diff options
| -rw-r--r-- | Misc/NEWS | 125 |
1 files changed, 124 insertions, 1 deletions
@@ -1,4 +1,4 @@ -What's New in Python 2.0b2? +What's New in Python 2.0c1? =========================== Below is a list of all relevant changes since release 1.6. Older @@ -14,6 +14,129 @@ http://starship.python.net/crew/amk/python/writing/new-python/. ====================================================================== +What's new in 2.0 release candidate 1 (since beta 2)? +===================================================== + +All the changes since the last beta release are bug fixes or changes +to build support for specific platforms. + +Core language, builtins, and interpreter + +- A bug that caused crashes when __coerce__ was used with augmented + assignment, e.g. +=, was fixed. + +- Raise ZeroDivisionError when raising zero to a negative number, + e.g. 0.0 ** -2.0. Note that math.pow is unrelated to the builtin + power operator and the result of math.pow(0.0, -2.0) will vary by + platform. On Linux, it raises a ValueError. + +- A bug in Unicode string interpolation was fixed that occasionally + caused errors with formats including "%%". For example, the + following expression "%% %s" % u"abc" no longer raises a TypeError. + +- Compilation of deeply nested expressions raises MemoryError instead + of SyntaxError, e.g. eval("[" * 50 + "]" * 50). + +- In 2.0b2 on Windows, the interpreter wrote .pyc files in text mode, + rendering them useless. They are now written in binary mode again. + +Standard library + +- Keyword arguments are now accepted for most pattern and match object + methods in SRE, the standard regular expression engine. + +- In SRE, fix error with negative lookahead and lookbehind that + manifested itself as a runtime error in patterns like "?<!abc)(def)". + +- Tkinter now supports Unicode strings and will set a Python exception + when an error occurs handling a specific Unicode string. + +- Fix memory management errors in Merge() and Tkapp_Call() routines. + +- Several changes were made to cStringIO to make it compatible with + the file-like object interface and with StringIO. If operations are + performed on a closed object, an exception is raised. The truncate + method now accepts a position argument and readline accepts a size + argument. + +- There were many changes made to the linuxaudiodev module and its + test suite; as a result, a short, unexpected audio sample should now + play when the regression test is run. + + Note that this module is named poorly, because it should work + correctly on any platform that supports the Open Sound System + (OSS). + + The module now raises exceptions when errors occur instead of + crashing. It also defines the AFMT_A_LAW format (logarithmic A-law + audio) and defines a getptr() method that calls the + SNDCTL_DSP_GETxPTR ioctl defined in the OSS Programmer's Guide. + +- The library_version attribute, introduced in an earlier beta, was + removed because it can not be supported with early versions of the C + readline library, which provides no way to determine the version at + compile-time. + +- The binascii module is now enabled on Win64. + +Internals + +- Fix several buffer overflow vulnerabilities in calculate_path(), + which is called when the interpreter starts up to determine where + the standard library is installed. These vulnerabilities affect all + previous versions of Python and can be exploited by setting very + long values for PYTHONHOME or argv[0]. The risk is greatest for a + setuid Python script, although use of the wrapper in + Misc/setuid-prog.c will eliminate the vulnerability. + +- Fixed garbage collection bugs in instance creation that were + triggered when errors occurred during initialization. The solution, + applied in cPickle and in PyInstance_New(), is to call + PyObject_GC_Init() after the initialization of the object's + container attributes is complete. + +- pyexpat adds definitions of PyModule_AddStringConstant and + PyModule_AddObject if the Python version is less than 2.0, which + provides compatibility with PyXML on Python 1.5.2. + +- If the platform has a bogus definition for LONG_BIT (the number of + bits in a long), an error will be reported at compile time. + +- Fix bugs in _PyTuple_Resize() which caused hard-to-interpret garbage + collection crashes and possibly other, unreported crashes. + +- Fixed a memory leak in _PyUnicode_Fini(). + +Build issues + +- configure now accepts a --with-suffix option that specifies the + executable. This is useful for builds on Cygwin and Mac OS X, for + example. + +- The mmap.PAGESIZE constant is now initialized using sysconf when + possible, which eliminates a dependency on -lucb for Reliant UNIX. + +- The md5 file should now compile on all platforms. + +- The select module now compiles on platforms that do not define + POLLRDNORM and related constants. + +- Darwin (Mac OS X): Initial support for static builds on this + platform. + +- BeOS: Many changes were made to support compilation on BeOS 4.5 and + 5.0. + +- Cygwin: Support for shared libraries, Tkinter, and sockets. + +- SunOS 4.1.4_JL: Fix test for directory existence in configure. + +Tools and other miscellany + +- Removed debugging prints from main used with freeze. + +- IDLE auto-indent internals no longer crashes when it encounters + Unicode characters in the range 128 to 255. What's new in 2.0 beta 2 (since beta 1)? ======================================== |