5 What's New in Python 3.1.3?
6 ===========================
8 *Release date: 2010-11-27*
13 - Issue #10391: Don't dereference invalid memory in error messages in the ast
19 - Issue #10459: Update CJK character names to Unicode 5.1.
21 - Issue #10092: Properly reset locale in calendar.Locale*Calendar classes.
23 - Issue #6098: Don't claim DOM level 3 conformance in minidom.
25 - Issue #5762: Fix AttributeError raised by ``xml.dom.minidom`` when an empty
26 XML namespace attribute is encountered.
28 - Issue #1710703: Write structures for an empty ZIP archive when a ZipFile is
29 created in modes 'a' or 'w' and then closed without adding any files. Raise
30 BadZipfile (rather than IOError) when opening small non-ZIP files.
32 - Issue #4493: urllib.request adds '/' in front of path components which does not
33 start with '/. Common behavior exhibited by browsers and other clients.
35 - Issue #6378: idle.bat now runs with the appropriate Python version rather than
36 the system default. Patch by Sridhar Ratnakumar.
38 - Issue #10407: Fix two NameErrors in distutils.
40 - Issue #10198: fix duplicate header written to wave files when writeframes()
41 is called without data.
43 - Issue #10467: Fix BytesIO.readinto() after seeking into a position after the
46 - Issue #1682942: configparser supports alternative option/value delimiters.
51 - Backport r83399 to allow test_distutils to pass on installed versions.
53 - Issue #1303434: Generate ZIP file containing all PDBs (already done for rc1).
55 - Stop packaging versioncheck tool (already done for rc1).
57 - Accept Oracle Berkeley DB 4.8, 5.0 and 5.1 as backend for the dbm extension.
62 - Issue #9424: Replace deprecated assert* methods in the Python test suite.
67 - Issue #10299: List the built-in functions in a table in functions.rst.
70 What's New in Python 3.1.3 release candidate 1?
71 ===============================================
73 *Release date: 2010-11-13*
78 - Issue #10221: dict.pop(k) now has a key error message that includes the
79 missing key (same message d[k] returns for missing keys).
81 - Issue #5437: A preallocated MemoryError instance should not hold traceback
82 data (including local variables caught in the stack trace) alive infinitely.
84 - Issue #10077: Fix logging of site module errors at startup.
86 - Issue #10186: Fix the SyntaxError caret when the offset is equal to the length
87 of the offending line.
89 - Issue #9713, #10114: Parser functions (eg. PyParser_ASTFromFile) expects
90 filenames encoded to the filesystem encoding with surrogateescape error
91 handler (to support undecodable bytes), instead of UTF-8 in strict mode.
93 - Issue #10006: type.__abstractmethods__ now raises an AttributeError. As a
94 result metaclasses can now be ABCs (see #9533).
96 - Issue #9997: Don't let the name "top" have special significance in scope
99 - Issue #9930: Remove bogus subtype check that was causing (e.g.)
100 float.__rdiv__(2.0, 3) to return NotImplemented instead of the
103 - Issue #9804: ascii() now always represents unicode surrogate pairs as
104 a single ``\UXXXXXXXX``, regardless of whether the character is printable
105 or not. Also, the "backslashreplace" error handler now joins surrogate
106 pairs into a single character on UCS-2 builds.
108 - Issue #9797: pystate.c wrongly assumed that zero couldn't be a valid
109 thread-local storage key.
111 - Issue #9737: Fix a crash when trying to delete a slice or an item from
114 - Issue #7415: PyUnicode_FromEncodedObject() now uses the new buffer API
115 properly. Patch by Stefan Behnel.
117 - Restore GIL in nis_cat in case of error.
119 - Issue #9712: Fix tokenize on identifiers that start with non-ascii names.
121 - Issue #9688: __basicsize__ and __itemsize__ must be accessed as Py_ssize_t.
123 - Issue #5319: Print an error if flushing stdout fails at interpreter
126 - Issue #8814: function annotations (the ``__annotations__`` attribute)
127 are now included in the set of attributes copied by default by
128 functools.wraps and functools.update_wrapper. Patch by Terrence Cole.
130 - Issue #83755: Implicit set-to-frozenset conversion was not thread-safe.
132 - Issue #10068: Global objects which have reference cycles with their module's
133 dict are now cleared again. This causes issue #7140 to appear again.
135 - Issue #9416: Fix some issues with complex formatting where the
136 output with no type specifier failed to match the str output:
138 - format(complex(-0.0, 2.0), '-') omitted the real part from the output,
139 - format(complex(0.0, 2.0), '-') included a sign and parentheses.
141 - Issue #7616: Fix copying of overlapping memoryview slices with the Intel
144 - Issue #8271: during the decoding of an invalid UTF-8 byte sequence, only the
145 start byte and the continuation byte(s) are now considered invalid, instead
146 of the number of bytes specified by the start byte.
147 E.g.: '\xf1\x80AB'.decode('utf-8', 'replace') now returns u'\ufffdAB' and
148 replaces with U+FFFD only the start byte ('\xf1') and the continuation byte
149 ('\x80') even if '\xf1' is the start byte of a 4-bytes sequence.
150 Previous versions returned a single u'\ufffd'.
152 - Issue #6543: Write the traceback in the terminal encoding instead of utf-8.
153 Fix the encoding of the modules filename. Patch written by Amaury Forgeot
156 - Issue #9058: Remove assertions about INT_MAX in UnicodeDecodeError.
158 - Issue #8941: decoding big endian UTF-32 data in UCS-2 builds could crash
159 the interpreter with characters outside the Basic Multilingual Plane
160 (higher than 0x10000).
162 - In the str.format(), raise a ValueError when indexes to arguments are too
165 - Issue #8766: Initialize _warnings module before importing the first module.
166 Fix a crash if an empty directory called "encodings" exists in sys.path.
168 - PyObject_Dump() encodes unicode objects to utf8 with backslashreplace
169 (instead of strict) error handler to escape surrogates
171 - Issue #8124: PySys_WriteStdout() and PySys_WriteStderr() don't execute
172 indirectly Python signal handlers anymore because mywrite() ignores
173 exceptions (KeyboardInterrupt)
175 - Issue #8092: Fix PyUnicode_EncodeUTF8() to support error handler producing
176 unicode string (eg. backslashreplace)
178 - Issue #8014: Setting a T_UINT or T_PYSSIZET attribute of an object with
179 PyMemberDefs could produce an internal error; raise TypeError instead.
181 - Issue #8417: Raise an OverflowError when an integer larger than sys.maxsize is
182 passed to bytes or bytearray.
184 - Issue #8329: Don't return the same lists from select.select when no fds are
187 - Raise a TypeError when trying to delete a T_STRING_INPLACE struct member.
189 - Issue #8226: sys.setfilesystemencoding() raises a LookupError if the encoding
192 - Issue #1583863: An str subclass can now override the __str__ method
194 - Issue #7072: isspace(0xa0) is true on Mac OS X
199 - Issue #9834: Don't segfault in PySequence_GetSlice, PySequence_SetSlice, or
200 PySequence_DelSlice when the object doesn't have any mapping operations
203 - Issue #5753: A new C API function, :cfunc:`PySys_SetArgvEx`, allows
204 embedders of the interpreter to set sys.argv without also modifying
205 sys.path. This helps fix `CVE-2008-5983
206 <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5983>`_.
211 - Issue #5111: IPv6 Host in the Header is wrapped inside [ ]. Patch by Chandru.
213 - Issue #4471: Properly shutdown socket in IMAP.shutdown(). Patch by
216 - Fix IMAP.login() to work properly.
218 - Issue #10126: Fix distutils' test_build when Python was built with
221 - Fix typo in one sdist option (medata-check).
223 - Issue #9199: Fix incorrect use of distutils.cmd.Command.announce.
225 - Issue #1718574: Fix options that were supposed to accept arguments but did
228 - Issue #9281: Prevent race condition with mkdir in distutils. Patch by
231 - Issue #10229: Fix caching error in gettext.
233 - Issue #10252: Close file objects in a timely manner in distutils code and
234 tests. Patch by Brian Brazil, completed by Éric Araujo.
236 - Issue #10311: The signal module now restores errno before returning from
237 its low-level signal handler. Patch by Hallvard B Furuseth.
239 - The keyword only restriction for the places argument in
240 unittest.TestCase.assert[Not]AlmostEqual methods has been removed.
242 - Issue 6706: asyncore accept() method no longer raises EWOULDBLOCK/ECONNABORTED
243 on incomplete connection attempt but returns None instead.
245 - Issue #10266: uu.decode didn't close in_file explicitly when it was given
246 as a filename. Patch by Brian Brazil.
248 - Issue #10246: uu.encode didn't close file objects explicitly when filenames
249 were given to it. Patch by Brian Brazil.
251 - Issue #10253: FileIO leaks a file descriptor when trying to open a file
252 for append that isn't seekable. Patch by Brian Brazil.
254 - Issue #5027: The standard ``xml`` namespace is now understood by
255 xml.sax.saxutils.XMLGenerator as being bound to
256 http://www.w3.org/XML/1998/namespace. Patch by Troy J. Farrell.
258 - #7761: telnetlib.interact failures on Windows fixed.
260 - Issue #5117: Case normalization was needed on ntpath.relpath(). And
261 fixed root directory issue on posixpath.relpath(). (Ported working fixes
264 - Issue #10041: The signature of optional arguments in socket.makefile()
265 didn't match that of io.open(), and they also didn't get forwarded
266 properly to TextIOWrapper in text mode. Patch by Kai Zhu.
268 - Issue #6612: Fix site and sysconfig to catch os.getcwd() error, eg. if the
269 current directory was deleted. Patch written by W. Trevor King.
271 - Issue #9759: GzipFile now raises ValueError when an operation is attempted
272 after the file is closed. Patch by Jeffrey Finkelstein.
274 - Issue #9042: Fix interaction of custom translation classes and caching in
277 - Issue #9065: tarfile no longer uses "root" as the default for the uname and
280 - Issue #8980: Fixed a failure in distutils.command check that was shadowed
281 by an environment that does not have docutils. Patch by Arfrever.
283 - Issue #1050268: parseaddr now correctly quotes double quote and backslash
284 characters that appear inside quoted strings in email addresses.
286 - Issue #10004: quoprimime no longer generates a traceback when confronted
287 with invalid characters after '=' in a Q-encoded word.
289 - Issue #9950: Fix socket.sendall() crash or misbehaviour when a signal is
290 received. Now sendall() properly calls signal handlers if necessary,
291 and retries sending if these returned successfully, including on sockets
294 - Issue #9936: Fixed executable lines' search in the trace module.
296 - Issue #9928: Properly initialize the types exported by the bz2 module.
298 - Issue #9854: The default read() implementation in io.RawIOBase now
299 handles non-blocking readinto() returning None correctly.
301 - Issue #9853: Fix the signature of SSLSocket.recvfrom() and
302 SSLSocket.sendto() to match the corresponding socket methods.
304 - Issue #9792: In case of connection failure, socket.create_connection()
305 would swallow the exception and raise a new one, making it impossible
306 to fetch the original errno, or to filter timeout errors. Now the
307 original error is re-raised.
309 - Issue #9826: OrderedDict.__repr__ can now handle self-referential
312 - Issue #9758: When fcntl.ioctl() was called with mutable_flag set to True,
313 and the passed buffer was exactly 1024 bytes long, the buffer wouldn't
314 be updated back after the system call. Original patch by Brian Brazil.
316 - Issue #6656: fix locale.format_string to handle escaped percents
319 - Issue #1100562: Fix deep-copying of objects derived from the list and
320 dict types. Patch by Michele Orrù and Björn Lindqvist.
322 - Issue #9753: Fixed socket.dup, which did not always work correctly
325 - Issue #1868: Eliminate subtle timing issues in thread-local objects by
326 getting rid of the cached copy of thread-local attribute dictionary.
328 - Issue #8797: urllib2 does a retry for Basic Authentication failure instead of
329 falling into recursion.
331 - Issue #1194222: email.utils.parsedate now returns RFC2822 compliant four
332 character years even if the message contains RFC822 two character years.
334 - Issue #8750: Fixed MutableSet's methods to correctly handle
335 reflexive operations, namely x -= x and x ^= x.
337 - Issue #9129: smtpd.py is vulnerable to DoS attacks deriving from missing
338 error handling when accepting a new connection.
340 - Issue #658749: asyncore's connect() method now correctly interprets winsock
343 - Issue #9214: Set operations on KeysView or ItemsView in the collections
344 module now correctly return a set. (Patch by Eli Bendersky.)
346 - Issue #9617: Signals received during a low-level write operation aren't
347 ignored by the buffered IO layer anymore.
