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* bpo-43399: Fix ElementTree.extend not working on iterators (GH-24751)Alex Prengère2021-03-301-0/+1
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* bpo-43420: Simple optimizations for Fraction's arithmetics (GH-24779)Sergey B Kirpichev2021-03-221-0/+1
| | | | | | | bpo-43420: Implement standard transformations in + - * / that can often reduce the size of intermediate integers needed. For rationals with large components, this can yield dramatic speed improvements, but for small rationals can run 10-20% slower, due to increased fixed overheads in the longer-winded code. If those slowdowns turn out to be a problem, see the PR discussion for low-level implementation tricks that could cut other fixed overheads. Co-authored-by: Tim Peters <tim.peters@gmail.com> Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
* bpo-42603: Add whatsnew and ACKS entries. (GH-24675)Ned Deily2021-03-011-0/+1
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* bpo-42819, readline: Disable bracketed paste (GH-24108)Dustin Rodrigues2021-02-151-0/+1
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* bpo-38250: [Enum] single-bit flags are canonical (GH-24215)Ethan Furman2021-01-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Flag members are now divided by one-bit verses multi-bit, with multi-bit being treated as aliases. Iterating over a flag only returns the contained single-bit flags. Iterating, repr(), and str() show members in definition order. When constructing combined-member flags, any extra integer values are either discarded (CONFORM), turned into ints (EJECT) or treated as errors (STRICT). Flag classes can specify which of those three behaviors is desired: >>> class Test(Flag, boundary=CONFORM): ... ONE = 1 ... TWO = 2 ... >>> Test(5) <Test.ONE: 1> Besides the three above behaviors, there is also KEEP, which should not be used unless necessary -- for example, _convert_ specifies KEEP as there are flag sets in the stdlib that are incomplete and/or inconsistent (e.g. ssl.Options). KEEP will, as the name suggests, keep all bits; however, iterating over a flag with extra bits will only return the canonical flags contained, not the extra bits. Iteration is now in member definition order. If member definition order matches increasing value order, then a more efficient method of flag decomposition is used; otherwise, sort() is called on the results of that method to get definition order. ``re`` module: repr() has been modified to support as closely as possible its previous output; the big difference is that inverted flags cannot be output as before because the inversion operation now always returns the comparable positive result; i.e. re.A|re.I|re.M|re.S is ~(re.L|re.U|re.S|re.T|re.DEBUG) in both of the above terms, the ``value`` is 282. re's tests have been updated to reflect the modifications to repr().
* bpo-42870: Document change in argparse help output. (GH-24190)Tomáš Hrnčiar2021-01-121-0/+1
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* bpo-39068: Fix race condition in base64 (GH-17627)Brandon Stansbury2020-12-311-0/+1
| | | | There was a race condition in base64 in lazy initialization of multiple globals.
* bpo-42669: Document that `except` rejects nested tuples (GH-23822)Colin Watson2020-12-201-0/+1
| | | | | | | | | | | | | In Python 2, it was possible to use `except` with a nested tuple, and occasionally natural. For example, `zope.formlib.interfaces.InputErrors` is a tuple of several exception classes, and one might reasonably think to do something like this: try: self.getInputValue() return True except (InputErrors, SomethingElse): return False As of Python 3.0, this raises `TypeError: catching classes that do not inherit from BaseException is not allowed` instead: one must instead either break it up into multiple `except` clauses or flatten the tuple. However, the reference documentation was never updated to match this new restriction. Make it clear that the definition is no longer recursive. Automerge-Triggered-By: GH:ericvsmith
* Fixed typo in itertools documentation (GH-23816)Casper Smet2020-12-191-0/+1
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* bpo-42615: Delete redundant jump instructions that only bypass empty blocks ↵Om G2020-12-161-0/+1
| | | | | | | | | | | | | | | | | | | | | | | (GH-23733) * Delete jump instructions that bypass empty blocks * Add news entry * Explicitly check for unconditional jump opcodes Using the is_jump function results in the inclusion of instructions like returns for which this optimization is not really valid. So, instead explicitly check that the instruction is an unconditional jump. * Handle conditional jumps, delete jumps gracefully * Ensure b_nofallthrough and b_reachable are valid * Add test for redundant jumps * Regenerate importlib.h and edit Misc/ACKS * Fix bad whitespace
* Added support for negative indexes to PurePath.parents (GH-21799)Yaroslav Pankovych2020-11-231-0/+1
| | | | | | | | | | This commit also fixes up some of the overlapping documentation changed in bpo-35498, which added support for indexing with slices. Fixes bpo-21041. https://bugs.python.org/issue21041 Co-authored-by: Paul Ganssle <p.ganssle@gmail.com> Co-authored-by: Rémi Lapeyre <remi.lapeyre@henki.fr>
* bpo-15450: Allow subclassing of dircmp (GH-23424) (#23424)Nick Crews2020-11-231-0/+1
| | | Co-authored-by: Chris Jerdonek <chris.jerdonek@gmail.com>
* bpo-35498: Added slice support to PathLib parents attribute. (GH-11165)Joshua Cannon2020-11-201-0/+1
| | | Added slice support to the `pathlib.Path.parents` sequence. For a `Path` `p`, slices of `p.parents` should return the same thing as slices of `tuple(p.parents)`.
