevent the site module's patched builtins from keeping + too many references alive for too long. + +- Issue #4885: Add weakref support to mmap objects. Patch by Valerie Lambert. + +- Issue #8860: Fixed rounding in timedelta constructor. + +- Issue #18849: Fixed a Windows-specific tempfile bug where collision with an + existing directory caused mkstemp and related APIs to fail instead of + retrying. Report and fix by Vlad Shcherbina. + +- Issue #18920: argparse's default destination for the version action (-v, + --version) has also been changed to stdout, to match the Python executable. + +Tests +----- + +- Issue #18623: Factor out the _SuppressCoreFiles context manager into + test.support. Patch by Valerie Lambert. + +- Issue #12037: Fix test_email for desktop Windows. + +- Issue #15507: test_subprocess's test_send_signal could fail if the test + runner were run in an environment where the process inherited an ignore + setting for SIGINT. Restore the SIGINT handler to the desired + KeyboardInterrupt raising one during that test. + +- Issue #16799: Switched from getopt to argparse style in regrtest's argument + parsing. Added more tests for regrtest's argument parsing. + +- Issue #18792: Use "127.0.0.1" or "::1" instead of "localhost" as much as + possible, since "localhost" goes through a DNS lookup under recent Windows + versions. + +IDLE +---- + +- Issue #18489: Add tests for SearchEngine. Original patch by Phil Webster. + +Documentation +------------- + +- Issue #18743: Fix references to non-existent "StringIO" module. + +- Issue #18783: Removed existing mentions of Python long type in docstrings, + error messages and comments. + +Build +----- + +- Issue #1584: Provide configure options to override default search paths for + Tcl and Tk when building _tkinter. + +- Issue #15663: Tcl/Tk 8.5.14 is now included with the OS X 10.6+ 64-/32-bit + installer. It is no longer necessary to install a third-party version of + Tcl/Tk 8.5 to work around the problems in the Apple-supplied Tcl/Tk 8.5 + shipped in OS X 10.6 and later releases. + +Tools/Demos +----------- + +- Issue #18922: Now The Lib/smtpd.py and Tools/i18n/msgfmt.py scripts write + their version strings to stdout, and not to sderr. + + +What's New in Python 3.4.0 Alpha 1? +=================================== + +Release date: 2013-08-03 + +Core and Builtins +----------------- + +- Issue #16741: Fix an error reporting in int(). + +- Issue #17899: Fix rare file descriptor leak in os.listdir(). + +- Issue #10241: Clear extension module dict copies at interpreter shutdown. + Patch by Neil Schemenauer, minimally modified. + +- Issue #9035: ismount now recognises volumes mounted below a drive root + on Windows. Original patch by Atsuo Ishimoto. + +- Issue #18214: Improve finalization of Python modules to avoid setting + their globals to None, in most cases. + +- Issue #18112: PEP 442 implementation (safe object finalization). + +- Issue #18552: Check return value of PyArena_AddPyObject() in + obj2ast_object(). + +- Issue #18560: Fix potential NULL pointer dereference in sum(). + +- Issue #18520: Add a new PyStructSequence_InitType2() function, same than + PyStructSequence_InitType() except that it has a return value (0 on success, + -1 on error). + +- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0], + prefix and exec_prefix if the operation system does not obey MAXPATHLEN. + +- Issue #18408: Fix many various bugs in code handling errors, especially + on memory allocation failure (MemoryError). + +- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all(). + +- Issue #18342: Use the repr of a module name when an import fails when using + ``from ... import ...``. + +- Issue #17872: Fix a segfault in marshal.load() when input stream returns + more bytes than requested. + +- Issue #18338: `python --version` now prints version string to stdout, and + not to stderr. Patch by Berker Peksag and Michael Dickens. + +- Issue #18426: Fix NULL pointer dereference in C extension import when + PyModule_GetDef() returns an error. + +- Issue #17206: On Windows, increase the stack size from 2 MB to 4.2 MB to fix + a stack overflow in the marshal module (fix a crash in test_marshal). + Patch written by Jeremy Kloth. + +- Issue #3329: Implement the PEP 445: Add new APIs to customize Python memory + allocators. + +- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the + tstate is first removed from TLS and then deallocated. + +- Issue #13483: Use VirtualAlloc in obmalloc on Windows. + +- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise + OverflowError when an argument of %c format is out of range. + +- Issue #18111: The min() and max() functions now support a default argument + to be returned instead of raising a ValueError on an empty sequence. + (Contributed by Julian Berman.) + +- Issue #18137: Detect integer overflow on precision in float.__format__() + and complex.__format__(). + +- Issue #15767: Introduce ModuleNotFoundError which is raised when a module + could not be found. + +- Issue #18183: Fix various unicode operations on strings with large unicode + codepoints. + +- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows(). + +- Issue #18038: SyntaxError raised during compilation sources with illegal + encoding now always contains an encoding name. + +- Issue #17931: Resolve confusion on Windows between pids and process + handles. + +- Tweak the exception message when the magic number or size value in a bytecode + file is truncated. + +- Issue #17932: Fix an integer overflow issue on Windows 64-bit in iterators: + change the C type of seqiterobject.it_index from long to Py_ssize_t. + +- Issue #18065: Don't set __path__ to the package name for frozen packages. + +- Issue #18088: When reloading a module, unconditionally reset all relevant + attributes on the module (e.g. __name__, __loader__, __package__, __file__, + __cached__). + +- Issue #17937: Try harder to collect cyclic garbage at shutdown. + +- Issue #12370: Prevent class bodies from interfering with the __class__ + closure. + +- Issue #17644: Fix a crash in str.format when curly braces are used in square + brackets. + +- Issue #17237: Fix crash in the ASCII decoder on m68k. + +- Issue #17927: Frame objects kept arguments alive if they had been + copied into a cell, even if the cell was cleared. + +- Issue #1545463: At shutdown, defer finalization of codec modules so + that stderr remains usable. + +- Issue #7330: Implement width and precision (ex: "%5.3s") for the format + string of PyUnicode_FromFormat() function, original patch written by Ysj Ray. + +- Issue #1545463: Global variables caught in reference cycles are now + garbage-collected at shutdown. + +- Issue #17094: Clear stale thread states after fork(). Note that this + is a potentially disruptive change since it may release some system + resources which would otherwise remain perpetually alive (e.g. database + connections kept in thread-local storage). + +- Issue #17408: Avoid using an obsolete instance of the copyreg module when + the interpreter is shutdown and then started again. + +- Issue #5845: Enable tab-completion in the interactive interpreter by + default, thanks to a new sys.__interactivehook__. + +- Issue #17115,17116: Module initialization now includes setting __package__ and + __loader__ attributes to None. + +- Issue #17853: Ensure locals of a class that shadow free variables always win + over the closures. + +- Issue #17863: In the interactive console, don't loop forever if the encoding + can't be fetched from stdin. + +- Issue #17867: Raise an ImportError if __import__ is not found in __builtins__. + +- Issue #18698: Ensure importlib.reload() returns the module out of sys.modules. + +- Issue #17857: Prevent build failures with pre-3.5.0 versions of sqlite3, + such as was shipped with Centos 5 and Mac OS X 10.4. + +- Issue #17413: sys.settrace callbacks were being passed a string instead of an + exception instance for the 'value' element of the arg tuple if the exception + originated from C code; now an exception instance is always provided. + +- Issue #17782: Fix undefined behaviour on platforms where + ``struct timespec``'s "tv_nsec" member is not a C long. + +- Issue #17722: When looking up __round__, resolve descriptors. + +- Issue #16061: Speed up str.replace() for replacing 1-character strings. + +- Issue #17715: Fix segmentation fault from raising an exception in a __trunc__ + method. + +- Issue #17643: Add __callback__ attribute to weakref.ref. + +- Issue #16447: Fixed potential segmentation fault when setting __name__ on a + class. + +- Issue #17669: Fix crash involving finalization of generators using yield from. + +- Issue #14439: Python now prints the traceback on runpy failure at startup. + +- Issue #17469: Fix _Py_GetAllocatedBlocks() and sys.getallocatedblocks() + when running on valgrind. + +- Issue #17619: Make input() check for Ctrl-C correctly on Windows. + +- Issue #17357: Add missing verbosity messages for -v/-vv that were lost during + the importlib transition. + +- Issue #17610: Don't rely on non-standard behavior of the C qsort() function. + +- Issue #17323: The "[X refs, Y blocks]" printed by debug builds has been + disabled by default. It can be re-enabled with the `-X showrefcount` option. + +- Issue #17328: Fix possible refleak in dict.setdefault. + +- Issue #17275: Corrected class name in init error messages of the C version of + BufferedWriter and BufferedRandom. + +- Issue #7963: Fixed misleading error message that issued when object is + called without arguments. + +- Issue #8745: Small speed up zipimport on Windows. Patch by Catalin Iacob. + +- Issue #5308: Raise ValueError when marshalling too large object (a sequence + with size >= 2**31), instead of producing illegal marshal data. + +- Issue #12983: Bytes literals with invalid ``\x`` escape now raise a SyntaxError + and a full traceback including line number. + +- Issue #16967: In function definition, evaluate positional defaults before + keyword-only defaults. + +- Issue #17173: Remove uses of locale-dependent C functions (isalpha() etc.) + in the interpreter. + +- Issue #17137: When a Unicode string is resized, the internal wide character + string (wstr) format is now cleared. + +- Issue #17043: The unicode-internal decoder no longer read past the end of + input buffer. + +- Issue #17098: All modules now have __loader__ set even if they pre-exist the + bootstrapping of importlib. + +- Issue #16979: Fix error handling bugs in the unicode-escape-decode decoder. + +- Issue #16772: The base argument to the int constructor no longer accepts + floats, or other non-integer objects with an __int__ method. Objects + with an __index__ method are now accepted. + +- Issue #10156: In the interpreter's initialization phase, unicode globals + are now initialized dynamically as needed. + +- Issue #16980: Fix processing of escaped non-ascii bytes in the + unicode-escape-decode decoder. + +- Issue #16975: Fix error handling bug in the escape-decode bytes decoder. + +- Issue #14850: Now a charmap decoder treats U+FFFE as "undefined mapping" + in any mapping, not only in a string. + +- Issue #16613: Add *m* argument to ``collections.Chainmap.new_child`` to + allow the new child map to be specified explicitly. + +- Issue #16730: importlib.machinery.FileFinder now no longers raises an + exception when trying to populate its cache and it finds out the directory is + unreadable or has turned into a file. Reported and diagnosed by + David Pritchard. + +- Issue #16906: Fix a logic error that prevented most static strings from being + cleared. + +- Issue #11461: Fix the incremental UTF-16 decoder. Original patch by + Amaury Forgeot d'Arc. + +- Issue #16856: Fix a segmentation fault from calling repr() on a dict with + a key whose repr raise an exception. + +- Issue #16367: Fix FileIO.readall() on Windows for files larger than 2 GB. + +- Issue #16761: Calling int() with base argument only now raises TypeError. + +- Issue #16759: Support the full DWORD (unsigned long) range in Reg2Py + when retrieving a REG_DWORD value. This corrects functions like + winreg.QueryValueEx that may have been returning truncated values. + +- Issue #14420: Support the full DWORD (unsigned long) range in Py2Reg + when passed a REG_DWORD value. Fixes OverflowError in winreg.SetValueEx. + +- Issue #11939: Set the st_dev attribute of stat_result to allow Windows to + take advantage of the os.path.samefile/sameopenfile/samestat implementations + used by other platforms. + +- Issue #16772: The int() constructor's second argument (base) no longer + accepts non integer values. Consistent with the behavior in Python 2. + +- Issue #14470: Remove w9xpopen support per PEP 11. + +- Issue #9856: Replace deprecation warning with raising TypeError + in object.__format__. Patch by Florent Xicluna. + +- Issue #16597: In buffered and text IO, call close() on the underlying stream + if invoking flush() fails. + +- Issue #16722: In the bytes() constructor, try to call __bytes__ on the + argument before __index__. + +- Issue #16421: loading multiple modules from one shared object is now + handled correctly (previously, the first module loaded from that file + was silently returned). Patch by Václav Šmilauer. + +- Issue #16602: When a weakref's target was part of a long deallocation + chain, the object could remain reachable through its weakref even though + its refcount had dropped to zero. + +- Issue #16495: Remove extraneous NULL encoding check from bytes_decode(). + +- Issue #16619: Create NameConstant AST class to represent None, True, and False + literals. As a result, these constants are never loaded at runtime from + builtins. + +- Issue #16455: On FreeBSD and Solaris, if the locale is C, the + ASCII/surrogateescape codec is now used (instead of the locale encoding) to + decode the command line arguments. This change fixes inconsistencies with + os.fsencode() and os.fsdecode(), because these operating systems announce an + ASCII locale encoding, but actually use the ISO-8859-1 encoding in practice. + +- Issue #16562: Optimize dict equality testing. Patch by Serhiy Storchaka. + +- Issue #16588: Silence unused-but-set warnings in Python/thread_pthread + +- Issue #16592: stringlib_bytes_join doesn't raise MemoryError on allocation + failure. + +- Issue #16546: Fix: ast.YieldFrom argument is now mandatory. + +- Issue #16514: Fix regression causing a traceback when sys.path[0] is None + (actually, any non-string or non-bytes type). + +- Issue #16306: Fix multiple error messages when unknown command line + parameters where passed to the interpreter. Patch by Hieu Nguyen. + +- Issue #16215: Fix potential double memory free in str.replace(). Patch + by Serhiy Storchaka. + +- Issue #16290: A float return value from the __complex__ special method is no + longer accepted in the complex() constructor. + +- Issue #16416: On Mac OS X, operating system data are now always + encoded/decoded to/from UTF-8/surrogateescape, instead of the locale encoding + (which may be ASCII if no locale environment variable is set), to avoid + inconsistencies with os.fsencode() and os.fsdecode() functions which are + already using UTF-8/surrogateescape. + +- Issue #16453: Fix equality testing of dead weakref objects. + +- Issue #9535: Fix pending signals that have been received but not yet + handled by Python to not persist after os.fork() in the child process. + +- Issue #14794: Fix slice.indices to return correct results for huge values, + rather than raising OverflowError. + +- Issue #15001: fix segfault on "del sys.modules['__main__']". Patch by Victor + Stinner. + +- Issue #8271: the utf-8 decoder now outputs the correct number of U+FFFD + characters when used with the 'replace' error handler on invalid utf-8 + sequences. Patch by Serhiy Storchaka, tests by Ezio Melotti. + +- Issue #5765: Apply a hard recursion limit in the compiler instead of + blowing the stack and segfaulting. Initial patch by Andrea Griffini. + +- Issue #16402: When slicing a range, fix shadowing of exceptions from + __index__. + +- Issue #16336: fix input checking in the surrogatepass error handler. + Patch by Serhiy Storchaka. + +- Issue #8401: assigning an int to a bytearray slice (e.g. b[3:4] = 5) now + raises an error. + +- Issue #7317: Display full tracebacks when an error occurs asynchronously. + Patch by Alon Horev with update by Alexey Kachayev. + +- Issue #16309: Make PYTHONPATH="" behavior the same as if PYTHONPATH + not set at all. + +- Issue #10189: Improve the error reporting of SyntaxErrors related to global + and nonlocal statements. + +- Fix segfaults on setting __qualname__ on builtin types and attempting to + delete it on any type. + +- Issue #14625: Rewrite the UTF-32 decoder. It is now 3x to 4x faster. Patch + written by Serhiy Storchaka. + +- Issue #16345: Fix an infinite loop when ``fromkeys`` on a dict subclass + received a nonempty dict from the constructor. + +- Issue #16271: Fix strange bugs that resulted from __qualname__ appearing in a + class's __dict__ and on type. + +- Issue #12805: Make bytes.join and bytearray.join faster when the separator + is empty. Patch by Serhiy Storchaka. + +- Issue #6074: Ensure cached bytecode files can always be updated by the + user that created them, even when the source file is read-only. + +- Issue #15958: bytes.join and bytearray.join now accept arbitrary buffer + objects. + +- Issue #14783: Improve int() docstring and switch docstrings for str(), + range(), and slice() to use multi-line signatures. + +- Issue #16160: Subclass support now works for types.SimpleNamespace. + +- Issue #16148: Implement PEP 424, adding operator.length_hint and + PyObject_LengthHint. + +- Upgrade Unicode data (UCD) to version 6.2. + +- Issue #15379: Fix passing of non-BMP characters as integers for the charmap + decoder (already working as unicode strings). Patch by Serhiy Storchaka. + +- Issue #15144: Fix possible integer overflow when handling pointers as integer + values, by using `Py_uintptr_t` instead of `size_t`. Patch by Serhiy + Storchaka. + +- Issue #15965: Explicitly cast `AT_FDCWD` as (int). Required on Solaris 10 + (which defines `AT_FDCWD` as ``0xffd19553``), harmless on other platforms. + +- Issue #15839: Convert SystemErrors in `super()` to RuntimeErrors. + +- Issue #15448: Buffered IO now frees the buffer when closed, instead + of when deallocating. + +- Issue #15846: Fix SystemError which happened when using `ast.parse()` in an + exception handler on code with syntax errors. + +- Issue #15897: zipimport.c doesn't check return value of fseek(). + Patch by Felipe Cruz. + +- Issue #15801: Make sure mappings passed to '%' formatting are actually + subscriptable. + +- Issue #15111: __import__ should propagate ImportError when raised as a + side-effect of a module triggered from using fromlist. + +- Issue #15022: Add pickle and comparison support to types.SimpleNamespace. + +Library +------- + +- Issue #4331: Added functools.partialmethod (Initial patch by Alon Horev) + +- Issue #13461: Fix a crash in the TextIOWrapper.tell method on 64-bit + platforms. Patch by Yogesh Chaudhari. + +- Issue #18681: Fix a NameError in importlib.reload() (noticed by Weizhao Li). + +- Issue #14323: Expanded the number of digits in the coefficients for the + RGB -- YIQ conversions so that they match the FCC NTSC versions. + +- Issue #17998: Fix an internal error in regular expression engine. + +- Issue #17557: Fix os.getgroups() to work with the modified behavior of + getgroups(2) on OS X 10.8. Original patch by Mateusz Lenik. + +- Issue #18608: Avoid keeping a strong reference to the locale module + inside the _io module. + +- Issue #18619: Fix atexit leaking callbacks registered from sub-interpreters, + and make it GC-aware. + +- Issue #15699: The readline module now uses PEP 3121-style module + initialization, so as to reclaim allocated resources (Python callbacks) + at shutdown. Original patch by Robin Schreiber. + +- Issue #17616: wave.open now supports the context management protocol. + +- Issue #18599: Fix name attribute of _sha1.sha1() object. It now returns + 'SHA1' instead of 'SHA'. + +- Issue #13266: Added inspect.unwrap to easily unravel __wrapped__ chains + (initial patch by Daniel Urban and Aaron Iles) + +- Issue #18561: Skip name in ctypes' _build_callargs() if name is NULL. + +- Issue #18559: Fix NULL pointer dereference error in _pickle module + +- Issue #18556: Check the return type of PyUnicode_AsWideChar() in ctype's + U_set(). + +- Issue #17818: aifc.getparams now returns a namedtuple. + +- Issue #18549: Eliminate dead code in socket_ntohl() + +- Issue #18530: Remove additional stat call from posixpath.ismount. + Patch by Alex Gaynor. + +- Issue #18514: Fix unreachable Py_DECREF() call in PyCData_FromBaseObj() + +- Issue #9177: Calling read() or write() now raises ValueError, not + AttributeError, on a closed SSL socket. Patch by Senko Rasic. + +- Issue #18513: Fix behaviour of cmath.rect w.r.t. signed zeros on OS X 10.8 + + gcc. + +- Issue #18479: Changed venv Activate.ps1 to make deactivate a function, and + removed Deactivate.ps1. + +- Issue #18480: Add missing call to PyType_Ready to the _elementtree extension. + +- Issue #17778: Fix test discovery for test_multiprocessing. (Patch by + Zachary Ware.) + +- Issue #18393: The private module _gestalt and private functions + platform._mac_ver_gestalt, platform._mac_ver_lookup and + platform._bcd2str have been removed. This does not affect the public + interface of the platform module. + +- Issue #17482: functools.update_wrapper (and functools.wraps) now set the + __wrapped__ attribute correctly even if the underlying function has a + __wrapped__ attribute set. + +- Issue #18431: The new email header parser now decodes RFC2047 encoded words + in structured headers. + +- Issue #18432: The sched module's queue method was incorrectly returning + an iterator instead of a list. + +- Issue #18044: The new email header parser was mis-parsing encoded words where + an encoded character immediately followed the '?' that follows the CTE + character, resulting in a decoding failure. They are now decoded correctly. + +- Issue #18101: Tcl.split() now process strings nested in a tuple as it + do with byte strings. + +- Issue #18116: getpass was always getting an error when testing /dev/tty, + and thus was always falling back to stdin, and would then raise an exception + if stdin could not be used (such as /dev/null). It also leaked an open file. + All of these issues are now fixed. + +- Issue #17198: Fix a NameError in the dbm module. Patch by Valentina + Mukhamedzhanova. + +- Issue #18013: Fix cgi.FieldStorage to parse the W3C sample form. + +- Issue #18020: improve html.escape speed by an order of magnitude. + Patch by Matt Bryant. + +- Issue #18347: ElementTree's html serializer now preserves the case of + closing tags. + +- Issue #17261: Ensure multiprocessing's proxies use proper address. + +- Issue #18343: faulthandler.register() now keeps the previous signal handler + when the function is called twice, so faulthandler.unregister() restores + correctly the original signal handler. + +- Issue #17097: Make multiprocessing ignore EINTR. + +- Issue #18339: Negative ints keys in unpickler.memo dict no longer cause a + segfault inside the _pickle C extension. + +- Issue #18240: The HMAC module is no longer restricted to bytes and accepts + any bytes-like object, e.g. memoryview. Original patch by Jonas Borgström. + +- Issue #18224: Removed pydoc script from created venv, as it causes problems + on Windows and adds no value over and above python -m pydoc ... + +- Issue #18155: The csv module now correctly handles csv files that use + a delimiter character that has a special meaning in regexes, instead of + throwing an exception. + +- Issue #14360: encode_quopri can now be successfully used as an encoder + when constructing a MIMEApplication object. + +- Issue #11390: Add -o and -f command line options to the doctest CLI to + specify doctest options (and convert it to using argparse). + +- Issue #18135: ssl.SSLSocket.write() now raises an OverflowError if the input + string in longer than 2 gigabytes, and ssl.SSLContext.load_cert_chain() + raises a ValueError if the password is longer than 2 gigabytes. The ssl + module does not support partial write. + +- Issue #11016: Add C implementation of the stat module as _stat. + +- Issue #18248: Fix libffi build on AIX. + +- Issue #18259: Declare sethostname in socketmodule.c for AIX + +- Issue #18147: Add diagnostic functions to ssl.SSLContext(). get_ca_list() + lists all loaded CA certificates and cert_store_stats() returns amount of + loaded X.509 certs, X.509 CA certs and CRLs. + +- Issue #18167: cgi.FieldStorage no longer fails to handle multipart/form-data + when ``\r\n`` appears at end of 65535 bytes without other newlines. + +- Issue #18076: Introduce importlib.util.decode_source(). + +- Issue #18357: add tests for dictview set difference. + Patch by Fraser Tweedale. + +- importlib.abc.SourceLoader.get_source() no longer changes SyntaxError or + UnicodeDecodeError into ImportError. + +- Issue #18058, 18057: Make the namespace package loader meet the + importlib.abc.InspectLoader ABC, allowing for namespace packages to work with + runpy. + +- Issue #17177: The imp module is pending deprecation. + +- subprocess: Prevent a possible double close of parent pipe fds when the + subprocess exec runs into an error. Prevent a regular multi-close of the + /dev/null fd when any of stdin, stdout and stderr was set to DEVNULL. + +- Issue #18194: Introduce importlib.util.cache_from_source() and + source_from_cache() while documenting the equivalent functions in imp as + deprecated. + +- Issue #17907: Document imp.new_module() as deprecated in favour of + types.ModuleType. + +- Issue #18192: Introduce importlib.util.MAGIC_NUMBER and document as deprecated + imp.get_magic(). + +- Issue #18149: Add filecmp.clear_cache() to manually clear the filecmp cache. + Patch by Mark Levitt + +- Issue #18193: Add importlib.reload(). + +- Issue #18157: Stop using imp.load_module() in pydoc. + +- Issue #16102: Make uuid._netbios_getnode() work again on Python 3. + +- Issue #17134: Add ssl.enum_cert_store() as interface to Windows' cert store. + +- Issue #18143: Implement ssl.get_default_verify_paths() in order to debug + the default locations for cafile and capath. + +- Issue #17314: Move multiprocessing.forking over to importlib. + +- Issue #11959: SMTPServer and SMTPChannel now take an optional map, use of + which avoids affecting global state. + +- Issue #18109: os.uname() now decodes fields from the locale encoding, and + socket.gethostname() now decodes the hostname from the locale encoding, + instead of using the UTF-8 encoding in strict mode. + +- Issue #18089: Implement importlib.abc.InspectLoader.load_module. + +- Issue #18088: Introduce importlib.abc.Loader.init_module_attrs for setting + module attributes. Leads to the pending deprecation of + importlib.util.module_for_loader. + +- Issue #17403: urllib.parse.robotparser normalizes the urls before adding to + ruleline. This helps in handling certain types invalid urls in a conservative + manner. Patch contributed by Mher Movsisyan. + +- Issue #18070: Have importlib.util.module_for_loader() set attributes + unconditionally in order to properly support reloading. + +- Added importlib.util.module_to_load to return a context manager to provide the + proper module object to load. + +- Issue #18025: Fixed a segfault in io.BufferedIOBase.readinto() when raw + stream's read() returns more bytes than requested. + +- Issue #18011: As was originally intended, base64.b32decode() now raises a + binascii.Error if there are non-b32-alphabet characters present in the input + string, instead of a TypeError. + +- Issue #18072: Implement importlib.abc.InspectLoader.get_code() and + importlib.abc.ExecutionLoader.get_code(). + +- Issue #8240: Set the SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER flag on SSL + sockets. + +- Issue #17269: Workaround for socket.getaddrinfo crash on MacOS X + with port None or "0" and flags AI_NUMERICSERV. + +- Issue #16986: ElementTree now correctly works with string input when the + internal XML encoding is not UTF-8 or US-ASCII. + +- Issue #17996: socket module now exposes AF_LINK constant on BSD and OSX. + +- Issue #17900: Allowed pickling of recursive OrderedDicts. Decreased pickled + size and pickling time. + +- Issue #17914: Add os.cpu_count(). Patch by Yogesh Chaudhari, based on an + initial patch by Trent Nelson. + +- Issue #17812: Fixed quadratic complexity of base64.b32encode(). + Optimize base64.b32encode() and base64.b32decode() (speed up to 3x). + +- Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of + service using certificates with many wildcards (CVE-2013-2099). + +- Issue #15758: Fix FileIO.readall() so it no longer has O(n**2) complexity. + +- Issue #14596: The struct.Struct() objects now use a more compact + implementation. + +- Issue #17981: logging's SysLogHandler now closes the socket when it catches + socket OSErrors. + +- Issue #17964: Fix os.sysconf(): the return type of the C sysconf() function + is long, not int. + +- Fix typos in the multiprocessing module. + +- Issue #17754: Make ctypes.util.find_library() independent of the locale. + +- Issue #17968: Fix memory leak in os.listxattr(). + +- Issue #17606: Fixed support of encoded byte strings in the XMLGenerator + characters() and ignorableWhitespace() methods. Original patch by Sebastian + Ortiz Vasquez. + +- Issue #17732: Ignore distutils.cfg options pertaining to install paths if a + virtual environment is active. + +- Issue #17915: Fix interoperability of xml.sax with file objects returned by + codecs.open(). + +- Issue #16601: Restarting iteration over tarfile really restarts rather + than continuing from where it left off. Patch by Michael Birtwell. + +- Issue #17289: The readline module now plays nicer with external modules + or applications changing the rl_completer_word_break_characters global + variable. Initial patch by Bradley Froehle. + +- Issue #12181: select module: Fix struct kevent definition on OpenBSD 64-bit + platforms. Patch by Federico Schwindt. + +- Issue #11816: multiple improvements to the dis module: get_instructions + generator, ability to redirect output to a file, Bytecode and Instruction + abstractions. Patch by Nick Coghlan, Ryan Kelly and Thomas Kluyver. + +- Issue #13831: Embed stringification of remote traceback in local + traceback raised when pool task raises an exception. + +- Issue #15528: Add weakref.finalize to support finalization using + weakref callbacks. + +- Issue #14173: Avoid crashing when reading a signal handler during + interpreter shutdown. + +- Issue #15902: Fix imp.load_module() accepting None as a file when loading an + extension module. + +- Issue #13721: SSLSocket.getpeercert() and SSLSocket.do_handshake() now + raise an OSError with ENOTCONN, instead of an AttributeError, when the + SSLSocket is not connected. + +- Issue #14679: add an __all__ (that contains only HTMLParser) to html.parser. + +- Issue #17802: Fix an UnboundLocalError in html.parser. Initial tests by + Thomas Barlow. + +- Issue #17358: Modules loaded by imp.load_source() and load_compiled() (and by + extension load_module()) now have a better chance of working when reloaded. + +- Issue #17804: New function ``struct.iter_unpack`` allows for streaming + struct unpacking. + +- Issue #17830: When keyword.py is used to update a keyword file, it now + preserves the line endings of the original file. + +- Issue #17272: Making the urllib.request's Request.full_url a descriptor. + Fixes bugs with assignment to full_url. Patch by Demian Brecht. + +- Issue #17353: Plistlib emitted empty data tags with deeply nested datastructures + +- Issue #11714: Use 'with' statements to assure a Semaphore releases a + condition variable. Original patch by Thomas Rachel. + +- Issue #16624: `subprocess.check_output` now accepts an `input` argument, + allowing the subprocess's stdin to be provided as a (byte) string. + Patch by Zack Weinberg. + +- Issue #17795: Reverted backwards-incompatible change in SysLogHandler with + Unix domain sockets. + +- Issue #16694: Add a pure Python implementation of the operator module. + Patch by Zachary Ware. + +- Issue #11182: remove the unused and undocumented pydoc.Scanner class. + Patch by Martin Morrison. + +- Issue #17741: Add ElementTree.XMLPullParser, an event-driven parser for + non-blocking applications. + +- Issue #17555: Fix ForkAwareThreadLock so that size of after fork + registry does not grow exponentially with generation of process. + +- Issue #17707: fix regression in multiprocessing.Queue's get() method where + it did not block for short timeouts. + +- Issue #17720: Fix the Python implementation of pickle.Unpickler to correctly + process the APPENDS opcode when it is used on non-list objects. + +- Issue #17012: shutil.which() no longer falls back to the PATH environment + variable if an empty path argument is specified. Patch