349 - Issue #9605: posix.getlogin() decodes the username with file filesystem
350 encoding and surrogateescape error handler. Patch written by David Watson.
352 - Issue #9603: posix.ttyname() and posix.ctermid() decode the terminal name
353 using the filesystem encoding and surrogateescape error handler. Patch
354 written by David Watson.
356 - Issue #8688: MANIFEST files created by distutils now include a magic
357 comment indicating they are generated. Manually maintained MANIFESTs
358 without this marker will not be overwritten or removed.
360 - Issue #7467: when reading a file from a ZIP archive, its CRC is checked
361 and a BadZipfile error is raised if it doesn't match (as used to be the
362 case in Python 2.5 and earlier).
364 - Issue #9550: a BufferedReader could issue an additional read when the
365 original read request had been satisfied, which could block indefinitely
366 when the underlying raw IO channel was e.g. a socket. Report and original
367 patch by Jason V. Miller.
369 - Issue #6915: Under Windows, os.listdir() didn't release the Global
370 Interpreter Lock around all system calls. Original patch by Ryan Kelly.
372 - Issue #3757: thread-local objects now support cyclic garbage collection.
373 Thread-local objects involved in reference cycles will be deallocated
374 timely by the cyclic GC, even if the underlying thread is still running.
376 - Fix Issue8280 - urllib2's Request method will remove fragements in the url.
377 This is how it is supposed to work, wget and curl do the same. Previous
380 - Issue #2944: asyncore doesn't handle connection refused correctly.
382 - Issue #3196: email header decoding is now forgiving if an RFC2047
383 encoded word encoded in base64 is lacking padding.
385 - Issue #8447: Make distutils.sysconfig follow symlinks in the path to
386 the interpreter executable. This fixes a failure of test_httpservers
389 - Issue #7372: Fix pstats regression when stripping paths from profile
390 data generated with the profile module.
392 - Issue #4108: In urllib.robotparser, if there are multiple 'User-agent: *'
393 entries, consider the first one.
395 - Issue #8397: Raise an error when attempting to mix iteration and regular
396 reads on a BZ2File object, rather than returning incorrect results.
398 - Issue #7909: Do not touch paths with the special prefixes ``\\.\``
399 or ``\\?\`` in ntpath.normpath().
401 - Issue #5294: Fix the behavior of pdb's "continue" command when called
402 in the top-level debugged frame.
404 - Issue #5727: Restore the ability to use readline when calling into pdb
407 - Issue #6719: In pdb, do not stop somewhere in the encodings machinery
408 if the source file to be debugged is in a non-builtin encoding.
410 - Issue #8048: Prevent doctests from failing when sys.displayhook has
413 - Issue #8015: In pdb, do not crash when an empty line is entered as
414 a breakpoint command.
416 - Issue #5146: Handle UID THREAD command correctly in imaplib.
418 - Issue #5147: Fix the header generated for cookie files written by
419 http.cookiejar.MozillaCookieJar.
421 - Issue #8198: In pydoc, output all help text to the correct stream
422 when sys.stdout is reassigned.
424 - Issue #8230: Fix Lib/test/sortperf.py.
426 - Issue #7395: Fix tracebacks in pstats interactive browser.
428 - Issue #1713: Fix os.path.ismount(), which returned true for symbolic links
431 - Issue #8826: Properly load old-style "expires" attribute in http.cookies.
433 - Issue #1690103: Fix initial namespace for code run with trace.main().
435 - Issue #9354: Provide getsockopt() in asyncore's file_wrapper.
437 - Issue #9448: Fix a leak of OS resources (mutexes or semaphores) when
438 re-initializing a buffered IO object by calling its ``__init__`` method.
440 - Issue #8620: when a Cmd is fed input that reaches EOF without a final
441 newline, it no longer truncates the last character of the last command line.
443 - Issue #3704: http.cookiejar was not properly handling URLs with a / in the
446 - Issue #4629: getopt raises an error if an argument ends with = whereas getopt
447 doesn't except a value (eg. --help= is rejected if getopt uses ['help='] long
450 - Issue #7895: platform.mac_ver() no longer crashes after calling os.fork()
452 - Issue #9323: Fixed a bug in trace.py that resulted in loosing the
453 name of the script being traced. Patch by Eli Bendersky.
455 - Issue #9282: Fixed --listfuncs option of trace.py. Thanks Eli
456 Bendersky for the patch.
458 - Issue #1555570: email no longer inserts extra blank lines when a \r\n
459 combo crosses an 8192 byte boundary.
461 - Issue #9243: Fix sndhdr module and add unit tests, contributed by James Lee.
463 - Issue #9137: Fix issue in MutableMapping.update, which incorrectly
464 treated keyword arguments called 'self' or 'other' specially.
466 - Issue #7646: The fnmatch pattern cache no longer grows without bound.
468 - Issue #9136: Fix 'dictionary changed size during iteration'
469 RuntimeError produced when profiling the decimal module. This was
470 due to a dangerous iteration over 'locals()' in Context.__init__.
472 - Fix extreme speed issue in Decimal.pow when the base is an exact
473 power of 10 and the exponent is tiny (for example,
474 Decimal(10) ** Decimal('1e-999999999')).
476 - Issue #9130: Fix validation of relative imports in parser module.
478 - Issue #9128: Fix validation of class decorators in parser module.
480 - Issue #5468: urlencode to handle bytes type and other encodings in its query
481 parameter. Patch by Dan Mahn.
483 - Issue #7673: Fix security vulnerability (CVE-2010-2089) in the audioop
484 module, ensure that the input string length is a multiple of the frame size
486 - Issue #6589: cleanup asyncore.socket_map in case smtpd.SMTPServer constructor
489 - Issue #9075: In the ssl module, remove the setting of a ``debug`` flag
490 on an OpenSSL structure.
492 - Issue #8682: The ssl module now temporary increments the reference count of
493 a socket object got through ``PyWeakref_GetObject``, so as to avoid possible
494 deallocation while the object is still being used.
496 - Issue #1368368: FancyURLOpener class changed to throw an Exception on wrong
497 password instead of presenting an interactive prompt. Older behavior can be
498 obtained by passing retry=True to http_error_xxx methods of FancyURLOpener.
500 - Issue #8203: Fix IDLE Credits dialog: view_file() uses its encoding argument.
502 - Issue #8720: fix regression caused by fix for #4050 by making getsourcefile
503 smart enough to find source files in the linecache.
505 - Issue #5610: feedparser no longer eats extra characters at the end of
506 a body part if the body part ends with a \r\n.
508 - Fix codecs.escape_encode to return the correct consumed size.
510 - Issue #8897: Fix sunau module, use bytes to write the header. Patch written
513 - Issue #6470: Drop UNC prefix in FixTk.
515 - Issue #4768: base64 encoded email body parts were incorrectly stored as
516 binary strings. They are now correctly converted to strings.
518 - Issue #8833: tarfile created hard link entries with a size field != 0 by
521 - Charset.body_encode now correctly handles base64 encoding by encoding
522 with the output_charset before calling base64mime.encode. Passes the
523 tests from 2.x issue #1368247.
525 - Issue #7150: Raise OverflowError if the result of adding or subtracting
526 timedelta from date or datetime falls outside of the MINYEAR:MAXYEAR range.
528 - Issue #4769: Fix main() function of the base64 module, use sys.stdin.buffer
529 and sys.stdout.buffer (instead of sys.stdin and sys.stdout) to use the bytes
532 - Issue #6662: Fix parsing of malformatted charref (&#bad;), patch written by
535 - Issue #6268: Fix seek() method of codecs.open(), don't read or write the BOM
536 twice after seek(0). Fix also reset() method of codecs, UTF-16, UTF-32 and
537 StreamWriter classes.
539 - Issue #8782: Add a trailing newline in linecache.updatecache to the last line
540 of files without one.
542 - Issue #8729: Return NotImplemented from collections.Mapping.__eq__ when
543 comparing to a non-mapping.
545 - Issue #8774: tabnanny uses the encoding cookie (#coding:...) to use the
548 - Issue #7507: Quote "!" in pipes.quote(); it is special to some shells.
550 - Issue #8663: distutils.log emulates backslashreplace error handler. Fix
551 compilation in a non-ASCII directory if stdout encoding is ASCII (eg. if
552 stdout is not a TTY).
554 - Issue #1285086: Speed up urllib.parse functions: quote, quote_from_bytes,
555 unquote, unquote_to_bytes.
557 - Issue #8688: Distutils now recalculates MANIFEST everytime.
559 - Issue #5099: subprocess.Popen.__del__ no longer references global objects
560 to prevent issues during interpreter shutdown.
562 - Issue #8681: Make the zlib module's error messages more informative when
563 the zlib itself doesn't give any detailed explanation.
565 - Issue #8674: Fixed a number of incorrect or undefined-behaviour-inducing
566 overflow checks in the audioop module.
568 - Issue #8571: Fix an internal error when compressing or decompressing a
569 chunk larger than 1GB with the zlib module's compressor and decompressor
572 - Issue #8573: asyncore _strerror() function might throw ValueError.
574 - Issue #8483: asyncore.dispatcher's __getattr__ method produced confusing
575 error messages when accessing undefined class attributes because of the cheap
576 inheritance with the underlying socket object.
578 - Issue #7472: Fixed typo in email.encoders module; messages using ISO-2022
579 character sets will now consistently use a Content-Transfer-Encoding of
580 7bit rather than sometimes being marked as 8bit.
582 - Issue #4265: shutil.copyfile() was leaking file descriptors when disk fills.
583 Patch by Tres Seaver.
585 - Issue #7755: Use an unencumbered audio file for tests.
587 - Issue #8621: uuid.uuid4() returned the same sequence of values in the
588 parent and any children created using ``os.fork`` on MacOS X 10.6.
590 - Issue #8567: Fix precedence of signals in Decimal module: when a
591 Decimal operation raises multiple signals and more than one of those
592 signals is trapped, the specification determines the order in which
593 the signals should be handled. In many cases this order wasn't
594 being followed, leading to the wrong Python exception being raised.
596 - Issue #7865: The close() method of :mod:`io` objects should not swallow
597 exceptions raised by the implicit flush(). Also ensure that calling
598 close() several times is supported. Patch by Pascal Chambon.
600 - Issue #4687: Fix accuracy of garbage collection runtimes displayed with
603 - Issue #8354: The siginterrupt setting is now preserved for all signals,
606 - Issue #8464: tarfile no longer creates files with execute permissions set
607 when mode="w|" is used.
609 - Issue #7834: Fix connect() of Bluetooth L2CAP sockets with recent versions
610 of the Linux kernel. Patch by Yaniv Aknin.
612 - Issue #6312: Fixed http HEAD request when the transfer encoding is chunked.
613 It should correctly return an empty response now.
615 - Issue #8549: Fix compiling the _ssl extension under AIX. Patch by
618 - Issue #8391: os.execvpe() and os.getenv() supports unicode with surrogates
619 and bytes strings for environment keys and values, and use
620 sys.getfilesystemencoding() instead of sys.getdefautltencoding()
622 - Issue #2302: Fix a race condition in SocketServer.BaseServer.shutdown,
623 where the method could block indefinitely if called just before the
624 event loop started running. This also fixes the occasional freezes
625 witnessed in test_httpservers.
627 - Issue #8524: When creating an SSL socket, the timeout value of the
628 original socket wasn't retained (instead, a socket with a positive timeout
629 would be turned into a non-blocking SSL socket).
631 - Issue #5103: SSL handshake would ignore the socket timeout and block
632 indefinitely if the other end didn't respond.
634 - The do_handshake() method of SSL objects now adjusts the blocking mode of
635 the SSL structure if necessary (as other methods already do).
637 - Issue #8108: Fix the unwrap() method of SSL objects when the socket has
638 a non-infinite timeout. Also make that method friendlier with applications
639 wanting to continue using the socket in clear-text mode, by disabling
640 OpenSSL's internal readahead. Thanks to Darryl Miles for guidance.
642 - Issue #8468: bz2.BZ2File() accepts str with surrogates and bytes filenames
644 - Issue #8496: make mailcap.lookup() always return a list, rather than an
645 iterator. Patch by Gregory Nofi.
647 - Issue #8195: Fix a crash in sqlite Connection.create_collation() if the
648 collation name contains a surrogate character.
650 - Issue #8484: Load all ciphers and digest algorithms when initializing
651 the _ssl extension, such that verification of some SSL certificates
652 doesn't fail because of an "unknown algorithm".
654 - Issue #4814: timeout parameter is now applied also for connections resulting
655 from PORT/EPRT commands.
