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+++++++++++
Python News
+++++++++++
What's New in Python 3.1.3?
===========================
*Release date: 20XX-XX-XX*
Core and Builtins
-----------------
- Issue #10006: type.__abstractmethods__ now raises an AttributeError. As a
result metaclasses can now be ABCs (see #9533).
- Issue #9997: Don't let the name "top" have special significance in scope
resolution.
- Issue #9930: Remove bogus subtype check that was causing (e.g.)
float.__rdiv__(2.0, 3) to return NotImplemented instead of the
expected 1.5.
- Issue #9804: ascii() now always represents unicode surrogate pairs as
a single ``\UXXXXXXXX``, regardless of whether the character is printable
or not. Also, the "backslashreplace" error handler now joins surrogate
pairs into a single character on UCS-2 builds.
- Issue #9797: pystate.c wrongly assumed that zero couldn't be a valid
thread-local storage key.
- Issue #9737: Fix a crash when trying to delete a slice or an item from
a memoryview object.
- Issue #7415: PyUnicode_FromEncodedObject() now uses the new buffer API
properly. Patch by Stefan Behnel.
- Restore GIL in nis_cat in case of error.
- Issue #9712: Fix tokenize on identifiers that start with non-ascii names.
- Issue #9688: __basicsize__ and __itemsize__ must be accessed as Py_ssize_t.
- Issue #5319: Print an error if flushing stdout fails at interpreter
shutdown.
- Issue #8814: function annotations (the ``__annotations__`` attribute)
are now included in the set of attributes copied by default by
functools.wraps and functools.update_wrapper. Patch by Terrence Cole.
- Issue #83755: Implicit set-to-frozenset conversion was not thread-safe.
- Issue #10068: Global objects which have reference cycles with their module's
dict are now cleared again. This causes issue #7140 to appear again.
- Issue #9416: Fix some issues with complex formatting where the
output with no type specifier failed to match the str output:
- format(complex(-0.0, 2.0), '-') omitted the real part from the output,
- format(complex(0.0, 2.0), '-') included a sign and parentheses.
- Issue #7616: Fix copying of overlapping memoryview slices with the Intel
compiler.
- Issue #8271: during the decoding of an invalid UTF-8 byte sequence, only the
start byte and the continuation byte(s) are now considered invalid, instead
of the number of bytes specified by the start byte.
E.g.: '\xf1\x80AB'.decode('utf-8', 'replace') now returns u'\ufffdAB' and
replaces with U+FFFD only the start byte ('\xf1') and the continuation byte
('\x80') even if '\xf1' is the start byte of a 4-bytes sequence.
Previous versions returned a single u'\ufffd'.
- Issue #6543: Write the traceback in the terminal encoding instead of utf-8.
Fix the encoding of the modules filename. Patch written by Amaury Forgeot
d'Arc.
- Issue #9058: Remove assertions about INT_MAX in UnicodeDecodeError.
- Issue #8941: decoding big endian UTF-32 data in UCS-2 builds could crash
the interpreter with characters outside the Basic Multilingual Plane
(higher than 0x10000).
- In the str.format(), raise a ValueError when indexes to arguments are too
large.
- Issue #8766: Initialize _warnings module before importing the first module.
Fix a crash if an empty directory called "encodings" exists in sys.path.
- PyObject_Dump() encodes unicode objects to utf8 with backslashreplace
(instead of strict) error handler to escape surrogates
- Issue #8124: PySys_WriteStdout() and PySys_WriteStderr() don't execute
indirectly Python signal handlers anymore because mywrite() ignores
exceptions (KeyboardInterrupt)
- Issue #8092: Fix PyUnicode_EncodeUTF8() to support error handler producing
unicode string (eg. backslashreplace)
- Issue #8014: Setting a T_UINT or T_PYSSIZET attribute of an object with
PyMemberDefs could produce an internal error; raise TypeError instead.
- Issue #8417: Raise an OverflowError when an integer larger than sys.maxsize is
passed to bytes or bytearray.
- Issue #8329: Don't return the same lists from select.select when no fds are
changed.
- Raise a TypeError when trying to delete a T_STRING_INPLACE struct member.
