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What's New in Python 3.2 Alpha 1?
=================================

*Release date: XX-XXX-XXX*

Core and Builtins
-----------------

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- Issue #7085: Fix crash when importing some extensions in a thread
  on MacOSX 10.6.

18 19
- Issue #1757126: Fix the cyrillic-asian alias for the ptcp154 encoding.

20 21 22
- Issue #6970: Remove redundant calls when comparing objects that don't
  implement the relevant rich comparison methods.

23 24 25 26 27 28
- Issue #7298: fixes for range and reversed(range(...)).  Iteration
  over range(a, b, c) incorrectly gave an empty iterator when a, b and
  c fit in C long but the length of the range did not.  Also fix
  several cases where reversed(range(a, b, c)) gave wrong results, and
  fix a refleak for reversed(range(a, b, c)) with large arguments.

29 30 31
- Issue #7244: itertools.izip_longest() no longer ignores exceptions
  raised during the formation of an output tuple.

32 33 34
- Issue #3297: On wide unicode builds, do not split unicode characters into
  surrogates.

35 36
- Remove length limitation when constructing a complex number from a string.

37 38
- Issue #1087418: Boost performance of bitwise operations for longs.

39 40 41 42 43 44 45
- Support for AtheOS has been completely removed from the code base. It was
  disabled since Python 3.0.

- Support for several legacy threading libraries has been disabled. These
  libraries are: Mach C threads, SunOS LWP, GNU pth, Irix threads. Support code
  will be entirely removed in 3.3.

46 47
- Peephole constant folding had missed UNARY_POSITIVE.

48 49 50 51
- Issue #1722344: threading._shutdown() is now called in Py_Finalize(), which
  fixes the problem of some exceptions being thrown at shutdown when the
  interpreter is killed. Patch by Adam Olsen.

52
- Issue #7147: Remove support for compiling Python without complex number
53 54
  support.

55 56 57
- Issue #7120: logging: Removed import of multiprocessing which is causing
  crash in GAE.

58 59 60 61
- Issue #1754094: Improve the stack depth calculation in the compiler.
  There should be no other effect than a small decrease in memory use.
  Patch by Christopher Tur Lesniewski-Laas.

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- Issue #7065: Fix a crash in bytes.maketrans and bytearray.maketrans when
63
  using byte values greater than 127.  Patch by Derk Drukker.
64

65 66 67 68 69
- Issue #1571184: The Unicode database contains properties for more characters.
  The tables for code points representing numeric values, white spaces or line
  breaks are now generated from the official Unicode Character Database files,
  and include information from the Unihan.txt file.

70 71 72
- Issue #7019: Raise ValueError when unmarshalling bad long data, instead
  of producing internally inconsistent Python longs.

73 74 75
- Issue #6990: Fix threading.local subclasses leaving old state around
  after a reference cycle GC which could be recycled by new locals.

76 77
- Issue #5460: Fix an ambiguity in the grammar.

78 79
- Issue #1766304: Improve performance of membership tests on range objects.

80 81
- Issue #6713: Improve performance of integer -> string conversions.

82 83
- Issue #6846: Fix bug where bytearray.pop() returns negative integers.

84 85 86
- Issue #6750: A text file opened with io.open() could duplicate its output
  when writing from multiple threads at the same time.

87 88
- Issue #6707: dir() on an uninitialized module caused a crash.

89 90
- Issue #6540: Fixed crash for bytearray.translate() with invalid parameters.

91 92 93
- Issue #6573: set.union() stopped processing inputs if an instance of self
  occurred in the argument chain.

94 95 96
- Issue #6070: On posix platforms import no longer copies the execute bit
  from the .py file to the .pyc file if it is set.

97 98
- Issue #1616979: Added the cp720 (Arabic DOS) encoding.

99 100 101 102
- Issue #6428: Since Python 3.0, the __bool__ method must return a bool
  object, and not an int.  Fix the corresponding error message, and the
  documentation.

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- The deprecated PyCObject has been removed.

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- Issue #6347: Include inttypes.h as well as stdint.h in pyport.h.
  This fixes a build failure on HP-UX: int32_t and uint32_t are
  defined in inttypes.h instead of stdint.h on that platform.

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- Issue #6373: Fixed a SystemError when encoding with the latin-1 codec and
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  the 'surrogateescape' error handler, a string which contains unpaired
  surrogates.

113 114
- Issue #4856: Remove checks for win NT.

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C-API
-----

118 119 120
- Issue #Add '%lld' and '%llu' support to PyString_FromFormat(V)
  and PyErr_Format, on machines with HAVE_LONG_LONG defined.

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- Issue #6151: Made PyDescr_COMMON conform to standard C (like PyObject_HEAD
  in PEP 3123).  The PyDescr_TYPE and PyDescr_NAME macros should be
  should used for accessing the d_type and d_name members of structures
  using PyDescr_COMMON.

- Issue #6405: Remove duplicate type declarations in descrobject.h.
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- The code flags for old __future__ features are now available again.

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- Issue #5954: Add a PyFrame_GetLineNumber() function to replace most uses of
  PyCode_Addr2Line().

- Issue #5959: Add a PyCode_NewEmpty() function to create a new empty code
  object at a specified file, function, and line number.

- Issue #1419652: Change the first argument to PyImport_AppendInittab() to
  ``const char *`` as the string is stored beyond the call.

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Library
-------

143 144 145
- Issue #7354: distutils.tests.test_msvc9compiler - dragfullwindows can 
  be 2.

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- Issue #5037: Proxy the __bytes__ special method instead to __bytes__ instead
  of __str__.
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- Issue #7341: Close the internal file object in the TarFile constructor in
  case of an error.

152 153 154
- Issue #7293: distutils.test_msvc9compiler is fixed to work on any fresh
  Windows box. Help provided by David Bolen.

155 156 157
- Issue #2054: ftplib now provides an FTP_TLS class to do secure FTP using
  TLS or SSL.  Patch by Giampaolo Rodola'.

158 159
- Issue #7328: pydoc no longer corrupts sys.path when run with the '-m' switch

160 161 162
- Issue #4969: The mimetypes module now reads the MIME database from
  the registry under Windows.  Patch by Gabriel Genellina.

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- Issue #6816: runpy now provides a run_path function that allows Python code
  to execute file paths that refer to source or compiled Python files as well
  as zipfiles, directories and other valid sys.path entries that contain a
  __main__.py file. This allows applications that run other Python scripts to
  support the same flexibility as the CPython command line itself.

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- Issue #7318: multiprocessing now uses a timeout when it fails to establish
  a connection with another process, rather than looping endlessly. The
  default timeout is 20 seconds, which should be amply sufficient for
  local connections.

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- Issue #7197: Allow unittest.TextTestRunner objects to be pickled and
  unpickled. This fixes crashes under Windows when trying to run
  test_multiprocessing in verbose mode.

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- Issue #3001: Add a C implementation of recursive locks which is used by
  default when instantiating a `threading.RLock` object. This makes 
  recursive locks as fast as regular non-recursive locks (previously,
  they were slower by 10x to 15x).

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- Issue #7282: Fix a memory leak when an RLock was used in a thread other
  than those started through `threading.Thread` (for example, using
  `_thread.start_new_thread()`).

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- Issue #7187: Importlib would not silence the IOError raised when trying to
  write new bytecode when it was made read-only.

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- Issue #7264: Fix a possible deadlock when deallocating thread-local objects
  which are part of a reference cycle.

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- Issue #7211: Allow 64-bit values for the `ident` and `data` fields of kevent
  objects on 64-bit systems.  Patch by Michael Broghton.

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- Issue #6896: mailbox.Maildir now invalidates its internal cache each time
  a modification is done through it.  This fixes inconsistencies and test
  failures on systems with slightly bogus mtime behaviour.

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- Issue #7246 & Issue #7208: getpass now properly flushes input before
  reading from stdin so that existing input does not confuse it and
  lead to incorrect entry or an IOError.  It also properly flushes it
  afterwards to avoid the terminal echoing the input afterwards on
  OSes such as Solaris.

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- Issue #7233: Fix a number of two-argument Decimal methods to make
  sure that they accept an int or long as the second argument.  Also
  fix buggy handling of large arguments (those with coefficient longer
  than the current precision) in shift and rotate.

211 212 213
- Issue #4750: Store the basename of the original filename in the gzip FNAME
  header as required by RFC 1952.