657 - Issue #3817: ftplib.FTP.abort() method now considers 225 a valid response
658 code as stated in RFC-959 at chapter 5.4.
660 - Issue #8394: _ctypes.dlopen() accepts bytes, bytearray and str with
663 - Issue #7606: XML-RPC traceback stored in X-traceback is now encoded to ASCII
664 using backslashreplace error handler
666 - Issue #5277: Fix quote counting when parsing RFC 2231 encoded parameters.
668 - Issue #8383: pickle and pickletools use surrogatepass error handler when
669 encoding unicode as utf8 to support lone surrogates and stay compatible with
672 - Issue #8179: Fix macpath.realpath() on a non-existing path.
674 - Issue #8139: ossaudiodev didn't initialize its types properly, therefore
675 some methods (such as oss_mixer_device.fileno()) were not available.
676 Initial patch by Bertrand Janin.
678 - Issue #7512: shutil.copystat() could raise an OSError when the filesystem
679 didn't support chflags() (for example ZFS under FreeBSD). The error is
682 - Issue #3890, #8222: Fix recv() and recv_into() on non-blocking SSL sockets.
683 Also, enable the SSL_MODE_AUTO_RETRY flag on SSL sockets, so that blocking
684 reads and writes are always retried by OpenSSL itself.
686 - Issue #6716/2: Backslash-replace error output in compilall.
691 - Issue #6317: Now winsound.PlaySound can accept non ascii filename.
693 - Issue #9054: Fix a crash occurring when using the pyexpat module
694 with expat version 2.0.1.
696 - Issue #10003: Allow handling of SIGBREAK on Windows. Fixes a regression
697 introduced by issue #9324.
699 - Issue #8734: Avoid crash in msvcrt.get_osfhandle() when an invalid file
700 descriptor is provided. Patch by Pascal Chambon.
702 - Issue #7736: Release the GIL around calls to opendir() and closedir()
703 in the posix module. Patch by Marcin Bachry.
705 - Issue #4835: make PyLong_FromSocket_t() and PyLong_AsSocket_t() private
706 to the socket module, and fix the width of socket descriptors to be
707 correctly detected under 64-bit Windows.
709 - Issue #665761: ``functools.reduce()`` will no longer mask exceptions
710 other than ``TypeError`` raised by the iterator argument.
712 - Issue #9570: Use PEP 383 decoding in os.mknod and os.mkfifo.
714 - Issue #9324: Add parameter validation to signal.signal on Windows in order
717 - Issue #9526: Remove some outdated (int) casts that were preventing
718 the array module from working correctly with arrays of more than
721 - Fix memory leak in ssl._ssl._test_decode_cert.
723 - Issue #8065: Fix memory leak in readline module (from failure to
724 free the result of history_get_history_state()).
726 - Issue #9450: Fix memory leak in readline.replace_history_item and
727 readline.remove_history_item for readline version >= 5.0.
729 - Issue #8105: Validate file descriptor passed to mmap.mmap on Windows.
731 - Issue #9422: Fix memory leak when re-initializing a struct.Struct object.
733 - Issue #7900: The getgroups(2) system call on MacOSX behaves rather oddly
734 compared to other unix systems. In particular, os.getgroups() does
735 not reflect any changes made using os.setgroups() but basicly always
736 returns the same information as the id command.
738 os.getgroups() can now return more than 16 groups on MacOSX.
740 - Issue #7384: If the system readline library is linked against
741 ncurses, do not link the readline module against ncursesw. The
742 additional restriction of linking the readline and curses modules
743 against the same curses library is currently not enabled.
745 - Issue #8973: Add __all__ to struct module; this ensures that
746 help(struct) includes documentation for the struct.Struct class.
748 - Issue #2810: Fix cases where the Windows registry API returns
749 ERROR_MORE_DATA, requiring a re-try in order to get the complete result.
754 - Issue #8852: Allow the socket module to build on OpenSolaris.
756 - Issue #10054: Some platforms provide uintptr_t in inttypes.h. Patch by
759 - Issue #10055: Make json C89-compliant in UCS4 mode.
761 - Issue #6244: Allow detect_tkinter to look for Tcl/Tk 8.6.
763 - Issue #1633863: Don't ignore $CC under AIX.
765 - Issue #9810: Compile bzip2 source files in python's project file
766 directly. It used to be built with bzip2's makefile.
768 - Issue #941346: Improve the build process under AIX and allow Python to
769 be built as a shared library. Patch by Sébastien Sablé.
771 - Issue #4026: Make the fcntl extension build under AIX. Patch by Sébastien
774 - Issue #3101: Helper functions _add_one_to_index_C() and
775 _add_one_to_index_F() become _Py_add_one_to_index_C() and
776 _Py_add_one_to_index_F(), respectively.
778 - Issue #9700: define HAVE_BROKEN_POSIX_SEMAPHORES under AIX 6.x. Patch by
781 - Issue #3928: os.mknod() now available in Solaris, also.
783 - Issue #6716: Quote -x arguments of compileall in MSI installer.
784 Exclude 2to3 tests from compileall.
786 - Issue #1628484: The Makefile doesn't ignore the CFLAGS environment
787 variable anymore. It also forwards the LDFLAGS settings to the linker
788 when building a shared library.
790 - Issue #9701: The MacOSX installer can patch the shell profile to ensure that
791 the "bin" directory inside the framework is on the shell's search path. This
792 feature now also supports the ZSH shell.
794 - Issue #7473: avoid link errors when building a framework with a different
795 set of architectures than the one that is currently installed.
800 - Issue #3699: Fix test_bigaddrspace and extend it to test bytestrings
801 as well as unicode strings. Initial patch by Sandro Tosi.
803 - Issue #9628: fix runtests.sh -x option so more than one test can be excluded.
805 - Issue #9894: Do not hardcode ENOENT in test_subprocess.
807 - Issue #9315: Added tests for the trace module. Patch by Eli Bendersky.
809 - Issue #7564: Skip test_ioctl if another process is attached to /dev/tty.
811 - Issue #8857: Provide a test case for socket.getaddrinfo.
813 - Issue #8433: Fix test_curses failure with newer versions of ncurses.
815 - Issue #9496: Provide a test suite for the rlcompleter module. Patch by
818 - Issue #9251: test_threaded_import didn't fail when run through regrtest
819 if the import lock was disabled.
821 - Issue #7449: Skip test_socketserver if threading support is disabled
823 - Issue #8672: Add a zlib test ensuring that an incomplete stream can be
824 handled by a decompressor object without errors (it returns incomplete
827 - Issue #8629: Disable some test_ssl tests, since they give different
828 results with OpenSSL 1.0.0 and higher.
830 - Issue #8533: regrtest uses backslashreplace error handler for stdout to avoid
831 UnicodeEncodeError (write non-ASCII character to stdout using ASCII encoding)
833 - Issue #8576: Remove use of find_unused_port() in test_smtplib and
834 test_multiprocessing. Patch by Paul Moore.
836 - Issue #8531: Skip test_ascii_formatd if ctypes module is missing
838 - Issue #3864: Skip three test_signal tests on freebsd6 because they fail
839 if any thread was previously started, most likely due to a platform bug.
841 - Issue #8193: Fix test_zlib failure with zlib 1.2.4.
843 - Issue #9568: Fix test_urllib2_localnet on OS X 10.3.
848 - Issue #9817: Add expat COPYING file; add expat, libffi and expat licenses
851 - Issue #9255: Document that the 'test' package is meant for interal Python use
854 - Issue #7829: Document in dis that bytecode is an implementation detail.
859 - Issue #7287: Demo/imputil/knee.py was removed.
863 What's New in Python 3.1.2?
864 ===========================
866 *Release date: 2010-03-20*
871 - Issue #7173: Generator finalization could invalidate sys.exc_info().
876 - Issue #2698: The --compiler ignored was ignored for distutils' build_ext.
878 - Issue #4961: Inconsistent/wrong result of askyesno function in tkMessageBox
881 - Issue #7356: ctypes.util: Make parsing of ldconfig output independent of
885 What's New in Python 3.1.2 release candidate 1?
886 ===============================================
888 *Release date: 2010-03-06*
893 - Issue #7544: Preallocate thread memory before creating the thread to avoid
894 a fatal error in low memory condition.
896 - Issue #7820: The parser tokenizer restores all bytes in the right if
899 - Handle errors from looking up __prepare__ correctly.
901 - Issue #5939: Add additional runtime checking to ensure a valid capsule
902 in Modules/_ctypes/callproc.c.
904 - Issue #7309: Fix unchecked attribute access when converting
905 UnicodeEncodeError, UnicodeDecodeError, and UnicodeTranslateError to
908 - Issue #6902: Fix problem with built-in types format incorrectly with
911 - Issue #7988: Fix default alignment to be right aligned for
912 complex.__format__. Now it matches other numeric types.
914 - Issue #7385: Fix a crash in `MemoryView_FromObject` when
915 `PyObject_GetBuffer` fails. Patch by Florent Xicluna.
917 - Issue #7788: Fix an interpreter crash produced by deleting a list
918 slice with very large step value.
920 - Issue #7561: Operations on empty bytearrays (such as `int(bytearray())`)
921 could crash in many places because of the PyByteArray_AS_STRING() macro
922 returning NULL. The macro now returns a statically allocated empty
925 - Issue #7632: Fix various str -> float conversion bugs present in 2.7
926 alpha 2, including: (1) a serious 'wrong output' bug that could
927 occur for long (> 40 digit) input strings, (2) a crash in dtoa.c
928 that occurred in debug builds when parsing certain long numeric
929 strings corresponding to subnormal values, (3) a memory leak for
930 some values large enough to cause overflow, and (4) a number of
931 flaws that could lead to incorrectly rounded results.
933 - Issue #7604: Deleting an unset slotted attribute did not raise an
936 - Issue #7466: segmentation fault when the garbage collector is called
937 in the middle of populating a tuple. Patch by Florent Xicluna.
939 - Issue #7419: setlocale() could crash the interpreter on Windows when called
942 - Issue #6077: On Windows, files opened with tempfile.TemporaryFile in "wt+"
943 mode would appear truncated on the first '0x1a' byte (aka. Ctrl+Z).
945 - Issue #7085: Fix crash when importing some extensions in a thread
948 - Issue #7298: fixes for range and reversed(range(...)). Iteration
949 over range(a, b, c) incorrectly gave an empty iterator when a, b and
950 c fit in C long but the length of the range did not. Also fix
951 several cases where reversed(range(a, b, c)) gave wrong results, and
952 fix a refleak for reversed(range(a, b, c)) with large arguments.
954 - Issue #7244: itertools.izip_longest() no longer ignores exceptions
955 raised during the formation of an output tuple.
957 - Issue #3297: On wide unicode builds, do not split unicode characters into
960 - Issue #1722344: threading._shutdown() is now called in Py_Finalize(), which
961 fixes the problem of some exceptions being thrown at shutdown when the
962 interpreter is killed. Patch by Adam Olsen.
964 - Issue #7065: Fix a crash in bytes.maketrans and bytearray.maketrans when
965 using byte values greater than 127. Patch by Derk Drukker.
967 - Issue #7019: Raise ValueError when unmarshalling bad long data, instead
968 of producing internally inconsistent Python longs.
970 - Issue #6990: Fix threading.local subclasses leaving old state around
971 after a reference cycle GC which could be recycled by new locals.
973 - Issue #6846: Fix bug where bytearray.pop() returns negative integers.
975 - Issue #6750: A text file opened with io.open() could duplicate its output
976 when writing from multiple threads at the same time.
981 - Issue #7154: urllib.request can now detect the proxy settings on OSX 10.6
982 (as long as the user didn't specify 'automatic proxy configuration').
984 - Issue #8412: os.system() now accepts bytes, bytearray and str with
987 - Issue #4282: Fix the main function of the profile module for a non-ASCII
988 script, open the file in binary mode and not in text mode with the default
991 - Issue #7774: Set sys.executable to an empty string if argv[0] has been set to
992 an non existent program name and Python is unable to retrieve the real
995 - Issue #6509: fix re.sub to work properly when the pattern, the string, and
996 the replacement were all bytes. Patch by Antoine Pitrou.
998 - Issue #1054943: Fix unicodedata.normalize('NFC', text) for the Public Review
1001 - Issue #7494: fix a crash in _lsprof (cProfile) after clearing the profiler,
1002 reset also the pointer to the current pointer context.
1004 - Issue #7250: Fix info leak of os.environ across multi-run uses of
1005 wsgiref.handlers.CGIHandler.
1007 - Issue #1729305: Fix doctest to handle encode error with "backslashreplace".
1009 - Issue #691291: codecs.open() should not convert end of lines on reading and
1012 - Issue #7959: ctypes callback functions are now registered correctly
1013 with the cycle garbage collector.