- Issue #8226: sys.setfilesystemencoding() raises a LookupError if the encoding
is unknown
- Issue #1583863: An str subclass can now override the __str__ method
- Issue #7072: isspace(0xa0) is true on Mac OS X
C-API
-----
- Issue #9834: Don't segfault in PySequence_GetSlice, PySequence_SetSlice, or
PySequence_DelSlice when the object doesn't have any mapping operations
defined.
- Issue #5753: A new C API function, :cfunc:`PySys_SetArgvEx`, allows
embedders of the interpreter to set sys.argv without also modifying
sys.path. This helps fix `CVE-2008-5983
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5983>`_.
Library
-------
- Issue #5117: Case normalization was needed on ntpath.relpath(). And
fixed root directory issue on posixpath.relpath(). (Ported working fixes
from ntpath)
- Issue #10041: The signature of optional arguments in socket.makefile()
didn't match that of io.open(), and they also didn't get forwarded
properly to TextIOWrapper in text mode. Patch by Kai Zhu.
- Issue #6612: Fix site and sysconfig to catch os.getcwd() error, eg. if the
current directory was deleted. Patch written by W. Trevor King.
- Issue #9759: GzipFile now raises ValueError when an operation is attempted
after the file is closed. Patch by Jeffrey Finkelstein.
- Issue #9042: Fix interaction of custom translation classes and caching in
gettext.
- Issue #9065: tarfile no longer uses "root" as the default for the uname and
gname field.
- Issue #8980: Fixed a failure in distutils.command check that was shadowed
by an environment that does not have docutils. Patch by Arfrever.
- Issue #1050268: parseaddr now correctly quotes double quote and backslash
characters that appear inside quoted strings in email addresses.
- Issue #10004: quoprimime no longer generates a traceback when confronted
with invalid characters after '=' in a Q-encoded word.
- Issue #9950: Fix socket.sendall() crash or misbehaviour when a signal is
received. Now sendall() properly calls signal handlers if necessary,
and retries sending if these returned successfully, including on sockets
with a timeout.
- Issue #9936: Fixed executable lines' search in the trace module.
- Issue #9928: Properly initialize the types exported by the bz2 module.
- Issue #9854: The default read() implementation in io.RawIOBase now
handles non-blocking readinto() returning None correctly.
- Issue #9853: Fix the signature of SSLSocket.recvfrom() and
SSLSocket.sendto() to match the corresponding socket methods.
- Issue #9792: In case of connection failure, socket.create_connection()
would swallow the exception and raise a new one, making it impossible
to fetch the original errno, or to filter timeout errors. Now the
original error is re-raised.
- Issue #9826: OrderedDict.__repr__ can now handle self-referential
values: d['x'] = d.
- Issue #9758: When fcntl.ioctl() was called with mutable_flag set to True,
and the passed buffer was exactly 1024 bytes long, the buffer wouldn't
be updated back after the system call. Original patch by Brian Brazil.
- Issue #6656: fix locale.format_string to handle escaped percents
and mappings.
- Issue #1100562: Fix deep-copying of objects derived from the list and
dict types. Patch by Michele Orrù and Björn Lindqvist.
- Issue #9753: Fixed socket.dup, which did not always work correctly
on Windows.
- Issue #1868: Eliminate subtle timing issues in thread-local objects by
getting rid of the cached copy of thread-local attribute dictionary.
- Issue #8797: urllib2 does a retry for Basic Authentication failure instead of
falling into recursion.
- Issue #1194222: email.utils.parsedate now returns RFC2822 compliant four
character years even if the message contains RFC822 two character years.
- Issue #8750: Fixed MutableSet's methods to correctly handle
reflexive operations, namely x -= x and x ^= x.
- Issue #9129: smtpd.py is vulnerable to DoS attacks deriving from missing
error handling when accepting a new connection.
- Issue #658749: asyncore's connect() method now correctly interprets winsock
errors.
- Issue #9214: Set operations on KeysView or ItemsView in the collections
module now correctly return a set. (Patch by Eli Bendersky.)
- Issue #9617: Signals received during a low-level write operation aren't
ignored by the buffered IO layer anymore.