214 215 216
- Issue #1180: Added a new global option to ignore ~/.pydistutils.cfg in
  Distutils.

217 218 219
- Issue #7218: Fix test_site for win32, the directory comparison was done with
  an uppercase.

220 221 222
- Issue #7205: Fix a possible deadlock when using a BZ2File object from
  several threads at once.

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- Issue #7077: logging: SysLogHandler now treats Unicode as per RFC 5424.

225 226 227
- Issue #7099: Decimal.is_normal now returns True for numbers with exponent
  larger than emax.

228 229 230
- Issue #7080: locale.strxfrm() raises a MemoryError on 64-bit non-Windows
  platforms, and assorted locale fixes by Derk Drukker.

231 232 233
- Issue #5833: Fix extra space character in readline completion with the
  GNU readline library version 6.0.

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- Issue #6894: Fixed the issue urllib2 doesn't respect "no_proxy" environment
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236 237
- Issue #7086: Added TCP support to SysLogHandler, and tidied up some
  anachronisms in the code which were a relic of 1.5.2 compatibility.
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- Issue #7082: When falling back to the MIME 'name' parameter, the
  correct place to look for it is the Content-Type header.

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- Make tokenize.detect_coding() normalize utf-8 and iso-8859-1 variants like the
  builtin tokenizer.

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- Issue #7048: Force Decimal.logb to round its result when that result
  is too large to fit in the current precision.

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- Issue #6236, #6348: Fix various failures in the I/O library under AIX
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  and other platforms, when using a non-gcc compiler. Patch by Derk Drukker.
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251 252 253
- Issue #4606: Passing 'None' if ctypes argtype is set to POINTER(...)
  does now always result in NULL.

254 255 256
- Issue #5042: Structure sub-subclass does now initialize correctly
  with base class positional arguments.

257 258
- Issue #6882: Import uuid creates zombies processes.

259 260
- Issue #6635: Fix profiler printing usage message.

261 262
- Issue #6856: Add a filter keyword argument to TarFile.add().

263 264
- Issue #6888: pdb's alias command was broken when no arguments were given.

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- Issue #6857: Default format() alignment should be '>' for Decimal
  instances.

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- Issue #6795: int(Decimal('nan')) now raises ValueError instead of
  returning NaN or raising InvalidContext.  Also, fix infinite recursion
  in long(Decimal('nan')).

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- Issue #6850: Fix bug in Decimal._parse_format_specifier for formats
  with no type specifier.

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- Issue #6239: ctypes.c_char_p return value must return bytes.

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- Issue #6838: Use a list to accumulate the value instead of
  repeatedly concatenating strings in http.client's
  HTTPResponse._read_chunked providing a significant speed increase
  when downloading large files servend with a Transfer-Encoding of 'chunked'.

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- Trying to import a submodule from a module that is not a package, ImportError
  should be raised, not AttributeError.

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- When the globals past to importlib.__import__() has __package__ set to None,
  fall back to computing what __package__ should be instead of giving up.

288 289 290 291
- Raise a TypeError when the name of a module to be imported for
  importlib.__import__ is not a string (was raising an
  AttributeError before).

292 293
- Allow the fromlist passed into importlib.__import__ to be any iterable.

294 295
- Have importlib raise ImportError if None is found in sys.modules.

296 297
- Issue #6054: Do not normalize stored pathnames in tarfile.

298 299 300
- Issue #6794: Fix Decimal.compare_total and Decimal.compare_total_mag: NaN
  payloads are now ordered by integer value rather than lexicographically.

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- Issue #1356969: Add missing info methods in tix.HList.

- Issue #1522587: New constants and methods for the tix.Grid widget.

- Issue #1250469: Fix the return value of tix.PanedWindow.panes.

- Issue #1119673: Do not override tkinter.Text methods when creating a
  ScrolledText.

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- Issue #6665: Fix fnmatch to properly match filenames with newlines in them.

312 313 314
- Issue #1135: Add the XView and YView mix-ins to avoid duplicating
  the xview* and yview* methods.

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- Issue #6629: Fix a data corruption issue in the new I/O library, which could
  occur when writing to a BufferedRandom object (e.g. a file opened in "rb+" or
  "wb+" mode) after having buffered a certain amount of data for reading. This
  bug was not present in the pure Python implementation.

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- Issue #6622: Fix "local variable 'secret' referenced before
  assignment" bug in POP3.apop.

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- Issue #2715: Remove remnants of Carbon.File from binhex module.

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- Issue #6595: The Decimal constructor now allows arbitrary Unicode
  decimal digits in input, as recommended by the standard.  Previously
  it was restricted to accepting [0-9].

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- Issue #6106: telnetlib.Telnet.process_rawq doesn't handle default WILL/WONT
  DO/DONT correctly.

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- Issue #1424152: Fix for http.client, urllib.request to support SSL while
  working through proxy. Original patch by Christopher Li, changes made by
  Senthil Kumaran
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- Add importlib.abc.ExecutionLoader to represent the PEP 302 protocol for
  loaders that allow for modules to be executed. Both importlib.abc.PyLoader
  and PyPycLoader inherit from this class and provide implementations in
  relation to other methods required by the ABCs.

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- importlib.abc.PyLoader did not inherit from importlib.abc.ResourceLoader like
  the documentation said it did even though the code in PyLoader relied on the
  abstract method required by ResourceLoader.

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- Issue #6431: Make Fraction type return NotImplemented when it doesn't
  know how to handle a comparison without loss of precision.  Also add
  correct handling of infinities and nans for comparisons with float.

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- Issue #6415: Fixed warnings.warn segfault on bad formatted string.
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- Issue #6358: The exit status of a command started with os.popen() was
  reported differently than it did with python 2.x.

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- Issue #6323: The pdb debugger did not exit when running a script with a
  syntax error.

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- Issue #3392: The subprocess communicate() method no longer fails in select()
  when file descriptors are large; communicate() now uses poll() when possible.

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- Issue #6369: Fix an RLE decompression bug in the binhex module.

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- Issue #6344: Fixed a crash of mmap.read() when passed a negative argument.

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- The deprecated function string.maketrans has been removed.

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- Issue #4005: Fixed a crash of pydoc when there was a zip file present in
  sys.path.

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- Issue #6218: io.StringIO and io.BytesIO instances are now picklable.

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Extension Modules
-----------------
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374 375
- Issue #7078: Set struct.__doc__ from _struct.__doc__.

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- Issue #3366: Add gamma function to math module.

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- Issue #6877: It is now possible to link the readline extension to the
  libedit readline emulation on OSX 10.5 or later.
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- Issue #6848: Fix curses module build failure on OS X 10.6.

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- Fix a segfault that could be triggered by expat with specially formed input.

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- Issue #6561: '\d' in a regex now matches only characters with
  Unicode category 'Nd' (Number, Decimal Digit).  Previously it also
  matched characters with category 'No'.

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- Issue #4509: Array objects are no longer modified after an operation
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  failing due to the resize restriction in-place when the object has exported
  buffers.

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- Issue #2389: Array objects are now pickled in a portable manner.

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Build
-----

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- Issue #5792: Extend the short float repr support to x86 systems using
  icc or suncc.

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- Issue #6603: Change READ_TIMESTAMP macro in ceval.c so that it
  compiles correctly under gcc on x86-64.  This fixes a reported
  problem with the --with-tsc build on x86-64.

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- Issue #6802: Fix build issues on MacOSX 10.6

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- Issue #6244: Allow detect_tkinter to look for Tcl/Tk 8.6.

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- Issue 4601: 'make install' did not set the appropriate permissions on
  directories.

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- Issue 5390: Add uninstall icon independent of whether file
  extensions are installed.

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Documentation
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------------

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- Document that importing a module that has None in sys.modules triggers an
  ImportError.

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- Issue #6556: Fixed the Distutils configuration files location explanation
  for Windows.

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Tests
-----

427 428 429
- Issue #7324: add a sanity check to regrtest argument parsing to
  catch the case of an option with no handler.

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- Issue #7312: Add a -F flag to run the selected tests in a loop until
  a test fails.  Can be combined with -j.

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- Issue #6551: test_zipimport could import and then destroy some modules of
  the encodings package, which would make other tests fail further down
  the road because the internally cached encoders and decoders would point
  to empty global variables.