* bpo-42345: Fix three issues with typing.Literal parameters (GH-23294)Yurii Karabas2020-11-171-0/+1
| | | | | | | Literal equality no longer depends on the order of arguments. Fix issue related to `typing.Literal` caching by adding `typed` parameter to `typing._tp_cache` function. Add deduplication of `typing.Literal` arguments.
* bpo-36310: Allow pygettext.py to detect calls to gettext in f-strings. ↵jack11422020-11-091-0/+1
| | | | | | | (GH-19875) Adds support to Tools/i18n/pygettext.py for gettext calls in f-strings. This process is done by parsing the f-strings, processing each value, and flagging the ones which contain a gettext call. Co-authored-by: Batuhan Taskaya <batuhanosmantaskaya@gmail.com>
* bpo-29981: Add examples and update index for set, dict, and generator ↵Florian Dahlitz2020-10-201-0/+1
| | | | | | comprehensions'(GH-20272) Co-authored-by: Rémi Lapeyre <remi.lapeyre@henki.fr>
* bpo-39693: mention KeyError in tarfile extractfile documentation (GH-18639)Andrey Doroschenko2020-10-201-0/+1
| | | Co-authored-by: Andrey Darascheka <andrei.daraschenka@leverx.com>
* bpo-38912: fix close before connect callback in test_asyncio SSL tests ↵Justin Turner Arthur2020-10-201-0/+1
| | | | | (GH-22691) Reduces the rate at which the ENV CHANGED failure occurs in test_asyncio SSL tests (due to unclosed transport), but does not 100% resolve it.
* bpo-41586: Add pipesize parameter to subprocess & F_GETPIPE_SZ and ↵Ruben Vorderman2020-10-191-0/+1
| | | | | | | | | | | | | | | | | F_SETPIPE_SZ to fcntl. (GH-21921) * Add F_SETPIPE_SZ and F_GETPIPE_SZ to fcntl module * Add pipesize parameter for subprocess.Popen class This will allow the user to control the size of the pipes. On linux the default is 64K. When a pipe is full it blocks for writing. When a pipe is empty it blocks for reading. On processes that are very fast this can lead to a lot of wasted CPU cycles. On a typical Linux system the max pipe size is 1024K which is much better. For high performance-oriented libraries such as xopen it is nice to be able to set the pipe size. The workaround without this feature is to use my_popen_process.stdout.fileno() in conjuction with fcntl and 1031 (value of F_SETPIPE_SZ) to acquire this behavior.
* bpo-41966: Fix pickling pure datetime.time subclasses (GH-22731)scaramallion2020-10-181-0/+1
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* bpo-41876: Overload __repr__ for tkinter Font objects (GH-22450)Anatoliy Platonov2020-10-141-0/+1
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* Revert "bpo-26680: Incorporate is_integer in all built-in and standard ↵Raymond Hettinger2020-10-071-1/+0
| | | | | library numeric types (GH-6121)" (GH-22584) This reverts commit 58a7da9e125422323f79c4ee95ac5549989d8162.
* bpo-41923: PEP 613: Add TypeAlias to typing module (#22532)Mikhail Golubev2020-10-071-0/+1
| | | | | This special marker annotation is intended to help in distinguishing proper PEP 484-compliant type aliases from regular top-level variable assignments.