- Issue #9605: posix.getlogin() decodes the username with file filesystem
encoding and surrogateescape error handler. Patch written by David Watson.
- Issue #9603: posix.ttyname() and posix.ctermid() decode the terminal name
using the filesystem encoding and surrogateescape error handler. Patch
written by David Watson.
- Issue #8688: MANIFEST files created by distutils now include a magic
comment indicating they are generated. Manually maintained MANIFESTs
without this marker will not be overwritten or removed.
- Issue #7467: when reading a file from a ZIP archive, its CRC is checked
and a BadZipfile error is raised if it doesn't match (as used to be the
case in Python 2.5 and earlier).
- Issue #9550: a BufferedReader could issue an additional read when the
original read request had been satisfied, which could block indefinitely
when the underlying raw IO channel was e.g. a socket. Report and original
patch by Jason V. Miller.
- Issue #6915: Under Windows, os.listdir() didn't release the Global
Interpreter Lock around all system calls. Original patch by Ryan Kelly.
- Issue #3757: thread-local objects now support cyclic garbage collection.
Thread-local objects involved in reference cycles will be deallocated
timely by the cyclic GC, even if the underlying thread is still running.
- Fix Issue8280 - urllib2's Request method will remove fragements in the url.
This is how it is supposed to work, wget and curl do the same. Previous
behavior was wrong.
- Issue #2944: asyncore doesn't handle connection refused correctly.
- Issue #3196: email header decoding is now forgiving if an RFC2047
encoded word encoded in base64 is lacking padding.
- Issue #8447: Make distutils.sysconfig follow symlinks in the path to
the interpreter executable. This fixes a failure of test_httpservers
on OS X.
- Issue #7372: Fix pstats regression when stripping paths from profile
data generated with the profile module.
- Issue #4108: In urllib.robotparser, if there are multiple 'User-agent: *'
entries, consider the first one.
- Issue #8397: Raise an error when attempting to mix iteration and regular
reads on a BZ2File object, rather than returning incorrect results.
- Issue #7909: Do not touch paths with the special prefixes ``\\.\``
or ``\\?\`` in ntpath.normpath().
- Issue #5294: Fix the behavior of pdb's "continue" command when called
in the top-level debugged frame.
- Issue #5727: Restore the ability to use readline when calling into pdb
in doctests.
- Issue #6719: In pdb, do not stop somewhere in the encodings machinery
if the source file to be debugged is in a non-builtin encoding.
- Issue #8048: Prevent doctests from failing when sys.displayhook has
been reassigned.
- Issue #8015: In pdb, do not crash when an empty line is entered as
a breakpoint command.
- Issue #5146: Handle UID THREAD command correctly in imaplib.
- Issue #5147: Fix the header generated for cookie files written by
http.cookiejar.MozillaCookieJar.
- Issue #8198: In pydoc, output all help text to the correct stream
when sys.stdout is reassigned.
- Issue #8230: Fix Lib/test/sortperf.py.
- Issue #7395: Fix tracebacks in pstats interactive browser.
- Issue #1713: Fix os.path.ismount(), which returned true for symbolic links
across devices.
- Issue #8826: Properly load old-style "expires" attribute in http.cookies.
- Issue #1690103: Fix initial namespace for code run with trace.main().
- Issue #9354: Provide getsockopt() in asyncore's file_wrapper.
- Issue #9448: Fix a leak of OS resources (mutexes or semaphores) when
re-initializing a buffered IO object by calling its ``__init__`` method.
- Issue #8620: when a Cmd is fed input that reaches EOF without a final
newline, it no longer truncates the last character of the last command line.
- Issue #3704: http.cookiejar was not properly handling URLs with a / in the
parameters.
- Issue #4629: getopt raises an error if an argument ends with = whereas getopt
doesn't except a value (eg. --help= is rejected if getopt uses ['help='] long
options).
- Issue #7895: platform.mac_ver() no longer crashes after calling os.fork()
- Issue #9323: Fixed a bug in trace.py that resulted in loosing the
name of the script being traced. Patch by Eli Bendersky.
- Issue #9282: Fixed --listfuncs option of trace.py. Thanks Eli
Bendersky for the patch.