1015 - Issue #6666: fix bug in trace.py that applied the list of directories
1016 to be ignored only to the first file. Noted by Bogdan Opanchuk.
1018 - Issue #7597: curses.use_env() can now be called before initscr().
1019 Noted by Kan-Ru Chen.
1021 - Issue #7310: fix the __repr__ of os.environ to show the environment variables.
1023 - Issue #7970: email.Generator.flatten now correctly flattens message/rfc822
1024 messages parsed by email.Parser.HeaderParser.
1026 - Issue #7361: Importlib was not handling bytecode files less than 8 bytes in
1029 - Issue #7835: shelve should no longer produce mysterious warnings during
1030 interpreter shutdown.
1032 - Issue #6233: ElementTree failed converting unicode characters to XML
1033 entities when they could't be represented in the requested output
1034 encoding. Patch by Jerry Chen.
1036 - Issue #4772: Raise a ValueError when an unknown Bluetooth protocol is
1037 specified, rather than fall through to AF_PACKET (in the `socket` module).
1038 Also, raise ValueError rather than TypeError when an unknown TIPC address
1039 type is specified. Patch by Brian Curtin.
1041 - Issue #6939: Fix file I/O objects in the `io` module to keep the original
1042 file position when calling `truncate()`. It would previously change the
1043 file position to the given argument, which goes against the tradition of
1044 ftruncate() and other truncation APIs. Patch by Pascal Chambon.
1046 - Issue #7792: Registering non-classes to ABCs raised an obscure error.
1048 - Issue #7785: Don't accept bytes in FileIO.write().
1050 - Issue #7773: Fix an UnboundLocalError in platform.linux_distribution() when
1051 the release file is empty.
1053 - Issue #7561: Fix crashes when using bytearray objects with the posix
1056 - Issue #1670765: Prevent email.generator.Generator from re-wrapping
1057 headers in multipart/signed MIME parts, which fixes one of the sources of
1058 invalid modifications to such parts by Generator.
1060 - Issue #7701: Fix crash in binascii.b2a_uu() in debug mode when given a
1061 1-byte argument. Patch by Victor Stinner.
1063 - Issue #3299: Fix possible crash in the _sre module when given bad
1064 argument values in debug mode. Patch by Victor Stinner.
1066 - Issue #7681: Use floor division in appropiate places in the wave module.
1068 - Issue #5372: Drop the reuse of .o files in Distutils' ccompiler (since
1069 Extension extra options may change the output without changing the .c
1070 file). Initial patch by Collin Winter.
1072 - Issue #7617: Make sure distutils.unixccompiler.UnixCCompiler recognizes
1073 gcc when it has a fully qualified configuration prefix. Initial patch
1076 - Issue #7105: Make WeakKeyDictionary and WeakValueDictionary robust against
1077 the destruction of weakref'ed objects while iterating.
1079 - Issue #7455: Fix possible crash in cPickle on invalid input. Patch by
1082 - Issue #6511: ZipFile now raises BadZipfile (instead of an IOError) when
1083 opening an empty or very small file.
1085 - Issue #7556: Make sure Distutils' msvc9compile reads and writes the
1086 MSVC XML Manifest file in text mode so string patterns can be used
1087 in regular expressions.
1089 - Issue #7552: Removed line feed in the base64 Authorization header in
1090 the Distutils upload command to avoid an error when PyPI reads it.
1091 This occurs on long passwords. Initial patch by JP St. Pierre.
1093 - Issue #7231: urllib2 cannot handle https with proxy requiring auth. Patch by
1094 Tatsuhiro Tsujikawa.
1096 - Issue #4757: `zlib.compress` and other methods in the zlib module now
1097 raise a TypeError when given an `str` object (rather than a `bytes`-like
1098 object). Patch by Victor Stinner and Florent Xicluna.
1100 - Issue #7349: Make methods of file objects in the io module accept None as an
1101 argument where file-like objects (ie StringIO and BytesIO) accept them to mean
1102 the same as passing no argument.
1104 - Issue #5949: added check for correct lineends in input from IMAP server
1107 - Fix variations of extending deques: d.extend(d) d.extendleft(d) d+=d
1109 - Issue #6986: Fix crash in the JSON C accelerator when called with the
1110 wrong parameter types. Patch by Victor Stinner.
1112 - Issue #1923: Fixed the removal of meaningful spaces when PKG-INFO is
1113 generated in Distutils. Patch by Stephen Emslie.
1115 - Issue #4120: Drop reference to CRT from manifest when building extensions with
1118 - Issue #7410: deepcopy of itertools.count was resetting the count.
1120 - Issue #4486: When an exception has an explicit cause, do not print its
1121 implicit context too. This affects the `traceback` module as well as
1122 built-in exception printing.
1124 - Issue #1488943: difflib.Differ() doesn't always add hints for tab characters
1126 - Issue #7354: distutils.tests.test_msvc9compiler - dragfullwindows can
1129 - Issue #3976: pprint for sets, frozensets, and dicts now succeed when
1130 they contain unorderable types.
1132 - Issue #5037: Proxy the __bytes__ special method instead to __bytes__ instead
1135 - Issue #7341: Close the internal file object in the TarFile constructor in
1138 - Issue #7293: distutils.test_msvc9compiler is fixed to work on any fresh
1139 Windows box. Help provided by David Bolen.
1141 - Issue #7328: pydoc no longer corrupts sys.path when run with the '-m' switch
1143 - Issue #7318: multiprocessing now uses a timeout when it fails to establish
1144 a connection with another process, rather than looping endlessly. The
1145 default timeout is 20 seconds, which should be amply sufficient for
1148 - Issue #7282: Fix a memory leak when an RLock was used in a thread other
1149 than those started through `threading.Thread` (for example, using
1150 `_thread.start_new_thread()`).
1152 - Issue #7187: Importlib would not silence the IOError raised when trying to
1153 write new bytecode when it was made read-only.
1155 - Issue #7264: Fix a possible deadlock when deallocating thread-local objects
1156 which are part of a reference cycle.
1158 - Issue #6896: mailbox.Maildir now invalidates its internal cache each time
1159 a modification is done through it. This fixes inconsistencies and test
1160 failures on systems with slightly bogus mtime behaviour.
1162 - Issue #6665: Fix fnmatch to properly match filenames with newlines in them.
1164 - Issue #7246 & Issue #7208: getpass now properly flushes input before
1165 reading from stdin so that existing input does not confuse it and
1166 lead to incorrect entry or an IOError. It also properly flushes it
1167 afterwards to avoid the terminal echoing the input afterwards on
1168 OSes such as Solaris.
1170 - Issue #7233: Fix a number of two-argument Decimal methods to make
1171 sure that they accept an int or long as the second argument. Also
1172 fix buggy handling of large arguments (those with coefficient longer
1173 than the current precision) in shift and rotate.
1175 - Issue #7205: Fix a possible deadlock when using a BZ2File object from
1176 several threads at once.
1178 - Issue #7071: byte-compilation in Distutils is now done with respect to
1179 sys.dont_write_bytecode.
1181 - Issue #7099: Decimal.is_normal now returns True for numbers with exponent
1184 - Issue #7080: locale.strxfrm() raises a MemoryError on 64-bit non-Windows
1185 platforms, and assorted locale fixes by Derk Drukker.
1187 - Issue #5833: Fix extra space character in readline completion with the
1188 GNU readline library version 6.0.
1190 - Issue #6894: Fixed the issue urllib2 doesn't respect "no_proxy" environment
1192 - Issue #7082: When falling back to the MIME 'name' parameter, the
1193 correct place to look for it is the Content-Type header.
1195 - Make tokenize.detect_coding() normalize utf-8 and iso-8859-1 variants like the
1198 - Issue #7048: Force Decimal.logb to round its result when that result
1199 is too large to fit in the current precision.
1201 - Issue #6236, #6348: Fix various failures in the I/O library under AIX
1202 and other platforms, when using a non-gcc compiler. Patch by Derk Drukker.
1204 - Issue #6954: Fixed crash when using DISTUTILS_DEBUG flag in Distutils.
1206 - Issue #4606: Passing 'None' if ctypes argtype is set to POINTER(...)
1207 does now always result in NULL.
1209 - Issue #5042: Structure sub-subclass does now initialize correctly
1210 with base class positional arguments.
1212 - Issue #6882: Import uuid creates zombies processes.
1214 - Issue #6635: Fix profiler printing usage message.
1216 - Issue #6888: pdb's alias command was broken when no arguments were given.
1218 - Issue #6795: int(Decimal('nan')) now raises ValueError instead of
1219 returning NaN or raising InvalidContext. Also, fix infinite recursion
1220 in long(Decimal('nan')).
1222 - Issue #6850: Fix bug in Decimal._parse_format_specifier for formats
1223 with no type specifier.
1225 - Issue #6239: ctypes.c_char_p return value must return bytes.
1227 - Issue #6838: Use a list to accumulate the value instead of
1228 repeatedly concatenating strings in http.client's
1229 HTTPResponse._read_chunked providing a significant speed increase
1230 when downloading large files servend with a Transfer-Encoding of 'chunked'.
1232 - Have importlib raise ImportError if None is found in sys.modules for a
1235 - Issue #6794: Fix Decimal.compare_total and Decimal.compare_total_mag: NaN
1236 payloads are now ordered by integer value rather than lexicographically.
1238 - Issue #6163: Fixed HP-UX runtime library dir options in
1239 distutils.unixcompiler. Initial patch by Sridhar Ratnakumar and
1240 Michael Haubenwallner.
1242 - Issue #7066: archive_util.make_archive now restores the cwd if an error is
1243 raised. Initial patch by Ezio Melotti.
1245 - Issue #7481: When a threading.Thread failed to start it would leave the
1246 instance stuck in initial state and present in threading.enumerate().
1248 - Issue #1068268: The subprocess module now handles EINTR in internal
1249 os.waitpid and os.read system calls where appropriate.
1251 - Issue #9315: Fix for the trace module to record correct class name
1252 for tracing methods.
1257 - Issue #9277: Fix bug in struct.pack for bools in standard mode
1258 (e.g., struct.pack('>?')): if conversion to bool raised an exception
1259 then that exception wasn't properly propagated on machines where
1262 - Issue #5180: Fixed a bug that prevented loading 2.x pickles in 3.x
1263 python when they contain instances of old-style classes.
1265 - Issue #7670: sqlite3: Fixed crashes when operating on closed connections.
1267 - Stop providing crtassem.h symbols when compiling with Visual Studio 2010, as
1268 msvcr100.dll is not a platform assembly anymore.
1270 - Issue #7078: Set struct.__doc__ from _struct.__doc__.
1272 - Issue #6848: Fix curses module build failure on OS X 10.6.
1274 - Expat: Fix DoS via XML document with malformed UTF-8 sequences
1277 - Issue #7999: os.setreuid() and os.setregid() would refuse to accept a -1
1278 parameter on some platforms such as OS X.
1283 - Issue #7924: Fix an intermittent 'XXX undetected error' failure in
1284 test_capi (only seen so far on platforms where the curses module
1285 wasn't built), due to an uncleared exception.
1287 - issue #7728: test_timeout was changed to use test.support.bind_port
1288 instead of a hard coded port.
1290 - Issue #7376: instead of running a self-test (which was failing) when called
1291 with no arguments, doctest.py now gives a usage message.
1293 - Issue #7498: test_multiprocessing now uses test.support.find_unused_port
1294 instead of a hardcoded port number in test_rapid_restart.
1296 - Issue #7431: use TESTFN in test_linecache instead of trying to create a
1297 file in the Lib/test directory, which might be read-only for the
1298 user running the tests.
1300 - Issue #7324: add a sanity check to regrtest argument parsing to
1301 catch the case of an option with no handler.
1303 - Issue #6551: test_zipimport could import and then destroy some modules of
1304 the encodings package, which would make other tests fail further down
1305 the road because the internally cached encoders and decoders would point
1306 to empty global variables.
1308 - Issue #7295: Do not use a hardcoded file name in test_tarfile.
1310 - Issue #7270: Add some dedicated unit tests for multi-thread synchronization
1311 primitives such as Lock, RLock, Condition, Event and Semaphore.
1313 - Issue #7248 (part 2): Use a unique temporary directory for importlib source
1314 tests instead of tempfile.tempdir. This prevents the tests from sharing state
1315 between concurrent executions on the same system.
1317 - Issue #7248: In importlib.test.source.util a try/finally block did not make
1318 sure that some referenced objects actually were created in the block before
1319 calling methods on the object.
1321 - Issue #7055: test___all__ now greedily detects all modules which have an
1322 __all__ attribute, rather than using a hardcoded and incomplete list.