* bpo-41428: Documentation for PEP 604 (gh-22517)Fidget-Spinner2020-10-051-0/+1
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* bpo-26680: Incorporate is_integer in all built-in and standard library ↵Robert Smallshire2020-10-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | numeric types (GH-6121) * bpo-26680: Adds support for int.is_integer() for compatibility with float.is_integer(). The int.is_integer() method always returns True. * bpo-26680: Adds a test to ensure that False.is_integer() and True.is_integer() are always True. * bpo-26680: Adds Real.is_integer() with a trivial implementation using conversion to int. This default implementation is intended to reduce the workload for subclass implementers. It is not robust in the presence of infinities or NaNs and may have suboptimal performance for other types. * bpo-26680: Adds Rational.is_integer which returns True if the denominator is one. This implementation assumes the Rational is represented in it's lowest form, as required by the class docstring. * bpo-26680: Adds Integral.is_integer which always returns True. * bpo-26680: Adds tests for Fraction.is_integer called as an instance method. The tests for the Rational abstract base class use an unbound method to sidestep the inability to directly instantiate Rational. These tests check that everything works correct as an instance method. * bpo-26680: Updates documentation for Real.is_integer and built-ins int and float. The call x.is_integer() is now listed in the table of operations which apply to all numeric types except complex, with a reference to the full documentation for Real.is_integer(). Mention of is_integer() has been removed from the section 'Additional Methods on Float'. The documentation for Real.is_integer() describes its purpose, and mentions that it should be overridden for performance reasons, or to handle special values like NaN. * bpo-26680: Adds Decimal.is_integer to the Python and C implementations. The C implementation of Decimal already implements and uses mpd_isinteger internally, we just expose the existing function to Python. The Python implementation uses internal conversion to integer using to_integral_value(). In both cases, the corresponding context methods are also implemented. Tests and documentation are included. * bpo-26680: Updates the ACKS file. * bpo-26680: NEWS entries for int, the numeric ABCs and Decimal. Co-authored-by: Robert Smallshire <rob@sixty-north.com>
* bpo-41842: Add codecs.unregister() function (GH-22360)Hai Shi2020-09-281-0/+1
| | | | Add codecs.unregister() and PyCodec_Unregister() functions to unregister a codec search function.
* bpo-41810: Reintroduce `types.EllipsisType`, `.NoneType` & ↵Bas van Beek2020-09-221-0/+1
| | | | | `.NotImplementedType` (GH-22336) closes issue 41810
* Enum: add extended AutoNumber example (GH-22349)Ethan Furman2020-09-221-0/+1
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* bpo-40084: Enum - dir() includes member attributes (GH-19219)Angelin BOOZ2020-09-211-0/+1
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* Add missing whatsnew entry for TestCase.assertNoLogs (GH-22317)Mark Dickinson2020-09-191-0/+1
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* acknowledge Weipeng Hong's contributions (GH-22284)Ethan Furman2020-09-161-0/+1
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* bpo-39728: Enum: fix duplicate `ValueError` (GH-22277)Ethan Furman2020-09-161-0/+1
| | | | fix default `_missing_` to return `None` instead of raising a `ValueError` Co-authored-by: Andrey Darascheka <andrei.daraschenka@leverx.com>
* bpo-41316: Make tarfile follow specs for FNAME (GH-21511)Artem Bulgakov2020-09-071-0/+1
| | | | | | | | | | tarfile writes full path to FNAME field of GZIP format instead of just basename if user specified absolute path. Some archive viewers may process file incorrectly. Also it creates security issue because anyone can know structure of directories on system and know username or other personal information. RFC1952 says about FNAME: This is the original name of the file being compressed, with any directory components removed. So tarfile must remove directory names from FNAME and write only basename of file. Automerge-Triggered-By: @jaraco
* bpo-39994: Fix pprint handling of dict subclasses that override __repr__ ↵Irit Katriel2020-08-301-0/+1
| | | | | (GH-21892) Co-authored-by: Palak Kumar Jha
* bpo-36982: Add support for extended color functions in ncurses 6.1 (GH-17536)Hans Petter Jansson2020-08-041-0/+2
| | | Co-authored-by: Jeffrey Kintscher <websurfer@surf2c.net>
* bpo-38731: Add --quiet option to py_compile CLI (GH-17134)Gregory Schevchenko2020-07-251-0/+1
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* Remove trailing >>> in enum docs (GH-21358)E-Paine2020-07-091-0/+1
| | | The >>> as the last line serve no purpose and are not colored correctly by Sphinx.