- Issue #1555570: email no longer inserts extra blank lines when a \r\n
combo crosses an 8192 byte boundary.
- Issue #9243: Fix sndhdr module and add unit tests, contributed by James Lee.
- Issue #9137: Fix issue in MutableMapping.update, which incorrectly
treated keyword arguments called 'self' or 'other' specially.
- Issue #7646: The fnmatch pattern cache no longer grows without bound.
- Issue #9136: Fix 'dictionary changed size during iteration'
RuntimeError produced when profiling the decimal module. This was
due to a dangerous iteration over 'locals()' in Context.__init__.
- Fix extreme speed issue in Decimal.pow when the base is an exact
power of 10 and the exponent is tiny (for example,
Decimal(10) ** Decimal('1e-999999999')).
- Issue #9130: Fix validation of relative imports in parser module.
- Issue #9128: Fix validation of class decorators in parser module.
- Issue #5468: urlencode to handle bytes type and other encodings in its query
parameter. Patch by Dan Mahn.
- Issue #7673: Fix security vulnerability (CVE-2010-2089) in the audioop
module, ensure that the input string length is a multiple of the frame size
- Issue #6589: cleanup asyncore.socket_map in case smtpd.SMTPServer constructor
raises an exception.
- Issue #9075: In the ssl module, remove the setting of a ``debug`` flag
on an OpenSSL structure.
- Issue #8682: The ssl module now temporary increments the reference count of
a socket object got through ``PyWeakref_GetObject``, so as to avoid possible
deallocation while the object is still being used.
- Issue #1368368: FancyURLOpener class changed to throw an Exception on wrong
password instead of presenting an interactive prompt. Older behavior can be
obtained by passing retry=True to http_error_xxx methods of FancyURLOpener.
- Issue #8203: Fix IDLE Credits dialog: view_file() uses its encoding argument.
- Issue #8720: fix regression caused by fix for #4050 by making getsourcefile
smart enough to find source files in the linecache.
- Issue #5610: feedparser no longer eats extra characters at the end of
a body part if the body part ends with a \r\n.
- Fix codecs.escape_encode to return the correct consumed size.
- Issue #8897: Fix sunau module, use bytes to write the header. Patch written
by Thomas Jollans.
- Issue #6470: Drop UNC prefix in FixTk.
- Issue #4768: base64 encoded email body parts were incorrectly stored as
binary strings. They are now correctly converted to strings.
- Issue #8833: tarfile created hard link entries with a size field != 0 by
mistake.
- Charset.body_encode now correctly handles base64 encoding by encoding
with the output_charset before calling base64mime.encode. Passes the
tests from 2.x issue #1368247.
- Issue #7150: Raise OverflowError if the result of adding or subtracting
timedelta from date or datetime falls outside of the MINYEAR:MAXYEAR range.
- Issue #4769: Fix main() function of the base64 module, use sys.stdin.buffer
and sys.stdout.buffer (instead of sys.stdin and sys.stdout) to use the bytes
API
- Issue #6662: Fix parsing of malformatted charref (&#bad;), patch written by
Fredrik Håård
- Issue #6268: Fix seek() method of codecs.open(), don't read or write the BOM
twice after seek(0). Fix also reset() method of codecs, UTF-16, UTF-32 and
StreamWriter classes.
- Issue #8782: Add a trailing newline in linecache.updatecache to the last line
of files without one.
- Issue #8729: Return NotImplemented from collections.Mapping.__eq__ when
comparing to a non-mapping.
- Issue #8774: tabnanny uses the encoding cookie (#coding:...) to use the
correct encoding
- Issue #7507: Quote "!" in pipes.quote(); it is special to some shells.
- Issue #8663: distutils.log emulates backslashreplace error handler. Fix
compilation in a non-ASCII directory if stdout encoding is ASCII (eg. if
stdout is not a TTY).
- Issue #1285086: Speed up urllib.parse functions: quote, quote_from_bytes,
unquote, unquote_to_bytes.
- Issue #8688: Distutils now recalculates MANIFEST everytime.