by Serhiy Storchaka. + +- Issue #17710: Fix pickle raising a SystemError on bogus input. + +- Issue #17341: Include the invalid name in the error messages from re about + invalid group names. + +- Issue #17702: os.environ now raises KeyError with the original environment + variable name (str on UNIX), instead of using the encoded name (bytes on + UNIX). + +- Issue #16163: Make the importlib based version of pkgutil.iter_importers + work for submodules. Initial patch by Berker Peksag. + +- Issue #16804: Fix a bug in the 'site' module that caused running + 'python -S -m site' to incorrectly throw an exception. + +- Issue #15480: Remove the deprecated and unused TYPE_INT64 code from marshal. + Initial patch by Daniel Riti. + +- Issue #2118: SMTPException is now a subclass of OSError. + +- Issue #17016: Get rid of possible pointer wraparounds and integer overflows + in the re module. Patch by Nickolai Zeldovich. + +- Issue #16658: add missing return to HTTPConnection.send(). + Patch by Jeff Knupp. + +- Issue #9556: the logging package now allows specifying a time-of-day for a + TimedRotatingFileHandler to rotate. + +- Issue #14971: unittest test discovery no longer gets confused when a function + has a different __name__ than its name in the TestCase class dictionary. + +- Issue #17487: The wave getparams method now returns a namedtuple rather than + a plain tuple. + +- Issue #17675: socket repr() provides local and remote addresses (if any). + Patch by Giampaolo Rodola' + +- Issue #17093: Make the ABCs in importlib.abc provide default values or raise + reasonable exceptions for their methods to make them more amenable to super() + calls. + +- Issue #17566: Make importlib.abc.Loader.module_repr() optional instead of an + abstractmethod; now it raises NotImplementedError so as to be ignored by default. + +- Issue #17678: Remove the use of deprecated method in http/cookiejar.py by + changing the call to get_origin_req_host() to origin_req_host. + +- Issue #17666: Fix reading gzip files with an extra field. + +- Issue #16475: Support object instancing, recursion and interned strings + in marshal + +- Issue #17502: Process DEFAULT values in mock side_effect that returns iterator. + +- Issue #16795: On the ast.arguments object, unify vararg with varargannotation + and kwarg and kwargannotation. Change the column offset of ast.Attribute to be + at the attribute name. + +- Issue #17434: Properly raise a SyntaxError when a string occurs between future + imports. + +- Issue #17117: Import and @importlib.util.set_loader now set __loader__ when + it has a value of None or the attribute doesn't exist. + +- Issue #17032: The "global" in the "NameError: global name 'x' is not defined" + error message has been removed. Patch by Ram Rachum. + +- Issue #18080: When building a C extension module on OS X, if the compiler + is overridden with the CC environment variable, use the new compiler as + the default for linking if LDSHARED is not also overridden. This restores + Distutils behavior introduced in 3.2.3 and inadvertently dropped in 3.3.0. + +- Issue #18113: Fixed a refcount leak in the curses.panel module's + set_userptr() method. Reported by Atsuo Ishimoto. + +- Implement PEP 443 "Single-dispatch generic functions". + +- Implement PEP 435 "Adding an Enum type to the Python standard library". + +- Issue #15596: Faster pickling of unicode strings. + +- Issue #17572: Avoid chained exceptions when passing bad directives to + time.strptime(). Initial patch by Claudiu Popa. + +- Issue #17435: threading.Timer's __init__ method no longer uses mutable + default values for the args and kwargs parameters. + +- Issue #17526: fix an IndexError raised while passing code without filename to + inspect.findsource(). Initial patch by Tyler Doyle. + +- Issue #17540: Added style parameter to logging formatter configuration by dict. + +- Issue #16692: The ssl module now supports TLS 1.1 and TLS 1.2. Initial + patch by Michele Orrù. + +- Issue #17025: multiprocessing: Reduce Queue and SimpleQueue contention. + +- Issue #17536: Add to webbrowser's browser list: www-browser, x-www-browser, + iceweasel, iceape. + +- Issue #17150: pprint now uses line continuations to wrap long string + literals. + +- Issue #17488: Change the subprocess.Popen bufsize parameter default value + from unbuffered (0) to buffering (-1) to match the behavior existing code + expects and match the behavior of the subprocess module in Python 2 to avoid + introducing hard to track down bugs. + +- Issue #17521: Corrected non-enabling of logger following two calls to + fileConfig(). + +- Issue #17508: Corrected logging MemoryHandler configuration in dictConfig() + where the target handler wasn't configured first. + +- Issue #17209: curses.window.get_wch() now correctly handles KeyboardInterrupt + (CTRL+c). + +- Issue #5713: smtplib now handles 421 (closing connection) error codes when + sending mail by closing the socket and reporting the 421 error code via the + exception appropriate to the command that received the error response. + +- Issue #16997: unittest.TestCase now provides a subTest() context manager + to procedurally generate, in an easy way, small test instances. + +- Issue #17485: Also delete the Request Content-Length header if the data + attribute is deleted. (Follow on to issue Issue #16464). + +- Issue #15927: CVS now correctly parses escaped newlines and carriage + when parsing with quoting turned off. + +- Issue #17467: add readline and readlines support to mock_open in + unittest.mock. + +- Issue #13248: removed deprecated and undocumented difflib.isbjunk, + isbpopular. + +- Issue #17192: Update the ctypes module's libffi to v3.0.13. This + specifically addresses a stack misalignment issue on x86 and issues on + some more recent platforms. + +- Issue #8862: Fixed curses cleanup when getkey is interrupted by a signal. + +- Issue #17443: imaplib.IMAP4_stream was using the default unbuffered IO + in subprocess, but the imap code assumes buffered IO. In Python2 this + worked by accident. IMAP4_stream now explicitly uses buffered IO. + +- Issue #17476: Fixed regression relative to Python2 in undocumented pydoc + 'allmethods'; it was missing unbound methods on the class. + +- Issue #17474: Remove the deprecated methods of Request class. + +- Issue #16709: unittest discover order is no-longer filesystem specific. Patch + by Jeff Ramnani. + +- Use the HTTPS PyPI url for upload, overriding any plain HTTP URL in pypirc. + +- Issue #5024: sndhdr.whichhdr now returns the frame count for WAV files + rather than -1. + +- Issue #17460: Remove the strict argument of HTTPConnection and removing the + DeprecationWarning being issued from 3.2 onwards. + +- Issue #16880: Do not assume _imp.load_dynamic() is defined in the imp module. + +- Issue #16389: Fixed a performance regression relative to Python 3.1 in the + caching of compiled regular expressions. + +- Added missing FeedParser and BytesFeedParser to email.parser.__all__. + +- Issue #17431: Fix missing import of BytesFeedParser in email.parser. + +- Issue #12921: http.server's send_error takes an explain argument to send more + information in response. Patch contributed by Karl. + +- Issue #17414: Add timeit, repeat, and default_timer to timeit.__all__. + +- Issue #1285086: Get rid of the refcounting hack and speed up + urllib.parse.unquote() and urllib.parse.unquote_to_bytes(). + +- Issue #17099: Have importlib.find_loader() raise ValueError when __loader__ + is not set, harmonizing with what happens when the attribute is set to None. + +- Expose the O_PATH constant in the os module if it is available. + +- Issue #17368: Fix an off-by-one error in the Python JSON decoder that caused + a failure while decoding empty object literals when object_pairs_hook was + specified. + +- Issue #17385: Fix quadratic behavior in threading.Condition. The FIFO + queue now uses a deque instead of a list. + +- Issue #15806: Add contextlib.ignore(). This creates a context manager to + ignore specified exceptions, replacing the "except SomeException: pass" idiom. + +- Issue #14645: The email generator classes now produce output using the + specified linesep throughout. Previously if the prolog, epilog, or + body were stored with a different linesep, that linesep was used. This + fix corrects an RFC non-compliance issue with smtplib.send_message. + +- Issue #17278: Fix a crash in heapq.heappush() and heapq.heappop() when + the list is being resized concurrently. + +- Issue #16962: Use getdents64 instead of the obsolete getdents syscall + in the subprocess module on Linux. + +- Issue #16935: unittest now counts the module as skipped if it raises SkipTest, + instead of counting it as an error. Patch by Zachary Ware. + +- Issue #17018: Make Process.join() retry if os.waitpid() fails with EINTR. + +- Issue #17223: array module: Fix a crasher when converting an array containing + invalid characters (outside range [U+0000; U+10ffff]) to Unicode: + repr(array), str(array) and array.tounicode(). Patch written by Manuel Jacob. + +- Issue #17197: profile/cProfile modules refactored so that code of run() and + runctx() utility functions is not duplicated in both modules. + +- Issue #14720: sqlite3: Convert datetime microseconds correctly. + Patch by Lowe Thiderman. + +- Issue #15132: Allow a list for the defaultTest argument of + unittest.TestProgram. Patch by Jyrki Pulliainen. + +- Issue #17225: JSON decoder now counts columns in the first line starting + with 1, as in other lines. + +- Issue #6623: Added explicit DeprecationWarning for ftplib.netrc, which has + been deprecated and undocumented for a long time. + +- Issue #13700: Fix byte/string handling in imaplib authentication when an + authobject is specified. + +- Issue #13153: Tkinter functions now raise TclError instead of ValueError when + a string argument contains non-BMP character. + +- Issue #9669: Protect re against infinite loops on zero-width matching in + non-greedy repeat. Patch by Matthew Barnett. + +- Issue #13169: The maximal repetition number in a regular expression has been + increased from 65534 to 2147483647 (on 32-bit platform) or 4294967294 (on + 64-bit). + +- Issue #17143: Fix a missing import in the trace module. Initial patch by + Berker Peksag. + +- Issue #15220: email.feedparser's line splitting algorithm is now simpler and + faster. + +- Issue #16743: Fix mmap overflow check on 32 bit Windows. + +- Issue #16996: webbrowser module now uses shutil.which() to find a + web-browser on the executable search path. + +- Issue #16800: tempfile.gettempdir() no longer left temporary files when + the disk is full. Original patch by Amir Szekely. + +- Issue #17192: Import libffi-3.0.12. + +- Issue #16564: Fixed regression relative to Python2 in the operation of + email.encoders.encode_7or8bit when used with binary data. + +- Issue #17052: unittest discovery should use self.testLoader. + +- Issue #4591: Uid and gid values larger than 2**31 are supported now. + +- Issue #17141: random.vonmisesvariate() no