1324 - Issue #7058: Added save/restore for argv and os.environ to runtest_inner
1325 in regrtest, with warnings if the called test modifies them.
1327 - Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.
1332 - Make PyUnicode_CompareWithASCIIString return not equal if the Python string
1333 has '\0' at the end.
1335 - Issue #7414: 'C' code wasn't being skipped properly (for keyword arguments)
1336 in PyArg_ParseTupleAndKeywords.
1341 - Issue #9280: Make sharedinstall depend on sharedmods.
1343 - Issue #8854: Fix finding Visual Studio 2008 on Windows x64.
1345 - Issue #3920, #7903: Define _BSD_SOURCE on OpenBSD 4.4 through 4.9.
1347 - Issue #7632: When Py_USING_MEMORY_DEBUGGER is defined, disable the
1348 private memory allocation scheme in dtoa.c and use PyMem_Malloc and
1349 PyMem_Free instead. Also disable caching of powers of 5.
1351 - Switch to OpenSSL 0.9.8l on Windows.
1353 - Issue #6603: Change READ_TIMESTAMP macro in ceval.c so that it
1354 compiles correctly under gcc on x86-64. This fixes a reported
1355 problem with the --with-tsc build on x86-64.
1357 - Issue #6802: Fix build issues on MacOSX 10.6
1359 - Issue #6801 : symmetric_difference_update also accepts |.
1360 Thanks to Carl Chenet.
1362 - Issue #7541: when using ``python-config`` with a framework install the
1363 compiler might use the wrong library.
1365 - Issue #6491: Allow --with-dbmliborder to specify that no dbms will be built.
1367 - Issue #7589: Only build the nis module when the correct header files are
1373 - Updating `Using Python` documentation to include description of CPython's
1376 - Issue #6556: Fixed the Distutils configuration files location explanation
1379 - Update python manual page (options -B, -O0, -s, environment variables
1380 PYTHONDONTWRITEBYTECODE, PYTHONNOUSERSITE).
1382 - Issue #8909: Added the size of the bitmap used in the installer created by
1383 distutils' bdist_wininst. Patch by Anatoly Techtonik.
1386 What's New in Python 3.1.1?
1387 ===========================
1389 *Release date: 2009-08-13*
1394 - Issue #6707: dir() on an uninitialized module caused a crash.
1396 - Issue #6540: Fixed crash for bytearray.translate() with invalid parameters.
1398 - Issue #6573: set.union() stopped processing inputs if an instance of self
1399 occurred in the argument chain.
1401 - Issue #6070: On posix platforms import no longer copies the execute bit
1402 from the .py file to the .pyc file if it is set.
1404 - Issue #6428: Since Python 3.0, the __bool__ method must return a bool
1405 object, and not an int. Fix the corresponding error message, and the
1408 - Issue #6347: Include inttypes.h as well as stdint.h in pyport.h.
1409 This fixes a build failure on HP-UX: int32_t and uint32_t are
1410 defined in inttypes.h instead of stdint.h on that platform.
1412 - Issue #6373: Fixed a SystemError when encoding with the latin-1 codec and
1413 the 'surrogateescape' error handler, a string which contains unpaired
1419 - Issue #6624: yArg_ParseTuple with "s" format when parsing argument with
1420 NUL: Bogus TypeError detail string.
1422 - Issue #6405: Remove duplicate type declarations in descrobject.h.
1424 - The code flags for old __future__ features are now available again.
1429 - Issue #6106: telnetlib.Telnet.process_rawq doesn't handle default WILL/WONT
1432 - Issue #6126: Fixed pdb command-line usage.
1434 - Issue #6629: Fix a data corruption issue in the new I/O library, which could
1435 occur when writing to a BufferedRandom object (e.g. a file opened in "rb+" or
1436 "wb+" mode) after having buffered a certain amount of data for reading. This
1437 bug was not present in the pure Python implementation.
1439 - Issue #6622: Fix "local variable 'secret' referenced before
1440 assignment" bug in POP3.apop.
1442 - Issue #6637: defaultdict.copy() did not work when the default factory
1443 was left unspecified. Also, the eval/repr round-trip would fail when
1444 the default_factory was None.
1446 - Issue #2715: Remove remnants of Carbon.File from binhex module.
1448 - Issue #6595: The Decimal constructor now allows arbitrary Unicode
1449 decimal digits in input, as recommended by the standard. Previously
1450 it was restricted to accepting [0-9].
1452 - Issues #5155, #5313, #5331: multiprocessing.Process._bootstrap was
1453 unconditionally calling "os.close(sys.stdin.fileno())" resulting in file
1456 - Issue #1424152: Fix for http.client, urllib.request to support SSL while
1457 working through proxy. Original patch by Christopher Li, changes made by
1460 - importlib.abc.PyLoader did not inherit from importlib.abc.ResourceLoader like
1461 the documentation said it did even though the code in PyLoader relied on the
1462 abstract method required by ResourceLoader.
1464 - Issue #6431: Make Fraction type return NotImplemented when it doesn't
1465 know how to handle a comparison without loss of precision. Also add
1466 correct handling of infinities and nans for comparisons with float.
1468 - Issue #6415: Fixed warnings.warn segfault on bad formatted string.
1470 - Issue #6358: The exit status of a command started with os.popen() was
1471 reported differently than it did with python 2.x.
1473 - Issue #6323: The pdb debugger did not exit when running a script with a
1476 - Issue #3392: The subprocess communicate() method no longer fails in select()
1477 when file descriptors are large; communicate() now uses poll() when possible.
1479 - Issue #6369: Fix an RLE decompression bug in the binhex module.
1481 - Issue #6344: Fixed a crash of mmap.read() when passed a negative argument.
1483 - Issue #4005: Fixed a crash of pydoc when there was a zip file present in
1489 - Fix a segfault in expat.
1491 - Issue #4509: array.array objects are no longer modified after an operation
1492 failing due to the resize restriction in-place when the object has exported
1498 - Issue #4601: 'make install' did not set the appropriate permissions on
1501 - Issue #5390: Add uninstall icon independent of whether file
1502 extensions are installed.
1507 - Fix a test in importlib.test.source.test_abc_loader that was incorrectly
1508 testing when a .pyc file lacked an code object bytecode.
1511 What's New in Python 3.1?
1512 =========================
1514 *Release date: 27-June-2009*
1519 - Issue #6334: Fix bug in range length calculation for ranges with
1522 - Issue #6329: Fixed iteration for memoryview objects (it was being blocked
1523 because it wasn't recognized as a sequence).
1528 - Issue #6314: logging.basicConfig() performs extra checks on the "level"
1531 - Issue #6274: Fixed possible file descriptors leak in subprocess.py
1533 - Accessing io.StringIO.buffer now raises an AttributeError instead of
1534 io.UnsupportedOperation.
1536 - Issue #6271: mmap tried to close invalid file handle (-1) when anonymous.
1539 - Issue #1202: zipfile module would cause a struct.error when attempting to
1540 store files with a CRC32 > 2**31-1.
1545 - Issue #5590: Remove unused global variable in pyexpat extension.
1548 What's New in Python 3.1 Release Candidate 2?
1549 =============================================
1551 *Release date: 13-June-2009*
1556 - Fixed SystemError triggered by "range([], 1, -1)".
1558 - Issue #5924: On Windows, a large PYTHONPATH environment variable
1559 (more than 255 characters) would be completely ignored.
1561 - Issue #4547: When debugging a very large function, it was not always
1562 possible to update the lineno attribute of the current frame.
1564 - Issue #5330: C functions called with keyword arguments were not reported by
1565 the various profiling modules (profile, cProfile). Patch by Hagen Fürstenau.
1570 - Issue #6438: Fixed distutils.cygwinccompiler.get_versions : the regular
1571 expression string pattern was trying to match against a bytes returned by
1572 Popen. Tested under win32 to build the py-postgresql project.
1574 - Issue #6258: Support AMD64 in bdist_msi.
1576 - Issue #6195: fixed doctest to no longer try to read 'source' data from
1579 - Issue #5262: Fixed bug in next rollover time computation in
1580 TimedRotatingFileHandler.
1582 - Issue #6217: The C implementation of io.TextIOWrapper didn't include the
1583 errors property. Additionally, the errors and encoding properties of StringIO
1584 are always None now.
1586 - Issue #6137: The pickle module now translates module names when loading
1587 or dumping pickles with a 2.x-compatible protocol, in order to make data
1588 sharing and migration easier. This behaviour can be disabled using the
1589 new `fix_imports` optional argument.
1591 - Removed the ipaddr module.
1593 - Issue #3613: base64.{encode,decode}string are now called
1594 base64.{encode,decode}bytes which reflects what type they accept and return.
1595 The old names are still there as deprecated aliases.
1597 - Issue #5767: Remove sgmlop support from xmlrpc.client.
1599 - Issue #6150: Fix test_unicode on wide-unicode builds.
1601 - Issue #6149: Fix initialization of WeakValueDictionary objects from non-empty
1607 - Issue #6221: Delete test registry key before running the test.
1609 - Issue #6158: Package Sine-1000Hz-300ms.aif in MSI file.
1614 - Issue #5735: Python compiled with --with-pydebug should throw an
1615 ImportError when trying to import modules compiled without
1616 --with-pydebug, and vice-versa.
1622 - Issue #6154: Make sure the intl library is added to LIBS if needed. Also
1623 added LIBS to OS X framework builds.
1625 - Issue #5809: Specifying both --enable-framework and --enable-shared is
1626 an error. Configure now explicity tells you about this.
1630 What's New in Python 3.1 release candidate 1?
1631 =============================================
1633 *Release date: 2009-05-30*
1638 - Issue #6097: Escape UTF-8 surrogates resulting from mbstocs conversion
1639 of the command line.
1641 - Issue #6012: Add cleanup support to O& argument parsing.
1643 - Issue #6089: Fixed str.format with certain invalid field specifiers
1644 that would raise SystemError.
1646 - Issue #5982: staticmethod and classmethod now expose the wrapped
1647 function with __func__.
1649 - Added support for multiple context managers in the same with-statement.
1650 Deprecated contextlib.nested() which is no longer needed.
1652 - Issue #5829: complex("1e500") no longer raises OverflowError. This
1653 makes it consistent with float("1e500") and interpretation of real
1654 and imaginary literals.
1656 - Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.
1658 - Issue #5994: the marshal module now has docstrings.
1660 - Issue #5981: Fix three minor inf/nan issues in float.fromhex:
1661 (1) inf and nan strings with trailing whitespace were incorrectly
1662 rejected; (2) parsing of strings representing infinities and nans
1663 was locale aware; and (3) the interpretation of fromhex('-nan')
1664 didn't match that of float('-nan').
1669 - Issue #4859: Implement PEP 383 for pwd, spwd, and grp.
1671 - smtplib 'login' and 'cram-md5' login are also fixed (see Issue #5259).
1673 - Issue #6121: pydoc now ignores leading and trailing spaces in the
1674 argument to the 'help' function.
1676 - Issue #6118: urllib.parse.quote_plus ignored the encoding and errors
1677 arguments for strings with a space in them.
1679 - collections.namedtuple() was not working with the following field
1680 names: cls, self, tuple, itemgetter, and property.
1682 - In unittest, using a skipping decorator on a class is now equivalent to
1683 skipping every test on the class. The ClassTestSuite class has been removed.
1685 - Issue #6050: Don't fail extracting a directory from a zipfile if
1686 the directory already exists.
1688 - Issue #1309352: fcntl now converts its third arguments to a C `long` rather
1689 than an int, which makes some operations possible under 64-bit Linux (e.g.
1690 DN_MULTISHOT with F_NOTIFY).
1692 - Issue #5761: Add the name of the underlying file to the repr() of various
1695 - Issue #5259: smtplib plain auth login no longer gives a traceback. Fix
1696 by Musashi Tamura, tests by Marcin Bachry.
1698 - Issue #1983: Fix functions taking or returning a process identifier to use
1699 the dedicated C type ``pid_t`` instead of a C ``int``. Some platforms have
1700 a process identifier type wider than the standard C integer type.
1702 - Issue #4066: smtplib.SMTP_SSL._get_socket now correctly returns the socket.
1703 Patch by Farhan Ahmad, test by Marcin Bachry.
1705 - Issue #2116: Weak references and weak dictionaries now support copy()ing and
1708 - Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.
1710 - Issue #5918: Fix a crash in the parser module.
1712 - Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.
1714 - Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
1715 library. This means, for example, that opening an UTF-16 text file in
1716 append mode doesn't add a BOM at the end of the file if the file isn't
1719 - Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
1720 file is a binary. Patch by Brodie Rao, tests by Daniel Diniz. This fix
1721 corrects a pydoc regression.