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- Issue #7295: Do not use a hardcoded file name in test_tarfile.

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- Issue #7270: Add some dedicated unit tests for multi-thread synchronization
  primitives such as Lock, RLock, Condition, Event and Semaphore.

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- Issue #7248 (part 2): Use a unique temporary directory for importlib source
  tests instead of tempfile.tempdir. This prevents the tests from sharing state
  between concurrent executions on the same system.

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- Issue #7248: In importlib.test.source.util a try/finally block did not make
  sure that some referenced objects actually were created in the block before
  calling methods on the object.

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- Issue #7222: Make thread "reaping" more reliable so that reference
  leak-chasing test runs give sensible results. The previous method of
  reaping threads could return successfully while some Thread objects were
  still referenced. This also introduces a new private function:
  :func:`_thread._count()`.

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- Issue #7151: fixed regrtest -j so that output to stderr from a test no
  longer runs the risk of causing the worker thread to fail.

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- Issue #7055: test___all__ now greedily detects all modules which have an
  __all__ attribute, rather than using a hardcoded and incomplete list.

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- Issue #7058: Added save/restore for things like sys.argv and cwd to
  runtest_inner in regrtest, with warnings if the called test modifies them,
  and a new section in the summary report at the end.
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- Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.

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- Fixed tests in importlib.test.source.test_abc_loader that were masking
  the proper exceptions that should be raised for missing or improper code
  object bytecode.

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- Removed importlib's custom test discovery code and switched to
    unittest.TestLoader.discover().

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What's New in Python 3.1?
=========================

*Release date: 27-June-2009*

Core and Builtins
-----------------

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- Issue #6334: Fix bug in range length calculation for ranges with
  large arguments.

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- Issue #6329: Fixed iteration for memoryview objects (it was being blocked
  because it wasn't recognized as a sequence).

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Library
-------

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- Issue #6126: Fixed pdb command-line usage.

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- Issue #6314: logging: performs extra checks on the "level" argument.
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- Issue #6274: Fixed possible file descriptors leak in subprocess.py

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- Accessing io.StringIO.buffer now raises an AttributeError instead of
  io.UnsupportedOperation.

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- Issue #6271: mmap tried to close invalid file handle (-1) when anonymous.
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  (On Unix)

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- Issue #1202: zipfile module would cause a struct.error when attempting to
  store files with a CRC32 > 2**31-1.

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Extension Modules
-----------------

- Issue #5590: Remove unused global variable in pyexpat extension.

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What's New in Python 3.1 Release Candidate 2?
=============================================
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*Release date: 13-June-2009*
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Core and Builtins
-----------------

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- Fixed SystemError triggered by "range([], 1, -1)".

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- Issue #5924: On Windows, a large PYTHONPATH environment variable
  (more than 255 characters) would be completely ignored.

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- Issue #4547: When debugging a very large function, it was not always
  possible to update the lineno attribute of the current frame.

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- Issue #5330: C functions called with keyword arguments were not reported by
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  the various profiling modules (profile, cProfile). Patch by Hagen Fürstenau.
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Library
-------

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- Issue #6438: Fixed distutils.cygwinccompiler.get_versions : the regular
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  expression string pattern was trying to match against a bytes returned by
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  Popen. Tested under win32 to build the py-postgresql project.

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- Issue #6258: Support AMD64 in bdist_msi.

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- Issue #6195: fixed doctest to no longer try to read 'source' data from
  binary files.

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- Issue #5262: Fixed bug in next rollover time computation in
  TimedRotatingFileHandler.

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- Issue #6217: The C implementation of io.TextIOWrapper didn't include the
  errors property.  Additionally, the errors and encoding properties of StringIO
  are always None now.

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- Issue #6137: The pickle module now translates module names when loading
  or dumping pickles with a 2.x-compatible protocol, in order to make data
  sharing and migration easier. This behaviour can be disabled using the
  new `fix_imports` optional argument.

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- Removed the ipaddr module.

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- Issue #3613: base64.{encode,decode}string are now called
  base64.{encode,decode}bytes which reflects what type they accept and return.
  The old names are still there as deprecated aliases.

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- Issue #5767: Remove sgmlop support from xmlrpc.client.

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- Issue #6150: Fix test_unicode on wide-unicode builds.

568 569 570
- Issue #6149: Fix initialization of WeakValueDictionary objects from non-empty
  parameters.

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Windows
-------

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- Issue #6221: Delete test registry key before running the test.

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- Issue #6158: Package Sine-1000Hz-300ms.aif in MSI file.

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C-API
-----

- Issue #5735: Python compiled with --with-pydebug should throw an
  ImportError when trying to import modules compiled without
  --with-pydebug, and vice-versa.

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Build
-----

- Issue #6154: Make sure the intl library is added to LIBS if needed. Also
  added LIBS to OS X framework builds.

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- Issue #5809: Specifying both --enable-framework and --enable-shared is
  an error. Configure now explicity tells you about this.


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What's New in Python 3.1 release candidate 1?
=============================================
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*Release date: 2009-05-30*
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Core and Builtins
-----------------

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- Issue #6097: Escape UTF-8 surrogates resulting from mbstocs conversion
  of the command line.

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- Issue #6012: Add cleanup support to O& argument parsing.

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- Issue #6089: Fixed str.format with certain invalid field specifiers
  that would raise SystemError.

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- Issue #5982: staticmethod and classmethod now expose the wrapped
  function with __func__.

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- Added support for multiple context managers in the same with-statement.
  Deprecated contextlib.nested() which is no longer needed.
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- Issue #5829: complex("1e500") no longer raises OverflowError.  This
  makes it consistent with float("1e500") and interpretation of real
  and imaginary literals.

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- Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.

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- Issue #5994: the marshal module now has docstrings.

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- Issue #5981: Fix three minor inf/nan issues in float.fromhex:
  (1) inf and nan strings with trailing whitespace were incorrectly
  rejected;  (2) parsing of strings representing infinities and nans
  was locale aware; and (3) the interpretation of fromhex('-nan')
  didn't match that of float('-nan').

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Library
-------

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- Issue #4859: Implement PEP 383 for pwd, spwd, and grp.

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- smtplib 'login' and 'cram-md5' login are also fixed (see Issue #5259).

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- Issue #6121: pydoc now ignores leading and trailing spaces in the
  argument to the 'help' function.

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- Issue #6118: urllib.parse.quote_plus ignored the encoding and errors
  arguments for strings with a space in them.

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- collections.namedtuple() was not working with the following field
  names:  cls, self, tuple, itemgetter, and property.

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- In unittest, using a skipping decorator on a class is now equivalent to
  skipping every test on the class.  The ClassTestSuite class has been removed.

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- Issue #6050: Don't fail extracting a directory from a zipfile if
  the directory already exists.

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- Issue #1309352: fcntl now converts its third arguments to a C `long` rather
  than an int, which makes some operations possible under 64-bit Linux (e.g.
  DN_MULTISHOT with F_NOTIFY).

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- Issue #5761: Add the name of the underlying file to the repr() of various
  IO objects.

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- Issue #5259: smtplib plain auth login no longer gives a traceback.  Fix
  by Musashi Tamura, tests by Marcin Bachry.

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- Issue #1983: Fix functions taking or returning a process identifier to use
  the dedicated C type ``pid_t`` instead of a C ``int``. Some platforms have
  a process identifier type wider than the standard C integer type.

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- Issue #4066: smtplib.SMTP_SSL._get_socket now correctly returns the socket.
  Patch by Farhan Ahmad, test by Marcin Bachry.

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- Issue #2116: Weak references and weak dictionaries now support copy()ing and
  deepcopy()ing.

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- Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.

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- Issue #5918: Fix a crash in the parser module.

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- Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.

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- Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
  library. This means, for example, that opening an UTF-16 text file in
  append mode doesn't add a BOM at the end of the file if the file isn't
  empty.

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- Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
  file is a binary.  Patch by Brodie Rao, tests by Daniel Diniz.  This fix
  corrects a pydoc regression.

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- Issue 5955: aifc's close method did not close the file it wrapped,
  now it does.  This also means getfp method now returns the real fp.

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Installation
------------

- Issue #6047: fullinstall has been removed because Python 3's executable will
  now be known as python3.
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- Lib/smtpd.py is no longer installed as a script.

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Extension Modules
-----------------

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- Issue #3061: Use wcsftime for time.strftime where available.
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- Issue #4873: Fix resource leaks in error cases of pwd and grp.