- Issue #5099: subprocess.Popen.__del__ no longer references global objects
to prevent issues during interpreter shutdown.
- Issue #8681: Make the zlib module's error messages more informative when
the zlib itself doesn't give any detailed explanation.
- Issue #8674: Fixed a number of incorrect or undefined-behaviour-inducing
overflow checks in the audioop module.
- Issue #8571: Fix an internal error when compressing or decompressing a
chunk larger than 1GB with the zlib module's compressor and decompressor
objects.
- Issue #8573: asyncore _strerror() function might throw ValueError.
- Issue #8483: asyncore.dispatcher's __getattr__ method produced confusing
error messages when accessing undefined class attributes because of the cheap
inheritance with the underlying socket object.
- Issue #7472: Fixed typo in email.encoders module; messages using ISO-2022
character sets will now consistently use a Content-Transfer-Encoding of
7bit rather than sometimes being marked as 8bit.
- Issue #4265: shutil.copyfile() was leaking file descriptors when disk fills.
Patch by Tres Seaver.
- Issue #7755: Use an unencumbered audio file for tests.
- Issue #8621: uuid.uuid4() returned the same sequence of values in the
parent and any children created using ``os.fork`` on MacOS X 10.6.
- Issue #8567: Fix precedence of signals in Decimal module: when a
Decimal operation raises multiple signals and more than one of those
signals is trapped, the specification determines the order in which
the signals should be handled. In many cases this order wasn't
being followed, leading to the wrong Python exception being raised.
- Issue #7865: The close() method of :mod:`io` objects should not swallow
exceptions raised by the implicit flush(). Also ensure that calling
close() several times is supported. Patch by Pascal Chambon.
- Issue #4687: Fix accuracy of garbage collection runtimes displayed with
gc.DEBUG_STATS.
- Issue #8354: The siginterrupt setting is now preserved for all signals,
not just SIGCHLD.
- Issue #8464: tarfile no longer creates files with execute permissions set
when mode="w|" is used.
- Issue #7834: Fix connect() of Bluetooth L2CAP sockets with recent versions
of the Linux kernel. Patch by Yaniv Aknin.
- Issue #6312: Fixed http HEAD request when the transfer encoding is chunked.
It should correctly return an empty response now.
- Issue #8549: Fix compiling the _ssl extension under AIX. Patch by
Sridhar Ratnakumar.
- Issue #8391: os.execvpe() and os.getenv() supports unicode with surrogates
and bytes strings for environment keys and values, and use
sys.getfilesystemencoding() instead of sys.getdefautltencoding()
- Issue #2302: Fix a race condition in SocketServer.BaseServer.shutdown,
where the method could block indefinitely if called just before the
event loop started running. This also fixes the occasional freezes
witnessed in test_httpservers.
- Issue #8524: When creating an SSL socket, the timeout value of the
original socket wasn't retained (instead, a socket with a positive timeout
would be turned into a non-blocking SSL socket).
- Issue #5103: SSL handshake would ignore the socket timeout and block
indefinitely if the other end didn't respond.
- The do_handshake() method of SSL objects now adjusts the blocking mode of
the SSL structure if necessary (as other methods already do).
- Issue #8108: Fix the unwrap() method of SSL objects when the socket has
a non-infinite timeout. Also make that method friendlier with applications
wanting to continue using the socket in clear-text mode, by disabling
OpenSSL's internal readahead. Thanks to Darryl Miles for guidance.
- Issue #8468: bz2.BZ2File() accepts str with surrogates and bytes filenames
- Issue #8496: make mailcap.lookup() always return a list, rather than an
iterator. Patch by Gregory Nofi.
- Issue #8195: Fix a crash in sqlite Connection.create_collation() if the
collation name contains a surrogate character.
- Issue #8484: Load all ciphers and digest algorithms when initializing
the _ssl extension, such that verification of some SSL certificates
doesn't fail because of an "unknown algorithm".
- Issue #4814: timeout parameter is now applied also for connections resulting
from PORT/EPRT commands.
- Issue #3817: ftplib.FTP.abort() method now considers 225 a valid response
code as stated in RFC-959 at chapter 5.4.
- Issue #8394: _ctypes.dlopen() accepts bytes, bytearray and str with
surrogates.