1723 - Issue #5955: aifc's close method did not close the file it wrapped,
1724 now it does. This also means getfp method now returns the real fp.
1729 - Issue #6047: fullinstall has been removed because Python 3's executable will
1730 now be known as python3.
1732 - Lib/smtpd.py is no longer installed as a script.
1737 - Issue #3061: Use wcsftime for time.strftime where available.
1739 - Issue #4873: Fix resource leaks in error cases of pwd and grp.
1741 - Issue #6093: Fix off-by-one error in locale.strxfrm.
1743 - The _functools and _locale modules are now built into the libpython shared
1744 library instead of as extension modules.
1749 - Issue #3585: Add pkg-config support. It creates a python-2.7.pc file
1750 and a python3.pc symlink in the $(LIBDIR)/pkgconfig directory. Patch by
1756 - Issue #5442: Tests for importlib were not properly skipping case-sensitivity
1757 tests on darwin even when the OS was installed on a case-sensitive
1758 filesystem. Also fixed tests that should not be run when
1759 sys.dont_write_bytecode is true.
1762 What's New in Python 3.1 beta 1?
1763 ================================
1765 *Release date: 2009-05-06*
1770 - Issue #5914: Add new C API function PyOS_string_to_double, and
1771 deprecate PyOS_ascii_strtod and PyOS_ascii_atof.
1773 - Issue #3382: float.__format__, complex.__format__, and %-formatting
1774 no longer map 'F' to 'f'. Because of issue #5859 (below), this only
1775 affects nan -> NAN and inf -> INF.
1777 - Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
1778 in all operations, including splitdrive, split, etc. splitunc() now issues
1779 a PendingDeprecation warning.
1781 - Issue #5920: For float.__format__, change the behavior with the
1782 empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
1783 to be like 'g' but with at least one decimal point and with a
1784 default precision of 12. Previously, the behavior the same but with
1785 a default precision of 6. This more closely matches str(), and
1786 reduces surprises when adding alignment flags to the empty
1787 presentation type. This also affects the new complex.__format__ in
1790 - Implement PEP 383, Non-decodable Bytes in System Character Interfaces.
1792 - Issue #5890: in subclasses of 'property' the __doc__ attribute was
1793 shadowed by classtype's, even if it was None. property now
1794 inserts the __doc__ into the subclass instance __dict__.
1796 - Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
1797 sequences. Patch by Nick Barnes and Victor Stinner.
1799 - Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
1801 - Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
1802 received a new method, detach(). detach() disconnects the underlying stream
1803 from the buffer or text IO and returns it.
1805 - Issue #5859: Remove switch from '%f' to '%g'-style formatting for
1806 floats with absolute value over 1e50. Also remove length
1807 restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
1808 12.34 no longer raise an exception.
1810 - Issue #1588: Add complex.__format__. For example,
1811 format(complex(1, 2./3), '.5') now produces a sensible result.
1813 - Issue #5864: Fix empty format code formatting for floats so that it
1814 never gives more than the requested number of significant digits.
1816 - Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
1817 new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.
1819 - Issue #5835: Deprecate PyOS_ascii_formatd.
1821 - Issue #4971: Fix titlecase for characters that are their own
1822 titlecase, but not their own uppercase.
1824 - Issue #5283: Setting __class__ in __del__ caused a segfault.
1826 - Issue #5816: complex(repr(z)) now recovers z exactly, even when
1827 z involves nans, infs or negative zeros.
1829 - Issue #3166: Make int -> float conversions correctly rounded.
1831 - Issue #1869 (and many duplicates): make round(x, n) correctly
1832 rounded for a float x, by using the decimal <-> binary conversions
1833 from Python/dtoa.c. As a consequence, (e.g.) round(x, 2) now
1834 consistently agrees with format(x, '.2f').
1836 - Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
1839 - Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.
1841 - Issue #5515: str.format() type 'n' combined with commas and leading
1842 zeros no longer gives odd results with ints and floats.
1844 - Implement PEP 378, Format Specifier for Thousands Separator, for
1847 - The str function switches to exponential notation at
1848 1e11, not 1e12. This avoids printing 13 significant digits in
1849 situations where only 12 of them are correct. Example problem
1850 value: str(1e11 + 0.5). (This minor issue has existed in 2.x for a
1853 - Issue #1580: On most platforms, use a 'short' float repr: for a
1854 finite float x, repr(x) now outputs a string based on the shortest
1855 sequence of decimal digits that rounds to x. Previous behaviour was
1856 to output 17 significant digits and then strip trailing zeros.
1857 Another minor difference is that the new repr switches to
1858 exponential notation at 1e16 instead of the previous 1e17; this
1859 avoids misleading output in some cases.
1861 There's a new sys attribute sys.float_repr_style, which takes
1862 the value 'short' to indicate that we're using short float repr,
1863 and 'legacy' if the short float repr isn't available for one
1866 The float repr change involves incorporating David Gay's 'perfect
1867 rounding' code into the Python core (it's in Python/dtoa.c). As a
1868 secondary consequence, all string-to-float and float-to-string
1869 conversions (including all float formatting operations) will be
1870 correctly rounded on these platforms.
1872 See issue #1580 discussions for details of platforms for which
1873 this change does not apply.
1875 - Issue #5759: float() didn't call __float__ on str subclasses.
1877 - The string.maketrans() function is deprecated; there is a new static method
1878 maketrans() on the bytes and bytearray classes. This removes confusion about
1879 the types string.maketrans() is supposed to work with, and mirrors the
1880 methods available on the str class.
1882 - Issue #2170: refactored xml.dom.minidom.normalize, increasing both
1883 its clarity and its speed.
1885 - Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
1886 to avoid compiler warnings.
1888 - Issue #3739: The unicode-internal encoder now reports the number of characters
1889 consumed like any other encoder (instead of the number of bytes).
1894 - Issue #5756: Install idle and pydoc with a 3 suffix.
1899 - Issue #5311: bdist_msi can now build packages that do not depend on a
1900 specific Python version.
1902 - Issue #5150: IDLE's format menu now has an option to strip trailing
1905 - Issue #5940: distutils.command.build_clib.check_library_list was not doing
1906 the right type checkings anymore.
1908 - Issue #4875: On win32, ctypes.util.find_library does no longer
1911 - Issue #5142: Add the ability to skip modules while stepping to pdb.
1913 - Issue #1309567: Fix linecache behavior of stripping subdirectories when
1914 looking for files given by a relative filename.
1916 - Issue #5923: Update the ``turtle`` module to version 1.1, add two new
1917 turtle demos in Demo/turtle.
1919 - Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
1920 extracting a file to the root directory.
1922 - Issue #5913: os.listdir() should fail for empty path on windows.
1924 - Issue #5084: unpickling now interns the attribute names of pickled objects,
1925 saving memory and avoiding growth in size of subsequent pickles. Proposal
1926 and original patch by Jake McGuire.
1928 - The json module now works exclusively with str and not bytes.
1930 - Issue #3959: The ipaddr module has been added to the standard library.
1931 Contributed by Google.
1933 - Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
1934 error when a named pipe is encountered, rather than blocking infinitely.
1936 - Issue #5857: tokenize.tokenize() now returns named tuples.
1938 - Issue #4305: ctypes should now build again on mipsel-linux-gnu
1940 - Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
1941 string is already in normalized form, by performing a quick check beforehand.
1942 Original patch by Rauli Ruohonen.
1944 - Issue #5853: calling a function of the mimetypes module from several threads
1945 at once could hit the recursion limit if the mimetypes database hadn't been
1948 - Issue #5854: Updated __all__ to include some missing names and remove some
1949 names which should not be exported.
1951 - Issue #3102: All global symbols that the _ctypes extension defines
1952 are now prefixed with 'Py' or '_ctypes'.
1954 - Issue #5041: ctypes does now allow pickling wide character.
1956 - Issue #5812: For the two-argument form of the Fraction constructor,
1957 Fraction(m, n), m and n are permitted to be arbitrary Rational
1960 - Issue #5812: Fraction('1e6') is valid: more generally, any string
1961 that's valid for float() is now valid for Fraction(), with the
1962 exception of strings representing NaNs and infinities.
1964 - Issue #5734: BufferedRWPair was poorly tested and had several glaring
1965 bugs. Patch by Brian Quinlan.
1967 - Issue #1161031: fix readwrite select flag handling: POLLPRI now
1968 results in a handle_expt_event call, not handle_read_event, and POLLERR
1969 and POLLNVAL now call handle_close, not handle_expt_event. Also,
1970 dispatcher now has an 'ignore_log_types' attribute for suppressing
1971 log messages, which is set to 'warning' by default.
1973 - Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
1974 new arguments introduced in 2.5.
1976 - Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
1977 makeunicodedata.py and regenerated the Unicode database (This fixes
1978 u'\u1d79'.lower() == '\x00').
1983 - Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
1986 - Issue #5463: In struct module, remove deprecated float coercion
1987 for integer type codes: struct.pack('L', 0.3) should now raise
1988 an error. The _PY_STRUCT_FLOAT_COERCE constant has been removed.
1989 The version number has been bumped to 0.3.
1991 - Issue #5359: Readd the Berkeley DB detection code to allow _dbm be built
1997 - Issue #5354: New test support function import_fresh_module() makes
1998 it easy to import both normal and optimised versions of modules.
1999 test_heapq and test_warnings have been adjusted to use it, tests for
2000 other modules with both C and Python implementations in the stdlib
2001 can be adjusted to use it over time.
2003 - Issue #5837: Certain sequences of calls to set() and unset() for
2004 support.EnvironmentVarGuard objects restored the environment variables
2005 incorrectly on __exit__.
2010 - Issue #5630: A replacement PyCObject API, PyCapsule, has been added.
2013 What's New in Python 3.1 alpha 2?
2014 =================================
2016 *Release date: 2009-4-4*
2021 - Implement PEP 378, Format Specifier for Thousands Separator, for
2024 - Issue #5666: Py_BuildValue's 'c' code should create byte strings.
2026 - Issue #5499: The 'c' code for argument parsing functions now only accepts a
2027 byte, and the 'C' code only accepts a unicode character.
2029 - Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
2030 when hitting the recursion limit under certain circumstances.
2032 - Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.
2034 - Fix a segfault when running test_exceptions with coverage, caused by
2035 insufficient checks in accessors of Exception.__context__.
2037 - Issue #5604: non-ASCII characters in module name passed to
2038 imp.find_module() were converted to UTF-8 while the path is
2039 converted to the default filesystem encoding, causing nonsense.
2041 - Issue #5126: str.isprintable() returned False for space characters.
2043 - Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
2044 the end sys.path, for compatibility with the system install of Python.
2046 - Issue #4688: Add a heuristic so that tuples and dicts containing only
2047 untrackable objects are not tracked by the garbage collector. This can
2048 reduce the size of collections and therefore the garbage collection overhead
2049 on long-running programs, depending on their particular use of datatypes.
2051 - Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
2052 improve its performance. Long divisions and remainder operations
2053 are now between 50% and 150% faster.
2055 - Issue #4258: Make it possible to use base 2**30 instead of base
2056 2**15 for the internal representation of integers, for performance
2057 reasons. Base 2**30 is enabled by default on 64-bit machines. Add
2058 --enable-big-digits option to configure, which overrides the
2059 default. Add sys.int_info structseq to provide information about
2060 the internal format.
2062 - Issue #4474: PyUnicode_FromWideChar now converts characters outside
2063 the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
2064 and sizeof(Py_UNICODE) == 2.
2066 - Issue #5237: Allow auto-numbered fields in str.format(). For
2067 example: '{} {}'.format(1, 2) == '1 2'.
2069 - Issue #5392: when a very low recursion limit was set, the interpreter would
2070 abort with a fatal error after the recursion limit was hit twice.
2072 - Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
2078 - Issue #2625: added missing items() call to the for loop in
2079 mailbox.MH.get_message().
2081 - Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
2082 error substitutions from non-strict codec error callbacks in
2083 incrementalencoder and StreamWriter.
2085 - Issue #5656: Fix the coverage reporting when running the test suite with
2088 - Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
2090 - Issue #5624: Fix the _winreg module name still used in several modules.
2092 - Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.
2094 - Issue #5619: Multiprocessing children disobey the debug flag and causes
2095 popups on windows buildbots. Patch applied to work around this issue.
2097 - Issue #5400: Added patch for multiprocessing on netbsd compilation/support
2099 - Issue #5387: Fixed mmap.move crash by integer overflow.
2101 - Issue #5261: Patch multiprocessing's semaphore.c to support context
2102 manager use: "with multiprocessing.Lock()" works now.