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- Issue #6093: Fix off-by-one error in locale.strxfrm.

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- The _functools and _locale modules are now built into the libpython shared
  library instead of as extension modules.
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Build
-----

- Issue #3585: Add pkg-config support. It creates a python-2.7.pc file
  and a python3.pc symlink in the $(LIBDIR)/pkgconfig directory. Patch by
  Clinton Roy.

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Tests
-----

- Issue 5442: Tests for importlib were not properly skipping case-sensitivity
  tests on darwin even when the OS was installed on a case-sensitive
  filesystem. Also fixed tests that should not be run when
  sys.dont_write_bytecode is true.


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What's New in Python 3.1 beta 1?
================================

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*Release date: 2009-05-06*
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Core and Builtins
-----------------

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- Issue #5914: Add new C API function PyOS_string_to_double, and
  deprecate PyOS_ascii_strtod and PyOS_ascii_atof.

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- Issue #3382: float.__format__, complex.__format__, and %-formatting
  no longer map 'F' to 'f'. Because of issue #5859 (below), this only
  affects nan -> NAN and inf -> INF.

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- Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
  in all operations, including splitdrive, split, etc.  splitunc() now issues
  a PendingDeprecation warning.

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- Issue #5920: For float.__format__, change the behavior with the
  empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
  to be like 'g' but with at least one decimal point and with a
  default precision of 12. Previously, the behavior the same but with
  a default precision of 6.  This more closely matches str(), and
  reduces surprises when adding alignment flags to the empty
  presentation type. This also affects the new complex.__format__ in
  the same way.

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- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.

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- Issue #5890: in subclasses of 'property' the __doc__ attribute was
  shadowed by classtype's, even if it was None.  property now
  inserts the __doc__ into the subclass instance __dict__.

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- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
  sequences. Patch by Nick Barnes and Victor Stinner.

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- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
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- Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
  received a new method, detach().  detach() disconnects the underlying stream
  from the buffer or text IO and returns it.

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- Issue #5859: Remove switch from '%f' to '%g'-style formatting for
  floats with absolute value over 1e50.  Also remove length
  restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
  12.34 no longer raise an exception.
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- Issue #1588: Add complex.__format__. For example,
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  format(complex(1, 2./3), '.5') now produces a sensible result.

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- Issue #5864: Fix empty format code formatting for floats so that it
  never gives more than the requested number of significant digits.

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- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
  new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.

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- Issue #5835: Deprecate PyOS_ascii_formatd.

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- Issue #4971: Fix titlecase for characters that are their own
  titlecase, but not their own uppercase.

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- Issue #5283: Setting __class__ in __del__ caused a segfault.

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- Issue #5816: complex(repr(z)) now recovers z exactly, even when
  z involves nans, infs or negative zeros.

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- Issue #3166: Make int -> float conversions correctly rounded.
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- Issue #1869 (and many duplicates): make round(x, n) correctly
  rounded for a float x, by using the decimal <-> binary conversions
  from Python/dtoa.c.  As a consequence, (e.g.) round(x, 2) now
  consistently agrees with format(x, '.2f').

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- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
  some builtin types.

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- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.

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- Issue #5515: str.format() type 'n' combined with commas and leading
  zeros no longer gives odd results with ints and floats.
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- Implement PEP 378, Format Specifier for Thousands Separator, for
  floats.

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- The str function switches to exponential notation at
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  1e11, not 1e12.  This avoids printing 13 significant digits in
  situations where only 12 of them are correct.  Example problem
  value: str(1e11 + 0.5).  (This minor issue has existed in 2.x for a
  long time.)

- Issue #1580: On most platforms, use a 'short' float repr: for a
  finite float x, repr(x) now outputs a string based on the shortest
  sequence of decimal digits that rounds to x.  Previous behaviour was
  to output 17 significant digits and then strip trailing zeros.
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  Another minor difference is that the new repr switches to
  exponential notation at 1e16 instead of the previous 1e17; this
  avoids misleading output in some cases.
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  There's a new sys attribute sys.float_repr_style, which takes
  the value 'short' to indicate that we're using short float repr,
  and 'legacy' if the short float repr isn't available for one
  reason or another.

  The float repr change involves incorporating David Gay's 'perfect
  rounding' code into the Python core (it's in Python/dtoa.c).  As a
  secondary consequence, all string-to-float and float-to-string
  conversions (including all float formatting operations) will be
  correctly rounded on these platforms.

  See issue 1580 discussions for details of platforms for which
  this change does not apply.

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- Issue #5759: float() didn't call __float__ on str subclasses.

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- The string.maketrans() function is deprecated; there is a new static method
  maketrans() on the bytes and bytearray classes.  This removes confusion about
  the types string.maketrans() is supposed to work with, and mirrors the
  methods available on the str class.

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- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
  its clarity and its speed.

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- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
  to avoid compiler warnings.

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- Issue #3739: The unicode-internal encoder now reports the number of characters
  consumed like any other encoder (instead of the number of bytes).

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Installation
------------

- Issue #5756: Install idle and pydoc with a 3 suffix.

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Library
-------

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- Issue #5311: bdist_msi can now build packages that do not depend on a
  specific Python version.

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- Issue #5150: IDLE's format menu now has an option to strip trailing
  whitespace.

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- Issue #5940: distutils.command.build_clib.check_library_list was not doing
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  the right type checkings anymore.

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- Issue #4875: On win32, ctypes.util.find_library does no longer
  return directories.

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- Issue #5142: Add the ability to skip modules while stepping to pdb.

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- Issue #1309567: Fix linecache behavior of stripping subdirectories when
  looking for files given by a relative filename.

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- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
  turtle demos in Demo/turtle.

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- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
  extracting a file to the root directory.

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- Issue #5913: os.listdir() should fail for empty path on windows.

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- Issue #5084: unpickling now interns the attribute names of pickled objects,
  saving memory and avoiding growth in size of subsequent pickles. Proposal
  and original patch by Jake McGuire.

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- The json module now works exclusively with str and not bytes.

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- Issue #3959: The ipaddr module has been added to the standard library.
  Contributed by Google.

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- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
  error when a named pipe is encountered, rather than blocking infinitely.

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- Issue #5857: tokenize.tokenize() now returns named tuples.

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- Issue #4305: ctypes should now build again on mipsel-linux-gnu

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- Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
  string is already in normalized form, by performing a quick check beforehand.
  Original patch by Rauli Ruohonen.

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- Issue #5853: calling a function of the mimetypes module from several threads
  at once could hit the recursion limit if the mimetypes database hadn't been
  initialized before.

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- Issue #5854: Updated __all__ to include some missing names and remove some
  names which should not be exported.

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- Issue #3102:  All global symbols that the _ctypes extension defines
  are now prefixed with 'Py' or '_ctypes'.

- Issue #5041: ctypes does now allow pickling wide character.

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- Issue #5812: For the two-argument form of the Fraction constructor,
  Fraction(m, n), m and n are permitted to be arbitrary Rational
  instances.

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- Issue #5812: Fraction('1e6') is valid: more generally, any string
  that's valid for float() is now valid for Fraction(), with the
  exception of strings representing NaNs and infinities.

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- Issue #5734: BufferedRWPair was poorly tested and had several glaring
  bugs. Patch by Brian Quinlan.

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- Issue #1161031: fix readwrite select flag handling: POLLPRI now
  results in a handle_expt_event call, not handle_read_event, and POLLERR
  and POLLNVAL now call handle_close, not handle_expt_event.  Also,
  dispatcher now has an 'ignore_log_types' attribute for suppressing
  log messages, which is set to 'warning' by default.

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- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
  new arguments introduced in 2.5.
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- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
  makeunicodedata.py and regenerated the Unicode database (This fixes
  u'\u1d79'.lower() == '\x00').
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Extension Modules
-----------------

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- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
  pwd.

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- Issue #5463: In struct module, remove deprecated float coercion
  for integer type codes: struct.pack('L', 0.3) should now raise
  an error.  The _PY_STRUCT_FLOAT_COERCE constant has been removed.
  The version number has been bumped to 0.3.

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- Issue #5359: Readd the Berkley-DB detection code to allow _dbm be built
  using Berkley-DB.