longer hangs for large kappas. + +- Issue #17149: Fix random.vonmisesvariate to always return results in + [0, 2*math.pi]. + +- Issue #1470548: XMLGenerator now works with binary output streams. + +- Issue #6975: os.path.realpath() now correctly resolves multiple nested + symlinks on POSIX platforms. + +- Issue #13773: sqlite3.connect() gets a new `uri` parameter to pass the + filename as a URI, allowing custom options to be passed. + +- Issue #16564: Fixed regression relative to Python2 in the operation of + email.encoders.encode_noop when used with binary data. + +- Issue #10355: The mode, name, encoding and newlines properties now work on + SpooledTemporaryFile objects even when they have not yet rolled over. + Obsolete method xreadline (which has never worked in Python 3) has been + removed. + +- Issue #16686: Fixed a lot of bugs in audioop module. Fixed crashes in + avgpp(), maxpp() and ratecv(). Fixed an integer overflow in add(), bias(), + and ratecv(). reverse(), lin2lin() and ratecv() no more lose precision for + 32-bit samples. max() and rms() no more returns a negative result and + various other functions now work correctly with 32-bit sample -0x80000000. + +- Issue #17073: Fix some integer overflows in sqlite3 module. + +- Issue #16723: httplib.HTTPResponse no longer marked closed when the connection + is automatically closed. + +- Issue #15359: Add CAN_BCM protocol support to the socket module. Patch by + Brian Thorne. + +- Issue #16948: Fix quoted printable body encoding for non-latin1 character + sets in the email package. + +- Issue #16811: Fix folding of headers with no value in the provisional email + policies. + +- Issue #17132: Update symbol for "yield from" grammar changes. + +- Issue #17076: Make copying of xattrs more tolerant of missing FS support. + Patch by Thomas Wouters. + +- Issue #17089: Expat parser now correctly works with string input when the + internal XML encoding is not UTF-8 or US-ASCII. It also now accepts bytes + and strings larger than 2 GiB. + +- Issue #6083: Fix multiple segmentation faults occurred when PyArg_ParseTuple + parses nested mutating sequence. + +- Issue #5289: Fix ctypes.util.find_library on Solaris. + +- Issue #17106: Fix a segmentation fault in io.TextIOWrapper when an underlying + stream or a decoder produces data of an unexpected type (i.e. when + io.TextIOWrapper initialized with text stream or use bytes-to-bytes codec). + +- Issue #17015: When it has a spec, a Mock object now inspects its signature + when matching calls, so that arguments can be matched positionally or + by name. + +- Issue #15633: httplib.HTTPResponse is now mark closed when the server + sends less than the advertised Content-Length. + +- Issue #12268: The io module file object write methods no longer abort early + when one of its write system calls is interrupted (EINTR). + +- Issue #6972: The zipfile module no longer overwrites files outside of + its destination path when extracting malicious zip files. + +- Issue #4844: ZipFile now raises BadZipFile when opens a ZIP file with an + incomplete "End of Central Directory" record. Original patch by Guilherme + Polo and Alan McIntyre. + +- Issue #17071: Signature.bind() now works when one of the keyword arguments + is named ``self``. + +- Issue #12004: Fix an internal error in PyZipFile when writing an invalid + Python file. Patch by Ben Morgan. + +- Have py_compile use importlib as much as possible to avoid code duplication. + Code now raises FileExistsError if the file path to be used for the + byte-compiled file is a symlink or non-regular file as a warning that import + will not keep the file path type if it writes to that path. + +- Issue #16972: Have site.addpackage() consider already known paths even when + none are explicitly passed in. Bug report and fix by Kirill. + +- Issue #1602133: on Mac OS X a shared library build (``--enable-shared``) + now fills the ``os.environ`` variable correctly. + +- Issue #15505: `unittest.installHandler` no longer assumes SIGINT handler is + set to a callable object. + +- Issue #13454: Fix a crash when deleting an iterator created by itertools.tee() + if all other iterators were very advanced before. + +- Issue #12411: Fix to cgi.parse_multipart to correctly use bytes boundaries + and bytes data. Patch by Jonas Wagner. + +- Issue #16957: shutil.which() no longer searches a bare file name in the + current directory on Unix and no longer searches a relative file path with + a directory part in PATH directories. Patch by Thomas Kluyver. + +- Issue #1159051: GzipFile now raises EOFError when reading a corrupted file + with truncated header or footer. + +- Issue #16993: shutil.which() now preserves the case of the path and extension + on Windows. + +- Issue #16992: On Windows in signal.set_wakeup_fd, validate the file + descriptor argument. + +- Issue #16422: For compatibility with the Python version, the C version of + decimal now uses strings instead of integers for rounding mode constants. + +- Issue #15861: tkinter now correctly works with lists and tuples containing + strings with whitespaces, backslashes or unbalanced braces. + +- Issue #9720: zipfile now writes correct local headers for files larger than + 4 GiB. + +- Issue #16955: Fix the poll() method for multiprocessing's socket + connections on Windows. + +- SSLContext.load_dh_params() now properly closes the input file. + +- Issue #15031: Refactor some .pyc management code to cut down on code + duplication. Thanks to Ronan Lamy for the report and taking an initial stab + at the problem. + +- Issue #16398: Optimize deque.rotate() so that it only moves pointers + and doesn't touch the underlying data with increfs and decrefs. + +- Issue #16900: Issue a ResourceWarning when an ssl socket is left unclosed. + +- Issue #13899: ``\A``, ``\Z``, and ``\B`` now correctly match the A, Z, + and B literals when used inside character classes (e.g. ``'[\A]'``). + Patch by Matthew Barnett. + +- Issue #15545: Fix regression in sqlite3's iterdump method where it was + failing if the connection used a row factory (such as sqlite3.Row) that + produced unsortable objects. (Regression was introduced by fix for 9750). + +- fcntl: add F_DUPFD_CLOEXEC constant, available on Linux 2.6.24+. + +- Issue #15972: Fix error messages when os functions expecting a file name or + file descriptor receive the incorrect type. + +- Issue #8109: The ssl module now has support for server-side SNI, thanks + to a :meth:`SSLContext.set_servername_callback` method. Patch by Daniel + Black. + +- Issue #16860: In tempfile, use O_CLOEXEC when available to set the + close-on-exec flag atomically. + +- Issue #16674: random.getrandbits() is now 20-40% faster for small integers. + +- Issue #16009: JSON error messages now provide more information. + +- Issue #16828: Fix error incorrectly raised by bz2.compress(b'') and + bz2.BZ2Compressor.compress(b''). Initial patch by Martin Packman. + +- Issue #16833: In http.client.HTTPConnection, do not concatenate the request + headers and body when the payload exceeds 16 KB, since it can consume more + memory for no benefit. Patch by Benno Leslie. + +- Issue #16541: tk_setPalette() now works with keyword arguments. + +- Issue #16820: In configparser, `parser.popitem()` no longer raises ValueError. + This makes `parser.clean()` work correctly. + +- Issue #16820: In configparser, ``parser['section'] = {}`` now preserves + section order within the parser. This makes `parser.update()` preserve section + order as well. + +- Issue #16820: In configparser, ``parser['DEFAULT'] = {}`` now correctly + clears previous values stored in the default section. Same goes for + ``parser.update({'DEFAULT': {}})``. + +- Issue #9586: Redefine SEM_FAILED on MacOSX to keep compiler happy. + +- Issue #16787: Increase asyncore and asynchat default output buffers size, to + decrease CPU usage and increase throughput. + +- Issue #10527: make multiprocessing use poll() instead of select() if available. + +- Issue #16688: Now regexes contained backreferences correctly work with + non-ASCII strings. Patch by Matthew Barnett. + +- Issue #16486: Make aifc files act as context managers. + +- Issue #16485: Now file descriptors are closed if file header patching failed + on closing an aifc file. + +- Issue #16640: Run less code under a lock in sched module. + +- Issue #16165: sched.scheduler.run() no longer blocks a scheduler for other + threads. + +- Issue #16641: Default values of sched.scheduler.enter() are no longer + modifiable. + +- Issue #16618: Make glob.glob match consistently across strings and bytes + regarding leading dots. Patch by Serhiy Storchaka. + +- Issue #16788: Add samestat to Lib/ntpath.py + +- Issue #16713: Parsing of 'tel' urls using urlparse separates params from + path. + +- Issue #16443: Add docstrings to regular expression match objects. + Patch by Anton Kasyanov. + +- Issue #15701: Fix HTTPError info method call to return the headers information. + +- Issue #16752: Add a missing import to modulefinder. Patch by Berker Peksag. + +- Issue #16646: ftplib.FTP.makeport() might lose socket error details. + (patch by Serhiy Storchaka) + +- Issue #16626: Fix infinite recursion in glob.glob() on Windows when the + pattern contains a wildcard in the drive or UNC path. Patch by Serhiy + Storchaka. + +- Issue #15783: Except for the number methods, the C version of decimal now + supports all None default values present in decimal.py. These values were + largely undocumented. + +- Issue #11175: argparse.FileType now accepts encoding and errors + arguments. Patch by Lucas Maystre. + +- Issue #16488: epoll() objects now support the `with` statement. Patch + by Serhiy Storchaka. + +- Issue #16298: In HTTPResponse.read(), close the socket when there is no + Content-Length and the incoming stream is finished. Patch by Eran + Rundstein. + +- Issue #16049: Add abc.ABC class to enable the use of inheritance to create + ABCs, rather than the more cumbersome metaclass=ABCMeta. Patch by Bruno + Dupuis. + +- Expose the TCP_FASTOPEN and MSG_FASTOPEN flags in socket when they're + available. + +- Issue #15701: Add a .headers attribute to urllib.error.HTTPError. Patch + contributed by Berker Peksag. + +- Issue #15872: Fix 3.3 regression introduced by the new fd-based shutil.rmtree + that caused it to not ignore certain errors when ignore_errors was set. + Patch by Alessandro Moura and Serhiy Storchaka. + +- Issue #16248: Disable code execution from the user's home directory by + tkinter when the -E flag is passed to Python. Patch by Zachary Ware. + +- Issue #13390: New function :func:`sys.getallocatedblocks()` returns the + number of memory blocks currently allocated. + +- Issue #16628: Fix a memory leak in ctypes.resize(). + +- Issue #13614: Fix setup.py register failure with invalid rst in description. + Patch by Julien Courteau and Pierre Paul Lefebvre. + +- Issue #13512: Create ~/.pypirc securely (CVE-2011-4944). Initial patch by + Philip Jenvey, tested by Mageia and Debian. + +- Issue #7719: Make