2104 - Issue #5236: Change time.strptime() to only take strings. Didn't work with
2105 bytes already but the failure was non-obvious.
2107 - Issue #5177: Multiprocessing's SocketListener class now uses
2108 socket.SO_REUSEADDR on all connections so that the user no longer needs
2109 to wait 120 seconds for the socket to expire.
2111 - Issue #5595: Fix UnboundedLocalError in ntpath.ismount().
2113 - Issue #1174606: Calling read() without arguments of an unbounded file
2114 (typically /dev/zero under Unix) could crash the interpreter.
2116 - The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
2117 io.BufferedRandom have been deprecated for removal in Python 3.2.
2119 - Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
2120 forever on incomplete input. That caused tarfile.open() to hang when used
2121 with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
2122 partial bzip2 compressed data.
2124 - Issue #2110: Add support for thousands separator and 'n' type
2125 specifier to Decimal.__format__
2127 - Fix Decimal.__format__ bug that swapped the meanings of the '<' and
2128 '>' alignment characters.
2130 - The error detection code in FileIO.close() could fail to reflect the `errno`
2131 value, and report it as -1 instead.
2133 - Issue #5016: FileIO.seekable() could return False if the file position
2134 was negative when truncated to a C int. Patch by Victor Stinner.
2139 - Issue #5391: mmap now deals exclusively with bytes.
2141 - Issue #5463: In struct module, remove deprecated overflow wrapping
2142 when packing an integer: struct.pack('=L', -1) now raises
2143 struct.error instead of returning b'\xff\xff\xff\xff'. The
2144 _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
2145 have been removed from the struct module.
2148 What's New in Python 3.1 alpha 1
2149 ================================
2151 *Release date: 2009-03-07*
2156 - The io module has been reimplemented in C for speed.
2158 - Give dict views an informative __repr__.
2160 - Issue #5247: Improve error message when unknown format codes are
2161 used when using str.format() with str, int, and float arguments.
2163 - Issue #5249: time.strftime returned malformed string when format string
2164 contained non ascii character on windows.
2166 - Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
2167 source has already been decoded into str.
2169 - Issue #5186: Reduce hash collisions for objects with no __hash__ method by
2170 rotating the object pointer by 4 bits to the right.
2172 - Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
2173 it now forces its argument to double before testing for infinity.
2175 - Issue #5137: Make len() correctly raise a TypeError when a __len__ method
2176 returns a non-number type.
2178 - Issue #5182: Removed memoryview.__str__.
2180 - Issue #1717: Removed builtin cmp() function, dropped tp_compare
2181 slot, the C API functions PyObject_Compare and PyUnicode_Compare and
2182 the type definition cmpfunc. The tp_compare slot has been renamed
2183 to tp_reserved, and is reserved for future usage.
2185 - Issue #1242657: the __len__() and __length_hint__() calls in several tools
2186 were suppressing all exceptions. These include list() and bytearray().
2188 - Issue #4707: round(x, n) now returns an integer if x is an integer.
2189 Previously it returned a float.
2191 - Issue #4753: By enabling a configure option named '--with-computed-gotos'
2192 on compilers that support it (notably: gcc, SunPro, icc), the bytecode
2193 evaluation loop is compiled with a new dispatch mechanism which gives
2194 speedups of up to 20%, depending on the system, on various benchmarks.
2196 - Issue #4874: Most builtin decoders now reject unicode input.
2198 - Issue #4842: Don't allow trailing 'L' when constructing an integer
2201 - Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.
2203 - Issue #4838: When a module is deallocated, free the memory backing the
2204 optional module state data.
2206 - Issue #4910: Rename nb_long slot to nb_reserved, and change its
2209 - Issue #4935: The overflow checking code in the expandtabs() method common
2210 to str, bytes and bytearray could be optimized away by the compiler, letting
2211 the interpreter segfault instead of raising an error.
2213 - Issue #3720: Fix a crash when an iterator modifies its class and removes its
2216 - Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
2217 function no longer attempt to call the __long__ slot to convert an object
2218 to an integer. Only the __int__ and __trunc__ slots are examined.
2220 - Issue #4893: Use NT threading on CE.
2222 - Issue #4915: Port sysmodule to Windows CE.
2224 - Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
2225 common cases are optimized thanks to a dedicated fast path and a moderate
2226 amount of loop unrolling.
2228 - Issue #4074: Change the criteria for doing a full garbage collection (i.e.
2229 collecting the oldest generation) so that allocating lots of objects without
2230 destroying them does not show quadratic performance. Based on a proposal by
2232 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
2234 - Issue #4604: Some objects of the I/O library could still be used after
2235 having been closed (for instance, a read() call could return some
2236 previously buffered data). Patch by Dmitry Vasiliev.
2238 - Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
2239 flag to work properly. Furthermore, when specifying -u, the text stdout
2240 and stderr streams have line-by-line buffering enabled (the default being
2241 to buffer arbitrary chunks of data).
2243 - The internal table, _PyLong_DigitValue, is now an array of unsigned chars
2244 instead of ints (reducing its size from 4 to 8 times thereby reducing
2245 Python's overall memory).
2247 - Issue #1180193: When importing a module from a .pyc (or .pyo) file with
2248 an existing .py counterpart, override the co_filename attributes of all
2249 code objects if the original filename is obsolete (which can happen if the
2250 file has been renamed, moved, or if it is accessed through different paths).
2251 Patch by Ziga Seilnacht and Jean-Paul Calderone.
2253 - Issue #4580: Fix slicing of memoryviews when the item size is greater than
2254 one byte. Also fixes the meaning of len() so that it returns the number of
2255 items, rather than the size in bytes.
2257 - Issue #4075: Use OutputDebugStringW in Py_FatalError.
2259 - Issue #4747: When the terminal does not use utf-8, executing a script with
2260 non-ascii characters in its name could fail with a "SyntaxError: None" error.
2262 - Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
2263 file with `bytes' filename on Windows.
2265 - Issue #3680: Reference cycles created through a dict, set or deque iterator
2266 did not get collected.
2268 - Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
2269 where the tp_hash and tp_dict slots are both NULL.
2271 - Issue #4759: None is now allowed as the first argument of
2272 bytearray.translate(). It was always allowed for bytes.translate().
2274 - Added test case to ensure attempts to read from a file opened for writing
2277 - Issue #3106: Speedup some comparisons (str/str and int/int).
2279 - Issue #2183: Simplify and optimize bytecode for list, dict and set
2280 comprehensions. Original patch for list comprehensions by Neal Norwitz.
2282 - Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
2283 print elapsed times, not only when some objects are uncollectable /
2284 unreachable. Original patch by Neil Schemenauer.
2286 - Issue #3439: Add a bit_length method to int.
2288 - Issue #2173: When getting device encoding, check that return value of
2289 nl_langinfo is not the empty string. This was causing silent build
2292 - Issue #4597: Fixed several opcodes that weren't always propagating
2295 - Issue #4589: Fixed exception handling when the __exit__ function of a
2296 context manager returns a value that cannot be converted to a bool.
2298 - Issue #4445: Replace "sizeof(PyBytesObject)" with
2299 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
2300 bytes instances. On a typical machine this saves 3 bytes of memory
2301 (on average) per allocation of a bytes instance.
2303 - Issue #4533: File read operation was dreadfully slow due to a slowly
2304 growing read buffer. Fixed by using the same growth rate algorithm as
2307 - Issue #4509: Various issues surrounding resize of bytearray objects to
2308 which there are buffer exports (e.g. memoryview instances).
2310 - Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
2311 method on file objects with closefd=False. The file descriptor is still
2312 kept open but the file object behaves like a closed file. The ``FileIO``
2313 object also got a new readonly attribute ``closefd``.
2315 - Issue #4569: Interpreter crash when mutating a memoryview with an item size
2318 - Issue #4748: Lambda generators no longer return a value.
2320 - The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
2322 - Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
2323 PyUnicode_DecodeUTF8() once, remember the result and output it in a second
2324 step. This avoids problems with counting UTF-8 bytes that ignores the effect
2325 of using the replace error handler in PyUnicode_DecodeUTF8().
2330 - Issue #6545: Removed assert statements in distutils.Extension, so the
2331 behavior is similar when used with -O.
2333 - Issue #6459: distutils.command.build_ext.get_export_symbols now uses the
2334 "PyInit" prefix, rather than "init".
2336 - Issue #6433: fixed issues with multiprocessing.pool.map hanging on empty list
2338 - Issue #6455: Fixed test_build_ext under win32.
2340 - Issue #6413: Fixed the log level in distutils.dist for announce.
2342 - Issue #6403: Fixed package path usage in build_ext.
2344 - Issue #6365: Distutils build_ext inplace mode was copying the compiled
2345 extension in a subdirectory if the extension name had dots.
2347 - Issue #6287: Added the license field in Distutils documentation.
2349 - Issue #6263: Fixed syntax error in distutils.cygwincompiler.
2351 - Issue #5201: distutils.sysconfig.parse_makefile() now understands `$$`
2352 in Makefiles. This prevents compile errors when using syntax like:
2353 `LDFLAGS='-rpath=\$$LIB:/some/other/path'`. Patch by Floris Bruynooghe.
2355 - Issue #6131: test_modulefinder leaked when run after test_distutils.
2356 Patch by Hirokazu Yamamoto.
2358 - Issue #6048: Now Distutils uses the tarfile module in archive_util.
2360 - Issue #6062: In distutils, fixed the package option of build_ext. Feedback
2361 and tests on pywin32 by Tim Golden.
2363 - Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.
2365 - Issue #6046: Fixed the library extension when distutils build_ext is used
2366 inplace. Initial patch by Roumen Petrov.
2368 - Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
2371 - Issue #6022: a test file was created in the current working directory by
2372 test_get_outputs in Distutils.
2374 - Issue #5977: distutils build_ext.get_outputs was not taking into account the
2375 inplace option. Initial patch by kxroberto.
2377 - Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
2378 for old-style extensions.
2380 - Issue #5976: Fixed Distutils test_check_environ.
2382 - Issue #5941: Distutils build_clib command was not working anymore because
2383 of an incomplete costumization of the archiver command. Added ARFLAGS in the
2384 Makefile besides AR and make Distutils use it. Original patch by David
2387 - Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.
2389 - Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
2392 - Issue #5810: Fixed Distutils test_build_scripts so it uses
2393 sysconfig.get_config_vars.
2395 - Issue #4951: Fixed failure in test_httpservers.
2397 - Issue #5795: Fixed test_distutils failure on Debian ppc.
2399 - Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.
2401 - Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
2402 a value in SafeConfigParser.
2404 - Issue #5732: added a new command in Distutils: check.
2406 - Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
2407 platforms. Initial patch by Paul Moore.
2409 - Issue #5095: Added bdist_msi to the list of bdist supported formats.
2410 Initial fix by Steven Bethard.
2412 - Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
2413 Initial fix by Wayne Davison.
2415 - Issue #5694: removed spurious test output in Distutils (test_clean).
2417 - Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
2419 - Issue #1665206 (partially): Move imports in cgitb to the top of the module
2420 instead of performing them in functions. Helps prevent import deadlocking in
2423 - Issue #2522: locale.format now checks its first argument to ensure it has
2424 been passed only one pattern, avoiding mysterious errors where it appeared
2425 that it was failing to do localization.
2427 - Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
2430 - Issue #1222: locale.format() bug when the thousands separator is a space
2433 - Issue #5472: Fixed distutils.test_util tear down. Original patch by
2436 - collections.deque() objects now have a read-only attribute called maxlen.
2438 - Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
2439 it is has been populated and properly configured in order to prevent
2442 - Issue #4792: Prevent a segfault in _tkinter by using the
2443 guaranteed to be safe interp argument given to the PythonCmd in place of
2444 the Tcl interpreter taken from a PythonCmd_ClientData.
2446 - Issue #5193: Guarantee that tkinter.Text.search returns a string.
2448 - Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
2449 Original patch by Akira Kitada.
2451 - Issue #5334: array.fromfile() failed to insert values when EOFError was raised.
2453 - Issue #5385: Fixed mmap crash after resize failure on windows.
2455 - Issue #5179: Fixed subprocess handle leak on failure on windows.
2457 - PEP 372: Added collections.OrderedDict().
2459 - The _asdict() for method for namedtuples now returns an OrderedDict().
2461 - configparser now defaults to using an ordered dictionary.
2463 - Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
2464 import guess_extension`` was used.
2466 - Issue #1733986: Fixed mmap crash in accessing elements of second map object
2467 with same tagname but larger size than first map. (Windows)
2469 - Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
2472 - Issue #1533164: Installed but not listed *.pyo was breaking Distutils
2475 - Issue #5378: added --quiet option to Distutils bdist_rpm command.
2477 - Issue #5052: make Distutils compatible with 2.3 again.