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Tests
-----

- Issue #5354: New test support function import_fresh_module() makes
  it easy to import both normal and optimised versions of modules.
  test_heapq and test_warnings have been adjusted to use it, tests for
  other modules with both C and Python implementations in the stdlib
  can be adjusted to use it over time.

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- Issue #5837: Certain sequences of calls to set() and unset() for
  support.EnvironmentVarGuard objects restored the environment variables
  incorrectly on __exit__.

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C-API
-----

- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.

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What's New in Python 3.1 alpha 2?
=================================

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*Release date: 2009-4-4*
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Core and Builtins
-----------------
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- Implement PEP 378, Format Specifier for Thousands Separator, for
  integers.
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- Issue #5666: Py_BuildValue's 'c' code should create byte strings.

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- Issue #5499: The 'c' code for argument parsing functions now only accepts a
  byte, and the 'C' code only accepts a unicode character.

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- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
  when hitting the recursion limit under certain circumstances.

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- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.

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- Fix a segfault when running test_exceptions with coverage, caused by
  insufficient checks in accessors of Exception.__context__.

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- Issue #5604: non-ASCII characters in module name passed to
  imp.find_module() were converted to UTF-8 while the path is
  converted to the default filesystem encoding, causing nonsense.

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- Issue #5126: str.isprintable() returned False for space characters.

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- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
  the end sys.path, for compatibility with the system install of Python.

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- Issue #4688: Add a heuristic so that tuples and dicts containing only
  untrackable objects are not tracked by the garbage collector. This can
  reduce the size of collections and therefore the garbage collection overhead
  on long-running programs, depending on their particular use of datatypes.

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- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
  improve its performance.  Long divisions and remainder operations
  are now between 50% and 150% faster.

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- Issue #4258: Make it possible to use base 2**30 instead of base
  2**15 for the internal representation of integers, for performance
  reasons.  Base 2**30 is enabled by default on 64-bit machines.  Add
  --enable-big-digits option to configure, which overrides the
  default.  Add sys.int_info structseq to provide information about
  the internal format.

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- Issue #4474: PyUnicode_FromWideChar now converts characters outside
  the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
  and sizeof(Py_UNICODE) == 2.

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- Issue #5237: Allow auto-numbered fields in str.format(). For
  example: '{} {}'.format(1, 2) == '1 2'.

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- Issue #5392: when a very low recursion limit was set, the interpreter would
  abort with a fatal error after the recursion limit was hit twice.

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- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
  short file names.

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Library
-------

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- Issue #2625: added missing items() call to the for loop in
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  mailbox.MH.get_message().

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- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
  error substitutions from non-strict codec error callbacks in
  incrementalencoder and StreamWriter.

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- Issue #5656: Fix the coverage reporting when running the test suite with
  the -T argument.

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- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.

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- Issue #5624: Fix the _winreg module name still used in several modules.

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- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.

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- Issue #5619: Multiprocessing children disobey the debug flag and causes
  popups on windows buildbots. Patch applied to work around this issue.

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- Issue #5400: Added patch for multiprocessing on netbsd compilation/support

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- Issue #5387: Fixed mmap.move crash by integer overflow.

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- Issue #5261: Patch multiprocessing's semaphore.c to support context
  manager use: "with multiprocessing.Lock()" works now.

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- Issue #5236: Change time.strptime() to only take strings. Didn't work with
  bytes already but the failure was non-obvious.

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- Issue #5177: Multiprocessing's SocketListener class now uses
  socket.SO_REUSEADDR on all connections so that the user no longer needs
  to wait 120 seconds for the socket to expire.

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- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().

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- Issue #1174606: Calling read() without arguments of an unbounded file
  (typically /dev/zero under Unix) could crash the interpreter.

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- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
  io.BufferedRandom have been deprecated for removal in Python 3.2.

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- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
  forever on incomplete input. That caused tarfile.open() to hang when used
  with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
  partial bzip2 compressed data.

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- Issue #2110: Add support for thousands separator and 'n' type
  specifier to Decimal.__format__

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- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
  '>' alignment characters.

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- The error detection code in FileIO.close() could fail to reflect the `errno`
  value, and report it as -1 instead.

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- Issue #5016: FileIO.seekable() could return False if the file position
  was negative when truncated to a C int. Patch by Victor Stinner.

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Extension Modules
-----------------

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- Issue #5391: mmap now deals exclusively with bytes.

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- Issue #5463: In struct module, remove deprecated overflow wrapping
  when packing an integer: struct.pack('=L', -1) now raises
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  struct.error instead of returning b'\xff\xff\xff\xff'.  The
  _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
  have been removed from the struct module.
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What's New in Python 3.1 alpha 1
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================================
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*Release date: 2009-03-07*
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Core and Builtins
-----------------

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- The io module has been reimplemented in C for speed.

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- Give dict views an informative __repr__.

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- Issue #5247: Improve error message when unknown format codes are
  used when using str.format() with str, int, and float arguments.

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- Issue #5249: time.strftime returned malformed string when format string
  contained non ascii character on windows.

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- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
  source has already been decoded into str.

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- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
  rotating the object pointer by 4 bits to the right.

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- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
  it now forces its argument to double before testing for infinity.

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- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
  returns a non-number type.

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- Issue #5182: Removed memoryview.__str__.

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- Issue #1717: Removed builtin cmp() function, dropped tp_compare
  slot, the C API functions PyObject_Compare and PyUnicode_Compare and
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  the type definition cmpfunc.  The tp_compare slot has been renamed
  to tp_reserved, and is reserved for future usage.
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- Issue #1242657: the __len__() and __length_hint__() calls in several tools
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  were suppressing all exceptions.  These include list() and bytearray().

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- Issue #4707: round(x, n) now returns an integer if x is an integer.
  Previously it returned a float.

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- Issue #4753: By enabling a configure option named '--with-computed-gotos'
  on compilers that support it (notably: gcc, SunPro, icc), the bytecode
  evaluation loop is compiled with a new dispatch mechanism which gives
  speedups of up to 20%, depending on the system, on various benchmarks.

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- Issue #4874: Most builtin decoders now reject unicode input.

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- Issue #4842: Don't allow trailing 'L' when constructing an integer
  from a string.

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- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.

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- Issue #4838: When a module is deallocated, free the memory backing the
  optional module state data.

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- Issue #4910: Rename nb_long slot to nb_reserved, and change its
  type to (void *).

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- Issue #4935: The overflow checking code in the expandtabs() method common
  to str, bytes and bytearray could be optimized away by the compiler, letting
  the interpreter segfault instead of raising an error.

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- Issue #3720: Fix a crash when an iterator modifies its class and removes its
  __next__ method.

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- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
  function no longer attempt to call the __long__ slot to convert an object
  to an integer.  Only the __int__ and __trunc__ slots are examined.

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- Issue #4893: Use NT threading on CE.

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- Issue #4915: Port sysmodule to Windows CE.

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- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
  common cases are optimized thanks to a dedicated fast path and a moderate
  amount of loop unrolling.

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- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
  collecting the oldest generation) so that allocating lots of objects without
  destroying them does not show quadratic performance. Based on a proposal by
  Martin von Löwis at
  http://mail.python.org/pipermail/python-dev/2008-June/080579.html.

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- Issue #4604: Some objects of the I/O library could still be used after
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  having been closed (for instance, a read() call could return some
  previously buffered data). Patch by Dmitry Vasiliev.

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- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
  flag to work properly. Furthermore, when specifying -u, the text stdout
  and stderr streams have line-by-line buffering enabled (the default being
  to buffer arbitrary chunks of data).

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- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
  instead of ints (reducing its size from 4 to 8 times thereby reducing
  Python's overall memory).

1214 1215 1216 1217 1218 1219
- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
  an existing .py counterpart, override the co_filename attributes of all
  code objects if the original filename is obsolete (which can happen if the
  file has been renamed, moved, or if it is accessed through different paths).
  Patch by Ziga Seilnacht and Jean-Paul Calderone.

1220 1221 1222 1223
- Issue #4580: Fix slicing of memoryviews when the item size is greater than
  one byte. Also fixes the meaning of len() so that it returns the number of
  items, rather than the size in bytes.

1224 1225
- Issue #4075: Use OutputDebugStringW in Py_FatalError.

1226 1227 1228
- Issue #4747: When the terminal does not use utf-8, executing a script with
  non-ascii characters in its name could fail with a "SyntaxError: None" error.