distutils ignore ``.nfs*`` files instead of choking later + on. Initial patch by SilentGhost and Jeff Ramnani. + +- Issue #13120: Allow calling pdb.set_trace() from thread. + Patch by Ilya Sandler. + +- Issue #16585: Make CJK encoders support error handlers that return bytes per + PEP 383. + +- Issue #10182: The re module doesn't truncate indices to 32 bits anymore. + Patch by Serhiy Storchaka. + +- Issue #16333: use (",", ": ") as default separator in json when indent is + specified, to avoid trailing whitespace. Patch by Serhiy Storchaka. + +- Issue #16573: In 2to3, treat enumerate() like a consuming call, so superfluous + list() calls aren't added to filter(), map(), and zip() which are directly + passed enumerate(). + +- Issue #16464: Reset the Content-Length header when a urllib Request is reused + with new data. + +- Issue #12848: The pure Python pickle implementation now treats object + lengths as unsigned 32-bit integers, like the C implementation does. + Patch by Serhiy Storchaka. + +- Issue #16423: urllib.request now has support for ``data:`` URLs. Patch by + Mathias Panzenböck. + +- Issue #4473: Add a POP3.stls() to switch a clear-text POP3 session into + an encrypted POP3 session, on supported servers. Patch by Lorenzo Catucci. + +- Issue #4473: Add a POP3.capa() method to query the capabilities advertised + by the POP3 server. Patch by Lorenzo Catucci. + +- Issue #4473: Ensure the socket is shutdown cleanly in POP3.close(). + Patch by Lorenzo Catucci. + +- Issue #16522: added FAIL_FAST flag to doctest. + +- Issue #15627: Add the importlib.abc.InspectLoader.source_to_code() method. + +- Issue #16408: Fix file descriptors not being closed in error conditions + in the zipfile module. Patch by Serhiy Storchaka. + +- Issue #14631: Add a new :class:`weakref.WeakMethod` to simulate weak + references to bound methods. + +- Issue #16469: Fix exceptions from float -> Fraction and Decimal -> Fraction + conversions for special values to be consistent with those for float -> int + and Decimal -> int. Patch by Alexey Kachayev. + +- Issue #16481: multiprocessing no longer leaks process handles on Windows. + +- Issue #12428: Add a pure Python implementation of functools.partial(). + Patch by Brian Thorne. + +- Issue #16140: The subprocess module no longer double closes its child + subprocess.PIPE parent file descriptors on child error prior to exec(). + +- Remove a bare print to stdout from the subprocess module that could have + happened if the child process wrote garbage to its pre-exec error pipe. + +- The subprocess module now raises its own SubprocessError instead of a + RuntimeError in various error situations which should not normally happen. + +- Issue #16327: The subprocess module no longer leaks file descriptors + used for stdin/stdout/stderr pipes to the child when fork() fails. + +- Issue #14396: Handle the odd rare case of waitpid returning 0 when not + expected in subprocess.Popen.wait(). + +- Issue #16411: Fix a bug where zlib.decompressobj().flush() might try to access + previously-freed memory. Patch by Serhiy Storchaka. + +- Issue #16357: fix calling accept() on a SSLSocket created through + SSLContext.wrap_socket(). Original patch by Jeff McNeil. + +- Issue #16409: The reporthook callback made by the legacy + urllib.request.urlretrieve API now properly supplies a constant non-zero + block_size as it did in Python 3.2 and 2.7. This matches the behavior of + urllib.request.URLopener.retrieve. + +- Issue #16431: Use the type information when constructing a Decimal subtype + from a Decimal argument. + +- Issue #15641: Clean up deprecated classes from importlib. + Patch by Taras Lyapun. + +- Issue #16350: zlib.decompressobj().decompress() now accumulates data from + successive calls after EOF in unused_data, instead of only saving the argument + to the last call. decompressobj().flush() now correctly sets unused_data and + unconsumed_tail. A bug in the handling of MemoryError when setting the + unconsumed_tail attribute has also been fixed. Patch by Serhiy Storchaka. + +- Issue #12759: sre_parse now raises a proper error when the name of the group + is missing. Initial patch by Serhiy Storchaka. + +- Issue #16152: fix tokenize to ignore whitespace at the end of the code when + no newline is found. Patch by Ned Batchelder. + +- Issue #16284: Prevent keeping unnecessary references to worker functions + in concurrent.futures ThreadPoolExecutor. + +- Issue #16230: Fix a crash in select.select() when one of the lists changes + size while iterated on. Patch by Serhiy Storchaka. + +- Issue #16228: Fix a crash in the json module where a list changes size + while it is being encoded. Patch by Serhiy Storchaka. + +- Issue #16351: New function gc.get_stats() returns per-generation collection + statistics. + +- Issue #14897: Enhance error messages of struct.pack and + struct.pack_into. Patch by Matti Mäki. + +- Issue #16316: mimetypes now recognizes the .xz and .txz (.tar.xz) extensions. + Patch by Serhiy Storchaka. + +- Issue #12890: cgitb no longer prints spurious <p> tags in text + mode when the logdir option is specified. + +- Issue #16307: Fix multiprocessing.Pool.map_async not calling its callbacks. + Patch by Janne Karila. + +- Issue #16305: Fix a segmentation fault occurring when interrupting + math.factorial. + +- Issue #16116: Fix include and library paths to be correct when building C + extensions in venvs. + +- Issue #16245: Fix the value of a few entities in html.entities.html5. + +- Issue #16301: Fix the localhost verification in urllib/request.py for ``file://`` + urls. + +- Issue #16250: Fix the invocations of URLError which had misplaced filename + attribute for exception. + +- Issue #10836: Fix exception raised when file not found in urlretrieve + Initial patch by Ezio Melotti. + +- Issue #14398: Fix size truncation and overflow bugs in the bz2 module. + +- Issue #12692: Fix resource leak in urllib.request when talking to an HTTP + server that does not include a ``Connection: close`` header in its responses. + +- Issue #12034: Fix bogus caching of result in check_GetFinalPathNameByHandle. + Patch by Atsuo Ishimoto. + +- Improve performance of `lzma.LZMAFile` (see also issue #16034). + +- Issue #16220: wsgiref now always calls close() on an iterable response. + Patch by Brent Tubbs. + +- Issue #16270: urllib may hang when used for retrieving files via FTP by using + a context manager. Patch by Giampaolo Rodola'. + +- Issue #16461: Wave library should be able to deal with 4GB wav files, + and sample rate of 44100 Hz. + +- Issue #16176: Properly identify Windows 8 via platform.platform() + +- Issue #16088: BaseHTTPRequestHandler's send_error method includes a + Content-Length header in its response now. Patch by Antoine Pitrou. + +- Issue #16114: The subprocess module no longer provides a misleading error + message stating that args[0] did not exist when either the cwd or executable + keyword arguments specified a path that did not exist. + +- Issue #16169: Fix ctypes.WinError()'s confusion between errno and winerror. + +- Issue #16110: logging.fileConfig now accepts a pre-initialised ConfigParser + instance. + +- Issue #1492704: shutil.copyfile() raises a distinct SameFileError now if + source and destination are the same file. Patch by Atsuo Ishimoto. + +- Issue #13896: Make shelf instances work with 'with' as context managers. + Original patch by Filip Gruszczyński. + +- Issue #15417: Add support for csh and fish in venv activation scripts. + +- Issue #14377: ElementTree.write and some of the module-level functions have + a new parameter - *short_empty_elements*. It controls how elements with no + contents are emitted. + +- Issue #16089: Allow ElementTree.TreeBuilder to work again with a non-Element + element_factory (fixes a regression in SimpleTAL). + +- Issue #9650: List commonly used format codes in time.strftime and + time.strptime docsttings. Original patch by Mike Hoy. + +- Issue #15452: logging configuration socket listener now has a verify option + that allows an application to apply a verification function to the + received configuration data before it is acted upon. + +- Issue #16034: Fix performance regressions in the new `bz2.BZ2File` + implementation. Initial patch by Serhiy Storchaka. + +- `pty.spawn()` now returns the child process status returned by `os.waitpid()`. + +- Issue #15756: `subprocess.poll()` now properly handles `errno.ECHILD` to + return a returncode of 0 when the child has already exited or cannot be waited + on. + +- Issue #15323: Improve failure message of `Mock.assert_called_once_with()`. + +- Issue #16064: ``unittest -m`` claims executable is "python", not "python3". + +- Issue #12376: Pass on parameters in `TextTestResult.__init__()` super call. + +- Issue #15222: Insert blank line after each message in mbox mailboxes. + +- Issue #16013: Fix `csv.Reader` parsing issue with ending quote characters. + Patch by Serhiy Storchaka. + +- Issue #15421: Fix an OverflowError in `Calendar.itermonthdates()` after + `datetime.MAXYEAR`. Patch by Cédric Krier. + +- Issue #16112: platform.architecture does not correctly escape argument to + /usr/bin/file. Patch by David Benjamin. + +- Issue #15970: `xml.etree.ElementTree` now serializes correctly the empty HTML + elements 'meta' and 'param'. + +- Issue #15842: The `SocketIO.{readable,writable,seekable}` methods now raise + ValueError when the file-like object is closed. Patch by Alessandro Moura. + +- Issue #15876: Fix a refleak in the `curses` module: window.encoding. + +- Issue #15881: Fix `atexit` hook in `multiprocessing`. Original patch by Chris + McDonough. + +- Issue #15841: The readable(), writable() and seekable() methods of + `io.BytesIO` and `io.StringIO` objects now raise ValueError when the object + has been closed. Patch by Alessandro Moura. + +- Issue #15447: Use `subprocess.DEVNULL` in webbrowser, instead of opening + `os.devnull` explicitly and leaving it open. + +- Issue #15509: `webbrowser.UnixBrowser` no longer passes empty arguments to + Popen when ``%action`` substitutions produce empty strings. + +- Issue #12776, issue #11839: Call `argparse` type function (specified by + add_argument) only once. Before, the type function was called twice in the + case where the default was specified and the argument was given as well. This + was especially problematic for the FileType type, as a default file would + always be opened, even if a file argument was specified on the command line. + +- Issue #15906: Fix a regression in argparse caused by the preceding change, + when ``action='append'``, ``type='str'`` and ``default=[]``. + +- Issue #16113: Added sha3 module based on the Keccak reference implementation + 3.2. The `hashlib` module has four additional hash algorithms: `sha3_224`, + `sha3_256`, `sha3_384` and `sha3_512`. As part of the patch some common + code was moved from _hashopenssl.c to hashlib.h. + +- ctypes.call_commethod was removed, since its only usage was in the defunct + samples directory. + +- Issue #16692: Added