* bpo-41048: mimetypes should read the rule file using UTF-8, not the locale ↵Srinivas Reddy Thatiparthy (శ్రీనివాస్ రెడ్డి తాటిపర్తి)2020-06-291-0/+1
| | | | encoding (GH-20998)
* closes bpo-28557: error message for bad raw readinto (GH-7496)David Szotten2020-06-151-0/+1
| | | Co-authored-by: Benjamin Peterson <benjamin@python.org>
* bpo-40448: ensurepip: Do not use cache (GH-19812)Krzysztof Konopko2020-06-151-0/+1
| | | | | | | | | | | | | | | ensurepip optionally installs or upgrades 'pip' and 'setuptools' using the version of those modules bundled with Python. The internal PIP installation routine by default temporarily uses its cache, if it exists. This is undesirable as Python builds and installations may be independent of the user running the build, whilst PIP cache location is dependent on the user's environment and outside of the build environment. At the same time, there's no value in using the cache while installing bundled modules. This change disables PIP caching when used in ensurepip.
* bpo-40630: Add tracemalloc.reset_peak (GH-20102)Huon Wilson2020-05-221-0/+1
| | | | | | | The reset_peak function sets the peak memory size to the current size, representing a resetting of that metric. This allows for recording the peak of specific sections of code, ignoring other code that may have had a higher peak (since the most recent `tracemalloc.start()` or tracemalloc.clear_traces()` call).
* Revert "bpo-26317: Support OBJC and OBJCXX configure command line variables ↵Ned Deily2020-05-181-1/+0
| | | | | | | | | (GH-20176)" (GH-20182) This reverts commit 0da546665075aefbb476e192ed64122d340164f4. The commit is causing make failures on a FreeBSD buildbot. Due to the imminent 3.9.0b1 cutoff, revert this commit for now pending further investigation.
* bpo-26317: Support OBJC and OBJCXX configure command line variables (GH-20176)Ned Deily2020-05-181-0/+1
| | | | | | Add support to the configure script for OBJC and OBJCXX command line options so that the macOS builds can use the clang compiler for the macOS-specific Objective C source files. This allows third-party compilers, like GNU gcc, to be used to build the rest of the project since some of the Objective C system header files are not compilable by GNU gcc. Co-authored-by: Jeffrey Kintscher <websurfer@surf2c.net> Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
* bpo-35569: add Erlend to Misc/ACKS (GH-20146)Ned Deily2020-05-171-0/+1
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* Add Andrew York to ACKS for GH-19622. (GH-20105)Chris Jerdonek2020-05-151-0/+1
| | | | This updates ACKS for commit 003708bcf8f2c58d4b65f68318acf164d713e008 contributed by Andrew York.
* bpo-40607: Reraise exception during task cancelation in asyncio.wait_for() ↵romasku2020-05-151-0/+1
| | | | | | | | | | | | | | | (GH-20054) Currently, if asyncio.wait_for() timeout expires, it cancels inner future and then always raises TimeoutError. In case those future is task, it can handle cancelation mannually, and those process can lead to some other exception. Current implementation silently loses thoses exception. To resolve this, wait_for will check was the cancelation successfull or not. In case there was exception, wait_for will reraise it. Co-authored-by: Roman Skurikhin <roman.skurikhin@cruxlab.com>
* bpo-40495: compileall option to hardlink duplicate pyc files (GH-19901)Lumír 'Frenzy' Balhar2020-05-141-0/+1
| | | | | | | compileall is now able to use hardlinks to prevent duplicates in a case when .pyc files for different optimization levels have the same content. Co-authored-by: Miro Hrončok <miro@hroncok.cz> Co-authored-by: Victor Stinner <vstinner@python.org>
* bpo-40499: Mention that asyncio.wait() needs a non-empty aws set (GH-19900)Joel Rosdahl2020-05-041-0/+1
| | | | | A similar formulation was added in bpo-21596 (db74d982d43d98040e38665d843cbc8de4a082b1) but was lost in bpo-33649 (3faaa8857a42a36383bb18425444e597fc876797).
* bpo-39435: Fix docs for pickle.loads (GH-18160)Shantanu2020-05-011-0/+1
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* bpo-40394 - difflib.SequenceMatched.find_longest_match default args (GH-19742)lrjball2020-04-301-0/+1
| | | | | * bpo-40394 - difflib.SequenceMatched.find_longest_match default args Added default args to find_longest_match, as well as related tests.
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