1229
- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
1230
  file with `bytes' filename on Windows.
1231

1232 1233 1234
- Issue #3680: Reference cycles created through a dict, set or deque iterator
  did not get collected.

1235 1236 1237
- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
  where the tp_hash and tp_dict slots are both NULL.

1238 1239 1240
- Issue #4759: None is now allowed as the first argument of
  bytearray.translate().  It was always allowed for bytes.translate().

1241 1242 1243
- Added test case to ensure attempts to read from a file opened for writing
  fail.

1244 1245
- Issue #3106: Speedup some comparisons (str/str and int/int).

1246 1247 1248
- Issue #2183: Simplify and optimize bytecode for list, dict and set
  comprehensions. Original patch for list comprehensions by Neal Norwitz.

1249 1250 1251 1252
- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
  print elapsed times, not only when some objects are uncollectable /
  unreachable. Original patch by Neil Schemenauer.

1253 1254
- Issue #3439: Add a bit_length method to int.

1255 1256 1257 1258
- Issue #2173: When getting device encoding, check that return value of
  nl_langinfo is not the empty string.  This was causing silent build
  failures on OS X.

1259 1260 1261 1262
- Issue #4597: Fixed several opcodes that weren't always propagating
  exceptions.

- Issue #4589: Fixed exception handling when the __exit__ function of a
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  context manager returns a value that cannot be converted to a bool.

1265 1266 1267 1268 1269
- Issue #4445: Replace "sizeof(PyBytesObject)" with
  "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
  bytes instances.  On a typical machine this saves 3 bytes of memory
  (on average) per allocation of a bytes instance.

1270 1271 1272 1273
- Issue #4533: File read operation was dreadfully slow due to a slowly
  growing read buffer. Fixed by using the same growth rate algorithm as
  Python 2.x.

1274 1275 1276
- Issue #4509: Various issues surrounding resize of bytearray objects to
  which there are buffer exports (e.g. memoryview instances).

1277 1278 1279 1280
- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
  method on file objects with closefd=False. The file descriptor is still
  kept open but the file object behaves like a closed file. The ``FileIO``
  object also got a new readonly attribute ``closefd``.
1281

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- Issue #4569: Interpreter crash when mutating a memoryview with an item size
  larger than 1.

1285 1286
- Issue #4748: Lambda generators no longer return a value.

1287 1288
- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.

1289 1290 1291 1292 1293
- Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
  PyUnicode_DecodeUTF8() once, remember the result and output it in a second
  step. This avoids problems with counting UTF-8 bytes that ignores the effect
  of using the replace error handler in PyUnicode_DecodeUTF8().

Barry Warsaw's avatar
Barry Warsaw committed
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Library
-------
1296

1297 1298 1299
- Issue #7071: byte-compilation in Distutils is now done with respect to
  sys.dont_write_bytecode.

1300 1301 1302
- Issue #7066: archive_util.make_archive now restores the cwd if an error is 
  raised. Initial patch by Ezio Melotti.

1303
- Issue #6516: Added owner/group support when creating tar archives in
1304 1305
  Distutils.

1306 1307
- Issue #6954: Fixed crash when using DISTUTILS_DEBUG flag in Distutils.

1308 1309 1310 1311
- Issue #6163: Fixed HP-UX runtime library dir options in
  distutils.unixcompiler. Initial patch by Sridhar Ratnakumar and
  Michael Haubenwallner.

1312 1313
- Issue #6693: New functions in site.py to get user/global site packages paths.

1314 1315 1316 1317
- Issue #6511: ZipFile now raises BadZipfile (instead of an IOError) when
  opening an empty or very small file.

- Issue #6545: Removed assert statements in distutils.Extension, so the
1318 1319
  behavior is similar when used with -O.

1320 1321
- unittest has been split up into a package.  All old names should still work.

1322 1323 1324 1325 1326
- Issue #6466: now distutils.cygwinccompiler and distutils.emxccompiler
  uses the same refactored function to get gcc/ld/dllwrap versions numbers.
  It's `distutils.util.get_compiler_versions`. Added deprecation warnings
  for the obsolete get_versions() functions.

1327 1328 1329 1330 1331 1332 1333
- Issue #6433: fixed issues with multiprocessing.pool.map hanging on empty list

- Issue #6314: logging: Extra checks on the "level" argument in more places.

- Issue #2622: Fixed an ImportError when importing email.messsage from a
  standalone application built with py2exe or py2app.

1334
- Issue #6455: Fixed test_build_ext under win32.
1335

1336
- Issue #6377: Enabled the compiler option, and deprecate its usage as an
1337 1338
  attribute.

1339 1340
- Issue #6413: Fixed the log level in distutils.dist for announce.

1341 1342
- Issue #6403: Fixed package path usage in build_ext.

1343 1344 1345 1346
- Issues #5155, 5313, 5331: multiprocessing.Process._bootstrap was
  unconditionally calling "os.close(sys.stdin.fileno())" resulting in file
  descriptor errors

1347
- Issue #6365: Distutils build_ext inplace mode was copying the compiled
1348 1349
  extension in a subdirectory if the extension name had dots.

1350
- Issue #6164: Added an AIX specific linker argument in Distutils
1351 1352
  unixcompiler. Original patch by Sridhar Ratnakumar.

1353 1354 1355
- Issue #6286: Now Distutils upload command is based on urllib2 instead of
  httplib, allowing the usage of http_proxy.

1356 1357
- Issue #6287: Added the license field in Distutils documentation.

1358 1359
- Issue #6263: Fixed syntax error in distutils.cygwincompiler.

1360 1361 1362 1363
- Issue #5201: distutils.sysconfig.parse_makefile() now understands `$$`
  in Makefiles. This prevents compile errors when using syntax like:
  `LDFLAGS='-rpath=\$$LIB:/some/other/path'`. Patch by Floris Bruynooghe.

1364 1365 1366
- Issue #6131: test_modulefinder leaked when run after test_distutils.
  Patch by Hirokazu Yamamoto.

1367 1368
- Issue #6048: Now Distutils uses the tarfile module in archive_util.

1369
- Issue #6062: In distutils, fixed the package option of build_ext. Feedback
1370 1371
  and tests on pywin32 by Tim Golden.

1372 1373
- Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.

1374 1375 1376
- Issue #6046: Fixed the library extension when distutils build_ext is used
  inplace. Initial patch by Roumen Petrov.

1377
- Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
1378 1379
  subcommand.

1380 1381 1382
- Issue #6022: a test file was created in the current working directory by
  test_get_outputs in Distutils.

1383 1384 1385
- Issue #5977: distutils build_ext.get_outputs was not taking into account the
  inplace option. Initial patch by kxroberto.

1386 1387 1388
- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
  for old-style extensions.

1389 1390
- Issue #5976: Fixed Distutils test_check_environ.

1391 1392 1393 1394 1395
- Issue #5941: Distutils build_clib command was not working anymore because
  of an incomplete costumization of the archiver command. Added ARFLAGS in the
  Makefile besides AR and make Distutils use it. Original patch by David
  Cournapeau.

1396 1397
- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.

1398
- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
1399 1400
  anymore.

1401
- Issue #5810: Fixed Distutils test_build_scripts so it uses
1402 1403
  sysconfig.get_config_vars.

1404 1405
- Issue #4951: Fixed failure in test_httpservers.

Thomas Heller's avatar
Thomas Heller committed
1406 1407
- Issue #5795: Fixed test_distutils failure on Debian ppc.

1408 1409
- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.

1410 1411 1412
- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
  a value in SafeConfigParser.

1413 1414
- Issue #5732: added a new command in Distutils: check.

1415
- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
1416 1417
  platforms. Initial patch by Paul Moore.

1418 1419 1420
- Issue #5095: Added bdist_msi to the list of bdist supported formats.
  Initial fix by Steven Bethard.

1421 1422 1423
- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
  Initial fix by Wayne Davison.

1424
- Issue #5694: removed spurious test output in Distutils (test_clean).
1425

1426
- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
1427

1428 1429 1430 1431
- Issue #1665206 (partially): Move imports in cgitb to the top of the module
  instead of performing them in functions. Helps prevent import deadlocking in
  threads.

1432 1433 1434 1435
- Issue #2522: locale.format now checks its first argument to ensure it has
  been passed only one pattern, avoiding mysterious errors where it appeared
  that it was failing to do localization.