TLSv1.1 and TLSv1.2 support for the ssl modules. + +- Issue #16832: add abc.get_cache_token() to expose cache validity checking + support in ABCMeta. + +IDLE +---- + +- Issue #18429: Format / Format Paragraph, now works when comment blocks + are selected. As with text blocks, this works best when the selection + only includes complete lines. + +- Issue #18226: Add docstrings and unittests for FormatParagraph.py. + Original patches by Todd Rovito and Phil Webster. + +- Issue #18279: Format - Strip trailing whitespace no longer marks a file as + changed when it has not been changed. This fix followed the addition of a + test file originally written by Phil Webster (the issue's main goal). + +- Issue #7136: In the Idle File menu, "New Window" is renamed "New File". + Patch by Tal Einat, Roget Serwy, and Todd Rovito. + +- Remove dead imports of imp. + +- Issue #18196: Avoid displaying spurious SystemExit tracebacks. + +- Issue #5492: Avoid traceback when exiting IDLE caused by a race condition. + +- Issue #17511: Keep IDLE find dialog open after clicking "Find Next". + Original patch by Sarah K. + +- Issue #18055: Move IDLE off of imp and on to importlib. + +- Issue #15392: Create a unittest framework for IDLE. + Initial patch by Rajagopalasarma Jayakrishnan. + See Lib/idlelib/idle_test/README.txt for how to run Idle tests. + +- Issue #14146: Highlight source line while debugging on Windows. + +- Issue #17838: Allow sys.stdin to be reassigned. + +- Issue #13495: Avoid loading the color delegator twice in IDLE. + +- Issue #17798: Allow IDLE to edit new files when specified on command line. + +- Issue #14735: Update IDLE docs to omit "Control-z on Windows". + +- Issue #17532: Always include Options menu for IDLE on OS X. + Patch by Guilherme Simões. + +- Issue #17585: Fixed IDLE regression. Now closes when using exit() or quit(). + +- Issue #17657: Show full Tk version in IDLE's about dialog. + Patch by Todd Rovito. + +- Issue #17613: Prevent traceback when removing syntax colorizer in IDLE. + +- Issue #1207589: Backwards-compatibility patch for right-click menu in IDLE. + +- Issue #16887: IDLE now accepts Cancel in tabify/untabify dialog box. + +- Issue #17625: In IDLE, close the replace dialog after it is used. + +- Issue #14254: IDLE now handles readline correctly across shell restarts. + +- Issue #17614: IDLE no longer raises exception when quickly closing a file. + +- Issue #6698: IDLE now opens just an editor window when configured to do so. + +- Issue #8900: Using keyboard shortcuts in IDLE to open a file no longer + raises an exception. + +- Issue #6649: Fixed missing exit status in IDLE. Patch by Guilherme Polo. + +- Issue #17114: IDLE now uses non-strict config parser. + +- Issue #9290: In IDLE the sys.std* streams now implement io.TextIOBase + interface and support all mandatory methods and properties. + +- Issue #5066: Update IDLE docs. Patch by Todd Rovito. + +- Issue #16829: IDLE printing no longer fails if there are spaces or other + special characters in the file path. + +- Issue #16491: IDLE now prints chained exception tracebacks. + +- Issue #16819: IDLE method completion now correctly works for bytes literals. + +- Issue #16504: IDLE now catches SyntaxErrors raised by tokenizer. Patch by + Roger Serwy. + +- Issue #16511: Use default IDLE width and height if config param is not valid. + Patch Serhiy Storchaka. + +- Issue #1207589: Add Cut/Copy/Paste items to IDLE right click Context Menu. + Patch by Todd Rovito. + +- Issue #16123: IDLE - deprecate running without a subprocess. + Patch by Roger Serwy. + +Tests +----- + +- Issue #1666318: Add a test that shutil.copytree() retains directory + permissions. Patch by Catherine Devlin. + +- Issue #18273: move the tests in Lib/test/json_tests to Lib/test/test_json + and make them discoverable by unittest. Patch by Zachary Ware. + +- Fix a fcntl test case on KFreeBSD, Debian #708653 (Petr Salinger). + +- Issue #18396: Fix spurious test failure in test_signal on Windows when + faulthandler is enabled (Patch by Jeremy Kloth) + +- Issue #17046: Fix broken test_executable_without_cwd in test_subprocess. + +- Issue #15415: Add new temp_dir() and change_cwd() context managers to + test.support, and refactor temp_cwd() to use them. Patch by Chris Jerdonek. + +- Issue #15494: test.support is now a package rather than a module (Initial + patch by Indra Talip) + +- Issue #17944: test_zipfile now discoverable and uses subclassing to + generate tests for different compression types. Fixed a bug with skipping + some tests due to use of exhausted iterators. + +- Issue #18266: test_largefile now works with unittest test discovery and + supports running only selected tests. Patch by Zachary Ware. + +- Issue #17767: test_locale now works with unittest test discovery. + Original patch by Zachary Ware. + +- Issue #18375: Assume --randomize when --randseed is used for running the + testsuite. + +- Issue #11185: Fix test_wait4 under AIX. Patch by Sébastien Sablé. + +- Issue #18207: Fix test_ssl for some versions of OpenSSL that ignore seconds + in ASN1_TIME fields. + +- Issue #18094: test_uuid no longer reports skipped tests as passed. + +- Issue #17992: Add timeouts to asyncore and asynchat tests so that they won't + accidentally hang. + +- Issue #17833: Fix test_gdb failures seen on machines where debug symbols + for glibc are available (seen on PPC64 Linux). + +- Issue #7855: Add tests for ctypes/winreg for issues found in IronPython. + Initial patch by Dino Viehland. + +- Issue #11078: test___all__ now checks for duplicates in __all__. + Initial patch by R. David Murray. + +- Issue #17712: Fix test_gdb failures on Ubuntu 13.04. + +- Issue #17835: Fix test_io when the default OS pipe buffer size is larger + than one million bytes. + +- Issue #17065: Use process-unique key for winreg tests to avoid failures if + test is run multiple times in parallel (eg: on a buildbot host). + +- Issue #12820: add tests for the xml.dom.minicompat module. + Patch by John Chandler and Phil Connell. + +- Issue #17691: test_univnewlines now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17790: test_set now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17789: test_random now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17779: test_osx_env now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17766: test_iterlen now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17690: test_time now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17692: test_sqlite now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #11995: test_pydoc doesn't import all sys.path modules anymore. + +- Issue #17448: test_sax now skips if there are no xml parsers available + instead of raising an ImportError. + +- Issue #11420: make test suite pass with -B/DONTWRITEBYTECODE set. + Initial patch by Thomas Wouters. + +- Issue #10652: make tcl/tk tests run after __all__ test, patch by + Zachary Ware. + +- Issue #11963: remove human verification from test_parser and test_subprocess. + +- Issue #11732: add a new suppress_crash_popup() context manager to test.support + that disables crash popups on Windows and use it in test_faulthandler and + test_capi. + +- Issue #13898: test_ssl no longer prints a spurious stack trace on Ubuntu. + +- Issue #17283: Share code between `__main__.py` and `regrtest.py` in + `Lib/test`. + +- Issue #17249: convert a test in test_capi to use unittest and reap threads. + +- Issue #17107: Test client-side SNI support in urllib.request thanks to + the new server-side SNI support in the ssl module. Initial patch by + Daniel Black. + +- Issue #17041: Fix testing when Python is configured with the + --without-doc-strings. + +- Issue #16923: Fix ResourceWarnings in test_ssl. + +- Issue #15539: Added regression tests for Tools/scripts/pindent.py. + +- Issue #17479: test_io now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17066: test_robotparser now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17334: test_index now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17333: test_imaplib now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17082: test_dbm* now work with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17079: test_ctypes now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17304: test_hash now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17303: test_future* now work with unittest test discovery. + Patch by Zachary Ware. + +- Issue #17163: test_file now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #16925: test_configparser now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #16918: test_codecs now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #16919: test_crypt now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #16910: test_bytes, test_unicode, and test_userstring now work with + unittest test discovery. Patch by Zachary Ware. + +- Issue #16905: test_warnings now works with unittest test discovery. + Initial patch by Berker Peksag. + +- Issue #16898: test_bufio now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #16888: test_array now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #16896: test_asyncore now works with unittest test discovery. + Patch by Zachary Ware. + +- Issue #16897: test_bisect now works with unittest test discovery. + Initial patch by Zachary Ware. + +- Issue #16852: test_genericpath, test_posixpath, test_ntpath, and test_macpath + now work with unittest test discovery. Patch by Zachary Ware. + +- Issue #16748: test_heapq now works with unittest test discovery. + +- Issue #10646: Tests rearranged for os.samefile/samestat to check for not + just symlinks but also hard links. + +- Issue #15302: Switch regrtest from using getopt to using argparse. + +- Issue #15324: Fix regrtest parsing of --fromfile, --match, and --randomize + options. + +- Issue #16702: test_urllib2_localnet tests now correctly ignores proxies for + localhost tests. + +- Issue #16664: Add regression tests for glob's behaviour concerning entries + starting with a ".". Patch by Sebastian Kreft. + +- Issue #13390: The ``-R`` option to regrtest now also checks for memory + allocation leaks, using :func:`sys.getallocatedblocks()`. + +- Issue #16559: Add more tests for the json module, including some from the + official test suite at json.org. Patch by Serhiy Storchaka. + +- Issue #16661: Fix the `os.getgrouplist()` test by not assuming that it gives + the same output as :command:`id -G`. + +- Issue #16115: Add some tests for the executable argument to + subprocess.Popen(). Initial patch by Kushal Das. + +- Issue #16126: PyErr_Format format mismatch in _testcapimodule.c. + Patch by Serhiy Storchaka. + +- Issue #15304: Fix warning message when `os.chdir()` fails inside + `test.support.temp_cwd()`. Patch by Chris Jerdonek. + +- Issue #15802: Fix test logic in `TestMaildir.test_create_tmp()`. Patch by + Serhiy Storchaka. + +- Issue #15557: Added a test suite for the webbrowser module, thanks to Anton + Barkovsky. + +- Issue #16698: Skip posix test_getgroups