2479 - Issue #5316: Fixed buildbot failures introduced by multiple inheritance
2482 - Issue #5287: Add exception handling around findCaller() call to help out
2485 - Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
2486 The file was resized to wrong size.
2488 - Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
2490 - Issue #2279: distutils.sdist.add_defaults now add files
2491 from the package_data and the data_files metadata.
2493 - Issue #5257: refactored all tests in distutils, so they use
2494 support.TempdirManager, to avoid writing in the tests directory.
2496 - Issue #4524: distutils build_script command failed with --with-suffix=3.
2497 Initial patch by Amaury Forgeot d'Arc.
2499 - Issue #2461: added tests for distutils.util
2501 - Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
2502 which inherited from numbers.py which did not have __slots__ defined. The
2503 numbers hierarchy now has its own __slots__ declarations.
2505 - Issue #4631: Fix urlopen() result when an HTTP response uses chunked
2508 - Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
2509 function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
2511 - Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
2512 under NT and OS2. Patch by Philip Jenvey.
2514 - Issue #5128: Make compileall properly inspect bytecode to determine if needs
2515 to be recreated. This avoids a timing hole thanks to the old reliance on the
2516 ctime of the files involved.
2518 - Issue #5122: Synchronize tk load failure check to prevent a potential
2521 - Issue #1818: collections.namedtuple() now supports a keyword argument
2522 'rename' which lets invalid fieldnames be automatically converted to
2523 positional names in the form, _1, _2, ...
2525 - Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
2527 - Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
2528 public documented method ``ZipImporter.get_filename()``.
2530 - Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
2531 the execution of packages by looking for and executing a ``__main__``
2532 submodule when a package name is supplied. Initial patch by Andi
2535 - Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
2536 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
2537 Tkapp_Call when calling from a thread different than the one that created
2538 the Tcl interpreter. Patch by Robert Hancock.
2540 - Issue #4285: Change sys.version_info to be a named tuple. Patch by
2543 - Issue #1520877: Now distutils.sysconfig reads $AR from the
2544 environment/Makefile. Patch by Douglas Greiman.
2546 - Issue #1276768: The verbose option was not used in the code of
2547 distutils.file_util and distutils.dir_util.
2549 - Issue #5132: Fixed trouble building extensions under Solaris with
2550 --enabled-shared activated. Initial patch by Dave Peterson.
2552 - Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
2554 - The shelve module now defaults to pickle protocol 3.
2556 - Fix a bug in the trace module where a bytes object from co_lnotab had its
2557 items being passed through ord().
2559 - Issue #2047: shutil.move() could believe that its destination path was
2560 inside its source path if it began with the same letters (e.g. "src" vs.
2563 - Added the ttk module. See issue #2983: Ttk support for Tkinter.
2565 - Removed isSequenceType(), isMappingType, and isNumberType() from the
2566 operator module; use the abstract base classes instead. Also removed
2567 the repeat() function; use mul() instead.
2569 - Issue #5021: doctest.testfile() did not create __name__ and
2570 collections.namedtuple() relied on __name__ being defined.
2572 - Backport importlib from Python 3.1. Only the import_module() function has
2573 been backported to help facilitate transitions from 2.7 to 3.1.
2575 - Issue #1885: distutils. When running sdist with --formats=tar,gztar
2576 the tar file was overriden by the gztar one.
2578 - Issue #4863: distutils.mwerkscompiler has been removed.
2580 - Added a new itertools functions: combinations_with_replacement()
2583 - Issue #5032: added a step argument to itertools.count() and
2584 allowed non-integer arguments.
2586 - Fix and properly document the multiprocessing module's logging
2587 support, expose the internal levels and provide proper usage
2590 - Issue #1672332: fix unpickling of subnormal floats, which was
2591 producing a ValueError on some platforms.
2593 - Issue #3881: Help Tcl to load even when started through the
2594 unreadable local symlink to "Program Files" on Vista.
2596 - Issue #4710: Extract directories properly in the zipfile module;
2597 allow adding directories to a zipfile.
2599 - Issue #3807: _multiprocessing build fails when configure is passed
2600 --without-threads argument. When this occurs, _multiprocessing will
2601 be disabled, and not compiled.
2603 - Issue #5008: When a file is opened in append mode with the new IO library,
2604 do an explicit seek to the end of file (so that e.g. tell() returns the
2605 file size rather than 0). This is consistent with the behaviour of the
2606 traditional 2.x file object.
2608 - Issue #5013: Fixed a bug in FileHandler which occurred when the delay
2611 - Issue #4842: Always append a trailing 'L' when pickling longs using
2612 pickle protocol 0. When reading, the 'L' is optional.
2614 - Add the importlib package.
2616 - Issue #4301: Patch the logging module to add processName support, remove
2617 _check_logger_class from multiprocessing.
2619 - Issue #3325: Remove python2.x try: except: imports for old cPickle from
2622 - Issue #4959: inspect.formatargspec now works for keyword only arguments
2625 - Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
2626 for *nix machines for negative handles and large int handles. Without this check
2627 it is possible to segfault the interpreter.
2629 - Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
2632 - Issue #1225107: inspect.isclass() returned True for instances with a custom
2635 - Issue #3826 and #4791: The socket module now closes the underlying socket
2636 appropriately when it is being used via socket.makefile() objects
2637 rather than delaying the close by waiting for garbage collection to do it.
2639 - Issue #1696199: Add collections.Counter() for rapid and convenient
2642 - Issue #3860: GzipFile and BZ2File now support the context manager protocol.
2644 - Issue #4867: Fixed a crash in ctypes when passing a string to a
2645 function without defining argtypes.
2647 - Issue #4272: Add an optional argument to the GzipFile constructor to override
2648 the timestamp in the gzip stream. The default value remains the current time.
2649 The information can be used by e.g. gunzip when decompressing. Patch by
2652 - Restore Python 2.3 compatibility for decimal.py.
2654 - Issue #3638: Remove functions from _tkinter module level that depend on
2655 TkappObject to work with multiple threads.
2657 - Issue #4718: Adapt the wsgiref package so that it actually works with
2658 Python 3.x, in accordance with the `official amendments of the spec
2659 <http://www.wsgi.org/wsgi/Amendments_1.0>`_.
2661 - Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
2662 to the decimal module.
2664 - Fractions.from_float() no longer loses precision for integers too big to
2667 - Issue #4812: add missing underscore prefix to some internal-use-only
2668 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
2670 - Issue #4790: The nsmallest() and nlargest() functions in the heapq module
2671 did unnecessary work in the common case where no key function was specified.
2673 - Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
2674 the function is not a generator.
2676 - Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
2677 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
2679 - Issue #4646: distutils was choking on empty options arg in the setup
2680 function. Original patch by Thomas Heller.
2682 - Issue #3767: Convert Tk object to string in tkColorChooser.
2684 - Issue #3248: Allow placing ScrolledText in a PanedWindow.
2686 - Issue #4444: Allow assertRaises() to be used as a context handler, so that
2687 the code under test can be written inline if more practical.
2689 - Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
2690 works as expected in the interactive environment.
2692 - Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
2695 - Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
2698 - Issue #4223: inspect.getsource() will now correctly display source code
2699 for packages loaded via zipimport (or any other conformant PEP 302
2700 loader). Original patch by Alexander Belopolsky.
2702 - Issue #4201: pdb can now access and display source code loaded via
2703 zipimport (or any other conformant PEP 302 loader). Original patch by
2704 Alexander Belopolsky.
2706 - Issue #4197: doctests in modules loaded via zipimport (or any other PEP
2707 302 conformant loader) will now work correctly in most cases (they
2708 are still subject to the constraints that exist for all code running
2709 from inside a module loaded via a PEP 302 loader and attempting to
2710 perform IO operations based on __file__). Original patch by
2711 Alexander Belopolsky.
2713 - Issues #4082 and #4512: Add runpy support to zipimport in a manner that
2714 allows backporting to maintenance branches. Original patch by
2715 Alexander Belopolsky.
2717 - Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
2720 - Issue #4616: TarFile.utime(): Restore directory times on Windows.
2722 - Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
2723 codec cannot be found. This is for compatibility with the builtin behavior.
2725 - Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
2726 give correct results in the case where one argument is a quiet NaN
2727 and the other is a finite number that requires rounding.
2729 - Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
2732 - Added the subprocess.check_call_output() convenience function to get output
2733 from a subprocess on success or raise an exception on error.
2735 - Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
2736 support unusual filenames (such as those containing semi-colons) in
2737 Content-Disposition headers.
2739 - Issue #4384: Added logging integration with warnings module using
2740 captureWarnings(). This change includes a NullHandler which does nothing;
2741 it will be of use to library developers who want to avoid the "No handlers
2742 could be found for logger XXX" message which can appear if the library user
2743 doesn't configure logging.
2745 - Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
2748 - Issue #4529: fix the parser module's validation of try-except-finally
2751 - Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
2752 not a malformed option.
2754 - Added the subprocess.check_output() convenience function to get output
2755 from a subprocess on success or raise an exception on error.
2757 - Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
2758 the corresponding tests now pass.
2760 - Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
2761 it was calling the wrong open() function.
2763 - Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
2764 support unusual filenames (such as those containing semi-colons) in
2765 Content-Disposition headers.
2767 - Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
2768 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
2770 - Issue #5104: The socket module now raises OverflowError when 16-bit port and
2771 protocol numbers are supplied outside the allowed 0-65536 range on bind()
2772 and getservbyport().
2774 - Windows locale mapping updated to Vista.
2779 - Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
2780 and make it 2.6-compatible.
2782 - Ttk demos added in Demo/tkinter/ttk/
2784 - Issue #4677: add two list comprehension tests to pybench.
2790 - Issue #6094: Build correctly with Subversion 1.7.
2792 - Issue #5847: Remove -n switch on "Edit with IDLE" menu item.
2794 - Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
2795 linker, rather than always exit successfully. Patch by Floris Bruynooghe.
2797 - Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
2798 the order that backends for the dbm extension are checked.
2800 - Link the shared python library with $(MODLIBS).
2802 - Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
2804 - Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
2806 - Issue #4895: Use _strdup on Windows CE.
2808 - Issue #4472: "configure --enable-shared" now works on OSX
2810 - Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
2812 - Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
2814 - Issue #4289: Remove Cancel button from AdvancedDlg.
2816 - Issue #1656675: Register a drop handler for .py* files on Windows.
2818 - Issue #4120: Exclude manifest from extension modules in VS2008.
2820 - Issue #4091: Install pythonxy.dll in system32 again.
2822 - Issue #4018: Disable "for me" installations on Vista.
2824 - Issue #3758: Add ``patchcheck`` build target to .PHONY.
2826 - Issue #4204: Fixed module build errors on FreeBSD 4.
2832 - Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
2833 for negative arguments. Previously, it raised TypeError.
2835 - Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
2837 - Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
2838 the GIL is released, or owned by another thread.
2840 - Issue #4122: On Windows, fix a compilation error when using the
2841 Py_UNICODE_ISSPACE macro in an extension module.
2847 - Issue #3745: Fix hashlib to always reject unicode and non buffer-api
2848 supporting objects as input no matter how it was compiled (built in
2849 implementations or external openssl library).
2851 - Issue #4397: Fix occasional test_socket failure on OS X.
2853 - Issue #4279: Fix build of parsermodule under Cygwin.
2855 - Issue #4751: hashlib now releases the GIL when hashing large buffers
2856 (with a hardwired threshold of 2048 bytes), allowing better parallelization
2857 on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
2859 - Issue #4051: Prevent conflict of UNICODE macros in cPickle.
2861 - Issue #4738: Each zlib object now has a separate lock, allowing to compress
2862 or decompress several streams at once on multi-CPU systems. Also, the GIL
2863 is now released when computing the CRC of a large buffer. Patch by ebfe.
2865 - Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
2867 - Issue #1040026: Fix os.times result on systems where HZ is incorrect.
2869 - Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
2872 - Issue #4583: array.array would not always prohibit resizing when a buffer
2873 has been exported, resulting in an interpreter crash when accessing the
2877 - Issue #5228: Make functools.partial objects can now be pickled.
2882 - Issue #5450: Moved tests involving loading tk from Lib/test/test_tcl to
2883 Lib/tkinter/test/test_tkinter/test_loadtk. With this, these tests demonstrate
2884 the same behaviour as test_ttkguionly (and now also test_tk) which is to
2885 skip the tests if DISPLAY is defined but can't be used.
2887 - regrtest no longer treats ImportError as equivalent to SkipTest. Imports
2888 that should cause a test to be skipped are now done using import_module
2889 from test support, which does the conversion.
2891 - Issue #5083: New 'gui' resource for regrtest.
2898 **(For information about older versions, consult the HISTORY file.)**