1436 1437 1438
- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
  Brandl.

1439 1440 1441
- Issue #1222: locale.format() bug when the thousands separator is a space
  character.

1442 1443 1444
- Issue #5472: Fixed distutils.test_util tear down. Original patch by
  Tim Golden.

1445 1446
- collections.deque() objects now have a read-only attribute called maxlen.

1447 1448 1449 1450
- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
  it is has been populated and properly configured in order to prevent
  window flashing.

1451 1452 1453 1454 1455 1456
- Issue #4792: Prevent a segfault in _tkinter by using the
  guaranteed to be safe interp argument given to the PythonCmd in place of
  the Tcl interpreter taken from a PythonCmd_ClientData.

- Issue #5193: Guarantee that tkinter.Text.search returns a string.

1457 1458 1459
- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
  Original patch by Akira Kitada.

1460 1461
- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.

1462 1463
- Issue #5385: Fixed mmap crash after resize failure on windows.

1464 1465
- Issue #5179: Fixed subprocess handle leak on failure on windows.

Raymond Hettinger's avatar
Raymond Hettinger committed
1466 1467
- PEP 372:  Added collections.OrderedDict().

1468 1469
- The _asdict() for method for namedtuples now returns an OrderedDict().

1470 1471
- configparser now defaults to using an ordered dictionary.

Benjamin Peterson's avatar
Benjamin Peterson committed
1472 1473 1474
- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
  import guess_extension`` was used.

1475 1476 1477
- Issue #1733986: Fixed mmap crash in accessing elements of second map object
  with same tagname but larger size than first map. (Windows)

1478 1479 1480
- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
  overrun.

1481 1482 1483 1484 1485
- Issue #1533164: Installed but not listed *.pyo was breaking Distutils
  bdist_rpm command.

- Issue #5378: added --quiet option to Distutils bdist_rpm command.

1486 1487
- Issue #5052: make Distutils compatible with 2.3 again.

1488 1489
- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
  in Distutils tests.
Barry Warsaw's avatar
Barry Warsaw committed
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1491 1492 1493
- Issue #5287: Add exception handling around findCaller() call to help out
  IronPython.

1494 1495 1496 1497 1498
- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
  The file was resized to wrong size.

- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].

1499
- Issue #2279: distutils.sdist.add_defaults now add files
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  from the package_data and the data_files metadata.

1502
- Issue #5257: refactored all tests in distutils, so they use
1503 1504
  support.TempdirManager, to avoid writing in the tests directory.

1505 1506 1507
- Issue #4524: distutils build_script command failed with --with-suffix=3.
  Initial patch by Amaury Forgeot d'Arc.

1508 1509
- Issue #2461: added tests for distutils.util

1510 1511 1512 1513
- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
  which inherited from numbers.py which did not have __slots__ defined.  The
  numbers hierarchy now has its own __slots__ declarations.

1514 1515 1516
- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
  encoding.

1517 1518 1519
- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
  function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).

1520 1521 1522
- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
  under NT and OS2. Patch by Philip Jenvey.

1523 1524 1525 1526
- Issue #5128: Make compileall properly inspect bytecode to determine if needs
  to be recreated. This avoids a timing hole thanks to the old reliance on the
  ctime of the files involved.

1527 1528 1529
- Issue #5122: Synchronize tk load failure check to prevent a potential
  deadlock.

1530 1531 1532 1533
- Issue #1818: collections.namedtuple() now supports a keyword argument
  'rename' which lets invalid fieldnames be automatically converted to
  positional names in the form, _1, _2, ...

1534 1535
- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.

1536 1537 1538
- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
  public documented method ``ZipImporter.get_filename()``.

1539 1540 1541 1542 1543
- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
  the execution of packages by looking for and executing a ``__main__``
  submodule when a package name is supplied. Initial patch by Andi
  Vajda.

1544 1545 1546 1547 1548
- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
  not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
  Tkapp_Call when calling from a thread different than the one that created
  the Tcl interpreter. Patch by Robert Hancock.

1549 1550 1551
- Issue #4285: Change sys.version_info to be a named tuple. Patch by
  Ross Light.

1552
- Issue #1520877: Now distutils.sysconfig reads $AR from the
1553 1554
  environment/Makefile. Patch by Douglas Greiman.

1555 1556 1557
- Issue #1276768: The verbose option was not used in the code of
  distutils.file_util and distutils.dir_util.

1558
- Issue #5132: Fixed trouble building extensions under Solaris with
1559 1560
  --enabled-shared activated. Initial patch by Dave Peterson.

1561 1562
- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.

1563 1564
- The shelve module now defaults to pickle protocol 3.

1565 1566 1567
- Fix a bug in the trace module where a bytes object from co_lnotab had its
  items being passed through ord().

1568 1569 1570 1571
- Issue #2047: shutil.move() could believe that its destination path was
  inside its source path if it began with the same letters (e.g. "src" vs.
  "src.new").

1572 1573
- Added the ttk module. See issue #2983: Ttk support for Tkinter.

1574 1575 1576 1577
- Removed isSequenceType(), isMappingType, and isNumberType() from the
  operator module; use the abstract base classes instead.  Also removed
  the repeat() function; use mul() instead.

1578
- Issue #5021:  doctest.testfile() did not create __name__ and
1579 1580 1581 1582 1583
  collections.namedtuple() relied on __name__ being defined.

- Backport importlib from Python 3.1. Only the import_module() function has
  been backported to help facilitate transitions from 2.7 to 3.1.

1584 1585 1586
- Issue #1885: distutils. When running sdist with --formats=tar,gztar
  the tar file was overriden by the gztar one.

1587 1588
- Issue #4863: distutils.mwerkscompiler has been removed.

1589 1590
- Added a new itertools functions:  combinations_with_replacement()
  and compress().
1591

1592
- Issue #5032:  added a step argument to itertools.count() and
1593 1594
  allowed non-integer arguments.

Jesse Noller's avatar
Jesse Noller committed
1595 1596 1597 1598
- Fix and properly document the multiprocessing module's logging
  support, expose the internal levels and provide proper usage
  examples.

1599 1600 1601
- Issue #1672332: fix unpickling of subnormal floats, which was
  producing a ValueError on some platforms.

1602 1603 1604
- Issue #3881: Help Tcl to load even when started through the
  unreadable local symlink to "Program Files" on Vista.

1605 1606 1607
- Issue #4710: Extract directories properly in the zipfile module;
  allow adding directories to a zipfile.

1608
- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller's avatar
Jesse Noller committed
1609 1610 1611
  --without-threads argument. When this occurs, _multiprocessing will
  be disabled, and not compiled.

1612 1613 1614 1615 1616
- Issue #5008: When a file is opened in append mode with the new IO library,
  do an explicit seek to the end of file (so that e.g. tell() returns the
  file size rather than 0). This is consistent with the behaviour of the
  traditional 2.x file object.

1617 1618 1619
- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
  parameter was set.

1620 1621 1622
- Issue #4842: Always append a trailing 'L' when pickling longs using
  pickle protocol 0.  When reading, the 'L' is optional.

1623 1624
- Add the importlib package.

Jesse Noller's avatar
Jesse Noller committed
1625 1626 1627
- Issue #4301: Patch the logging module to add processName support, remove
  _check_logger_class from multiprocessing.

1628
- Issue #3325: Remove python2.x try: except: imports for old cPickle from
1629
  multiprocessing.
1630

1631 1632 1633
- Issue #4959: inspect.formatargspec now works for keyword only arguments
  without defaults.

Jesse Noller's avatar
Jesse Noller committed
1634 1635 1636 1637
- Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
  for *nix machines for negative handles and large int handles. Without this check
  it is possible to segfault the interpreter.

1638 1639 1640 1641 1642 1643
- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
  in sharedctypes.py.

- Issue #1225107: inspect.isclass() returned True for instances with a custom
  __getattr__.

1644 1645 1646 1647
- Issue #3826 and #4791: The socket module now closes the underlying socket
  appropriately when it is being used via socket.makefile() objects
  rather than delaying the close by waiting for garbage collection to do it.

1648 1649 1650
- Issue #1696199:  Add collections.Counter() for rapid and convenient
  counting.

1651 1652
- Issue #3860: GzipFile and BZ2File now support the context manager protocol.

1653 1654 1655
- Issue #4867: Fixed a crash in ctypes when passing a string to a
  function without defining argtypes.