when built with OS X + deployment target prior to 10.6. + +Build +----- + +- Issue #16067: Add description into MSI file to replace installer's + temporary name. + +- Issue #18257: Fix readlink usage in python-config. Install the python + version again on Darwin. + +- Issue #18481: Add C coverage reporting with gcov and lcov. A new make target + "coverage-report" creates an instrumented Python build, runs unit tests + and creates a HTML. The report can be updated with "make coverage-lcov". + +- Issue #17845: Clarified the message printed when some module are not built. + +- Issue #18256: Compilation fix for recent AIX releases. Patch by + David Edelsohn. + +- Issue #17547: In configure, explicitly pass -Wformat for the benefit for GCC + 4.8. + +- Issue #15172: Document NASM 2.10+ as requirement for building OpenSSL 1.0.1 + on Windows. + +- Issue #17591: Use lowercase filenames when including Windows header files. + Patch by Roumen Petrov. + +- Issue #17550: Fix the --enable-profiling configure switch. + +- Issue #17425: Build with openssl 1.0.1d on Windows. + +- Issue #16754: Fix the incorrect shared library extension on linux. Introduce + two makefile macros SHLIB_SUFFIX and EXT_SUFFIX. SO now has the value of + SHLIB_SUFFIX again (as in 2.x and 3.1). The SO macro is removed in 3.4. + +- Issue #5033: Fix building of the sqlite3 extension module when the + SQLite library version has "beta" in it. Patch by Andreas Pelme. + +- Issue #17228: Fix building without pymalloc. + +- Issue #3718: Use AC_ARG_VAR to set MACHDEP in configure.ac. + +- Issue #16235: Implement python-config as a shell script. + +- Issue #16769: Remove outdated Visual Studio projects. + +- Issue #17031: Fix running regen in cross builds. + +- Issue #3754: fix typo in pthread AC_CACHE_VAL. + +- Issue #15484: Fix _PYTHON_PROJECT_BASE for srcdir != builddir builds; + use _PYTHON_PROJECT_BASE in distutils/sysconfig.py. + +- Drop support for Windows 2000 (changeset e52df05b496a). + +- Issue #17029: Let h2py search the multiarch system include directory. + +- Issue #16953: Fix socket module compilation on platforms with + HAVE_BROKEN_POLL. Patch by Jeffrey Armstrong. + +- Issue #16320: Remove redundant Makefile dependencies for strings and bytes. + +- Cross compiling needs host and build settings. configure no longer + creates a broken PYTHON_FOR_BUILD variable when --build is missing. + +- Fix cross compiling issue in setup.py, ensure that lib_dirs and inc_dirs are + defined in cross compiling mode, too. + +- Issue #16836: Enable IPv6 support even if IPv6 is disabled on the build host. + +- Issue #16593: Have BSD 'make -s' do the right thing, thanks to Daniel Shahaf + +- Issue #16262: fix out-of-src-tree builds, if mercurial is not installed. + +- Issue #15298: ensure _sysconfigdata is generated in build directory, not + source directory. + +- Issue #15833: Fix a regression in 3.3 that resulted in exceptions being + raised if importlib failed to write byte-compiled files. This affected + attempts to build Python out-of-tree from a read-only source directory. + +- Issue #15923: Fix a mistake in ``asdl_c.py`` that resulted in a TypeError + after 2801bf875a24 (see #15801). + +- Issue #16135: Remove OS/2 support. + +- Issue #15819: Make sure we can build Python out-of-tree from a read-only + source directory. (Somewhat related to issue #9860.) + +- Issue #15587: Enable Tk high-resolution text rendering on Macs with + Retina displays. Applies to Tkinter apps, such as IDLE, on OS X + framework builds linked with Cocoa Tk 8.5. + +- Issue #17161: make install now also installs a python3 man page. + +C-API +----- + +- Issue #18351: Fix various issues in a function in importlib provided to help + PyImport_ExecCodeModuleWithPathnames() (and thus by extension + PyImport_ExecCodeModule() and PyImport_ExecCodeModuleEx()). + +- Issue #15767: Added PyErr_SetImportErrorSubclass(). + +- PyErr_SetImportError() now sets TypeError when its msg argument is set. + +- Issue #9369: The types of `char*` arguments of PyObject_CallFunction() and + PyObject_CallMethod() now changed to `const char*`. Based on patches by + Jörg Müller and Lars Buitinck. + +- Issue #17206: Py_CLEAR(), Py_DECREF(), Py_XINCREF() and Py_XDECREF() now + expand their arguments once instead of multiple times. Patch written by Illia + Polosukhin. + +- Issue #17522: Add the PyGILState_Check() API. + +- Issue #17327: Add PyDict_SetDefault. + +- Issue #16881: Fix Py_ARRAY_LENGTH macro for GCC < 3.1. + +- Issue #16505: Remove unused Py_TPFLAGS_INT_SUBCLASS. + +- Issue #16086: PyTypeObject.tp_flags and PyType_Spec.flags are now unsigned + (unsigned long and unsigned int) to avoid an undefined behaviour with + Py_TPFLAGS_TYPE_SUBCLASS ((1 << 31). PyType_GetFlags() result type is + now unsigned too (unsigned long, instead of long). + +- Issue #16166: Add PY_LITTLE_ENDIAN and PY_BIG_ENDIAN macros and unified + endianness detection and handling. + +Documentation +------------- + +- Issue #23006: Improve the documentation and indexing of dict.__missing__. + Add an entry in the language datamodel special methods section. + Revise and index its discussion in the stdtypes mapping/dict section. + +- Issue #17701: Improving strftime documentation. + +- Issue #18440: Clarify that `hash()` can truncate the value returned from an + object's custom `__hash__()` method. + +- Issue #17844: Add links to encoders and decoders for bytes-to-bytes codecs. + +- Issue #14097: improve the "introduction" page of the tutorial. + +- Issue #17977: The documentation for the cadefault argument's default value + in urllib.request.urlopen() is fixed to match the code. + +- Issue #6696: add documentation for the Profile objects, and improve + profile/cProfile docs. Patch by Tom Pinckney. + +- Issue #15940: Specify effect of locale on time functions. + +- Issue #17538: Document XML vulnerabilties + +- Issue #16642: sched.scheduler timefunc initial default is time.monotonic. + Patch by Ramchandra Apte + +- Issue #17047: remove doubled words in docs and docstrings + reported by Serhiy Storchaka and Matthew Barnett. + +- Issue #15465: Document the versioning macros in the C API docs rather than + the standard library docs. Patch by Kushal Das. + +- Issue #16406: Combine the pages for uploading and registering to PyPI. + +- Issue #16403: Document how distutils uses the maintainer field in + PKG-INFO. Patch by Jyrki Pulliainen. + +- Issue #16695: Document how glob handles filenames starting with a + dot. Initial patch by Jyrki Pulliainen. + +- Issue #8890: Stop advertising an insecure practice by replacing uses + of the /tmp directory with better alternatives in the documentation. + Patch by Geoff Wilson. + +- Issue #17203: add long option names to unittest discovery docs. + +- Issue #13094: add "Why do lambdas defined in a loop with different values + all return the same result?" programming FAQ. + +- Issue #14901: Update portions of the Windows FAQ. + Patch by Ashish Nitin Patil. + +- Issue #16267: Better document the 3.3+ approach to combining + @abstractmethod with @staticmethod, @classmethod and @property + +- Issue #15209: Clarify exception chaining description in exceptions module + documentation + +- Issue #15990: Improve argument/parameter documentation. + +- Issue #16209: Move the documentation for the str built-in function to a new + str class entry in the "Text Sequence Type" section. + +- Issue #13538: Improve str() and object.__str__() documentation. + +- Issue #16489: Make it clearer that importlib.find_loader() needs parent + packages to be explicitly imported. + +- Issue #16400: Update the description of which versions of a given package + PyPI displays. + +- Issue #15677: Document that zlib and gzip accept a compression level of 0 to + mean 'no compression'. Patch by Brian Brazil. + +- Issue #16197: Update winreg docstrings and documentation to match code. + Patch by Zachary Ware. + +- Issue #8040: added a version switcher to the documentation. Patch by + Yury Selivanov. + +- Issue #16241: Document -X faulthandler command line option. + Patch by Marek Šuppa. + +- Additional comments and some style changes in the concurrent.futures URL + retrieval example + +- Issue #16115: Improve subprocess.Popen() documentation around args, shell, + and executable arguments. + +- Issue #13498: Clarify docs of os.makedirs()'s exist_ok argument. Done with + great native-speaker help from R. David Murray. + +- Issue #15533: Clarify docs and add tests for `subprocess.Popen()`'s cwd + argument. + +- Issue #15979: Improve timeit documentation. + +- Issue #16036: Improve documentation of built-in `int()`'s signature and + arguments. + +- Issue #15935: Clarification of `argparse` docs, re: add_argument() type and + default arguments. Patch contributed by Chris Jerdonek. + +- Issue #11964: Document a change in v3.2 to the behavior of the indent + parameter of json encoding operations. + +- Issue #15116: Remove references to appscript as it is no longer being + supported. + +Tools/Demos +----------- + +- Issue #18817: Fix a resource warning in Lib/aifc.py demo. Patch by + Vajrasky Kok. + +- Issue #18439: Make patchcheck work on Windows for ACKS, NEWS. + +- Issue #18448: Fix a typo in Tools/demo/eiffel.py. + +- Issue #18457: Fixed saving of formulas and complex numbers in + Tools/demo/ss1.py. + +- Issue #18449: Make Tools/demo/ss1.py work again on Python 3. Patch by + Févry Thibault. + +- Issue #12990: The "Python Launcher" on OSX could not launch python scripts + that have paths that include wide characters. + +- Issue #15239: Make mkstringprep.py work again on Python 3. + +- Issue #17028: Allowed Python arguments to be supplied to the Windows + launcher. + +- Issue #17156: pygettext.py now detects the encoding of source files and + correctly writes and escapes non-ascii characters. + +- Issue #15539: Fix a number of bugs in Tools/scripts/pindent.py. Now + pindent.py works with a "with" statement. pindent.py no longer produces + improper indentation. pindent.py now works with continued lines broken after + "class" or "def" keywords and with continuations at the start of line. + +- Issue #11797: Add a 2to3 fixer that maps reload() to imp.reload(). + +- Issue #10966: Remove the concept of unexpected skipped tests. + +- Issue #9893: Removed the Misc/Vim directory. + +- Removed the Misc/TextMate directory. + +- Issue #16245: Add the Tools/scripts/parse_html5_entities.py script to parse + the list of HTML5 entities and update the html.entities.html5 dictionary. + +- Issue #15378: Fix Tools/unicode/comparecodecs.py. Patch by Serhiy Storchaka. + +- Issue #16549: Make json.tool work again on Python 3 and add tests. + Initial patch by Berker Peksag and Serhiy Storchaka. + +- Issue #13301: use ast.literal_eval() instead of eval() in Tools/i18n/msgfmt.py. + Patch by Serhiy Storchaka. + +Windows +------- + +- Issue #18569: The installer now adds .py to the PATHEXT variable when extensions + are registered. Patch by Paul Moore. + + What's New in Python 3.3.0? =========================== |