1656 1657 1658 1659 1660
- Issue #4272: Add an optional argument to the GzipFile constructor to override
  the timestamp in the gzip stream. The default value remains the current time.
  The information can be used by e.g. gunzip when decompressing. Patch by
  Jacques Frechet.

1661 1662
- Restore Python 2.3 compatibility for decimal.py.

1663 1664 1665
- Issue #3638: Remove functions from _tkinter module level that depend on
  TkappObject to work with multiple threads.

1666 1667
- Issue #4718: Adapt the wsgiref package so that it actually works with
  Python 3.x, in accordance with the `official amendments of the spec
1668 1669
  <http://www.wsgi.org/wsgi/Amendments_1.0>`_.

1670 1671 1672
- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
  to the decimal module.

1673 1674 1675
- Fractions.from_float() no longer loses precision for integers too big to
  cast as floats.

1676 1677 1678
- Issue #4812: add missing underscore prefix to some internal-use-only
  constants in the decimal module.  (Dec_0 becomes _Dec_0, etc.)

1679
- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
1680 1681
  did unnecessary work in the common case where no key function was specified.

1682 1683 1684
- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
  the function is not a generator.

1685 1686
- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
  no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
1687

1688
- Issue #4646: distutils was choking on empty options arg in the setup
1689 1690
  function. Original patch by Thomas Heller.

1691 1692
- Issue #3767: Convert Tk object to string in tkColorChooser.

1693 1694
- Issue #3248: Allow placing ScrolledText in a PanedWindow.

1695 1696 1697
- Issue #4444: Allow assertRaises() to be used as a context handler, so that
  the code under test can be written inline if more practical.

1698 1699 1700
- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
  works as expected in the interactive environment.

1701 1702 1703
- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
  Gabriel Genellina.

1704 1705 1706
- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
  boundary.

1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725
- Issue #4223: inspect.getsource() will now correctly display source code
  for packages loaded via zipimport (or any other conformant PEP 302
  loader). Original patch by Alexander Belopolsky.

- Issue #4201: pdb can now access and display source code loaded via
  zipimport (or any other conformant PEP 302 loader). Original patch by
  Alexander Belopolsky.

- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
  302 conformant loader) will now work correctly in most cases (they
  are still subject to the constraints that exist for all code running
  from inside a module loaded via a PEP 302 loader and attempting to
  perform IO operations based on __file__). Original patch by
  Alexander Belopolsky.

- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
  allows backporting to maintenance branches. Original patch by
  Alexander Belopolsky.

1726 1727 1728
- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
  a non-ASCII letter.

1729 1730
- Issue #4616: TarFile.utime(): Restore directory times on Windows.

1731 1732 1733
- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
  codec cannot be found.  This is for compatibility with the builtin behavior.

1734 1735 1736 1737
- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
  give correct results in the case where one argument is a quiet NaN
  and the other is a finite number that requires rounding.

1738 1739 1740
- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
  libs.

1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756
- Added the subprocess.check_call_output() convenience function to get output
  from a subprocess on success or raise an exception on error.

- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
  support unusual filenames (such as those containing semi-colons) in
  Content-Disposition headers.

- Issue #4384: Added logging integration with warnings module using
  captureWarnings(). This change includes a NullHandler which does nothing;
  it will be of use to library developers who want to avoid the "No handlers
  could be found for logger XXX" message which can appear if the library user
  doesn't configure logging.

- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
  exception.

1757 1758 1759 1760 1761 1762 1763 1764 1765
- Issue #4529: fix the parser module's validation of try-except-finally
  statements.

- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
  not a malformed option.

- Added the subprocess.check_output() convenience function to get output
  from a subprocess on success or raise an exception on error.

1766 1767 1768
- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
  the corresponding tests now pass.

1769 1770 1771
- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
  it was calling the wrong open() function.

1772 1773 1774 1775
- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
  support unusual filenames (such as those containing semi-colons) in
  Content-Disposition headers.

1776 1777 1778
- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
  biarch systems. Try to rely on ldconfig only, without using objdump and gcc.

Benjamin Peterson's avatar
Benjamin Peterson committed
1779 1780 1781 1782
- Issue #5104: The socket module now raises OverflowError when 16-bit port and
  protocol numbers are supplied outside the allowed 0-65536 range on bind()
  and getservbyport().

1783 1784
- Windows locale mapping updated to Vista.

1785 1786 1787
Tools/Demos
-----------

1788 1789 1790
- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
  and make it 2.6-compatible.

1791 1792
- Ttk demos added in Demo/tkinter/ttk/

1793 1794
- Issue #4677: add two list comprehension tests to pybench.

1795 1796 1797 1798

Build
-----

1799 1800
- Issue #6094: Build correctly with Subversion 1.7.

1801 1802
- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.

1803 1804 1805
- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
  linker, rather than always exit successfully. Patch by Floris Bruynooghe.

1806
- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
1807
  the order that backends for the dbm extension are checked.
1808

1809 1810
- Link the shared python library with $(MODLIBS).

1811 1812
- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.

1813 1814
- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.

1815 1816
- Issue #4895: Use _strdup on Windows CE.

1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840
- Issue #4472: "configure --enable-shared" now works on OSX

- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.

- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".

- Issue #4289: Remove Cancel button from AdvancedDlg.

- Issue #1656675: Register a drop handler for .py* files on Windows.

- Issue #4120: Exclude manifest from extension modules in VS2008.

- Issue #4091: Install pythonxy.dll in system32 again.

- Issue #4018: Disable "for me" installations on Vista.

- Issue #3758: Add ``patchcheck`` build target to .PHONY.

- Issue #4204: Fixed module build errors on FreeBSD 4.


C-API
-----

1841 1842 1843
- Issue #6624: yArg_ParseTuple with "s" format when parsing argument with
  NUL: Bogus TypeError detail string.

1844 1845 1846
- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
  for negative arguments.  Previously, it raised TypeError.

1847 1848 1849 1850 1851 1852 1853 1854 1855
- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.

- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
  the GIL is released, or owned by another thread.

- Issue #4122: On Windows, fix a compilation error when using the
  Py_UNICODE_ISSPACE macro in an extension module.


1856 1857 1858
Extension Modules
-----------------

1859 1860 1861 1862
- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
  supporting objects as input no matter how it was compiled (built in
  implementations or external openssl library).

1863 1864
- Issue #4397: Fix occasional test_socket failure on OS X.

1865 1866
- Issue #4279: Fix build of parsermodule under Cygwin.

1867 1868 1869 1870
- Issue #4751: hashlib now releases the GIL when hashing large buffers
  (with a hardwired threshold of 2048 bytes), allowing better parallelization
  on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.

1871 1872
- Issue #4051: Prevent conflict of UNICODE macros in cPickle.

1873 1874 1875 1876
- Issue #4738: Each zlib object now has a separate lock, allowing to compress
  or decompress several streams at once on multi-CPU systems. Also, the GIL
  is now released when computing the CRC of a large buffer. Patch by ebfe.

1877 1878
- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.

1879 1880
- Issue #1040026: Fix os.times result on systems where HZ is incorrect.

1881 1882
- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
  OpenBSD.
1883

1884 1885 1886 1887
- Issue #4583: array.array would not always prohibit resizing when a buffer
  has been exported, resulting in an interpreter crash when accessing the
  buffer.

1888

1889 1890
- Issue #5228: Make functools.partial objects can now be pickled.

1891 1892 1893
Tests
-----

1894 1895 1896
- Issue #6152: New option '-j'/'--multiprocess' for regrtest allows running
  regression tests in parallel, shortening the total runtime.

1897 1898 1899 1900 1901
- Issue #5450: Moved tests involving loading tk from Lib/test/test_tcl to
  Lib/tkinter/test/test_tkinter/test_loadtk. With this, these tests demonstrate
  the same behaviour as test_ttkguionly (and now also test_tk) which is to
  skip the tests if DISPLAY is defined but can't be used.

1902
- regrtest no longer treats ImportError as equivalent to SkipTest.  Imports
1903
  that should cause a test to be skipped are now done using import_module
1904 1905
  from test support, which does the conversion.

1906 1907 1908
- Issue #5083: New 'gui' resource for regrtest.


1909 1910 1911
Docs
----

1912

1913
**(For information about older versions, consult the HISTORY file.)**