- Issue #7606: XML-RPC traceback stored in X-traceback is now encoded to ASCII
using backslashreplace error handler
- Issue #5277: Fix quote counting when parsing RFC 2231 encoded parameters.
- Issue #8383: pickle and pickletools use surrogatepass error handler when
encoding unicode as utf8 to support lone surrogates and stay compatible with
Python 2.x and 3.0
- Issue #8179: Fix macpath.realpath() on a non-existing path.
- Issue #8139: ossaudiodev didn't initialize its types properly, therefore
some methods (such as oss_mixer_device.fileno()) were not available.
Initial patch by Bertrand Janin.
- Issue #7512: shutil.copystat() could raise an OSError when the filesystem
didn't support chflags() (for example ZFS under FreeBSD). The error is
now silenced.
- Issue #3890, #8222: Fix recv() and recv_into() on non-blocking SSL sockets.
Also, enable the SSL_MODE_AUTO_RETRY flag on SSL sockets, so that blocking
reads and writes are always retried by OpenSSL itself.
- Issue #6716/2: Backslash-replace error output in compilall.
Extension Modules
-----------------
- Issue #10003: Allow handling of SIGBREAK on Windows. Fixes a regression
introduced by issue #9324.
- Issue #8734: Avoid crash in msvcrt.get_osfhandle() when an invalid file
descriptor is provided. Patch by Pascal Chambon.
- Issue #7736: Release the GIL around calls to opendir() and closedir()
in the posix module. Patch by Marcin Bachry.
- Issue #4835: make PyLong_FromSocket_t() and PyLong_AsSocket_t() private
to the socket module, and fix the width of socket descriptors to be
correctly detected under 64-bit Windows.
- Issue #665761: ``functools.reduce()`` will no longer mask exceptions
other than ``TypeError`` raised by the iterator argument.
- Issue #9570: Use PEP 383 decoding in os.mknod and os.mkfifo.
- Issue #9324: Add parameter validation to signal.signal on Windows in order
to prevent crashes.
- Issue #9526: Remove some outdated (int) casts that were preventing
the array module from working correctly with arrays of more than
2**31 elements.
- Fix memory leak in ssl._ssl._test_decode_cert.
- Issue #8065: Fix memory leak in readline module (from failure to
free the result of history_get_history_state()).
- Issue #9450: Fix memory leak in readline.replace_history_item and
readline.remove_history_item for readline version >= 5.0.
- Issue #8105: Validate file descriptor passed to mmap.mmap on Windows.
- Issue #9422: Fix memory leak when re-initializing a struct.Struct object.
- Issue #7900: The getgroups(2) system call on MacOSX behaves rather oddly
compared to other unix systems. In particular, os.getgroups() does
not reflect any changes made using os.setgroups() but basicly always
returns the same information as the id command.
os.getgroups() can now return more than 16 groups on MacOSX.
- Issue #7384: If the system readline library is linked against
ncurses, do not link the readline module against ncursesw. The
additional restriction of linking the readline and curses modules
against the same curses library is currently not enabled.
- Issue #8973: Add __all__ to struct module; this ensures that
help(struct) includes documentation for the struct.Struct class.
- Issue #2810: Fix cases where the Windows registry API returns
ERROR_MORE_DATA, requiring a re-try in order to get the complete result.
Build
-----
- Issue #10054: Some platforms provide uintptr_t in inttypes.h. Patch by
Akira Kitada.
- Issue #10055: Make json C89-compliant in UCS4 mode.
- Issue #6244: Allow detect_tkinter to look for Tcl/Tk 8.6.
- Issue #1633863: Don't ignore $CC under AIX.
- Issue #9810: Compile bzip2 source files in python's project file
directly. It used to be built with bzip2's makefile.
- Issue #941346: Improve the build process under AIX and allow Python to
be built as a shared library. Patch by Sébastien Sablé.
- Issue #4026: Make the fcntl extension build under AIX. Patch by Sébastien
Sablé.
- Issue #3101: Helper functions _add_one_to_index_C() and
_add_one_to_index_F() become _Py_add_one_to_index_C() and
_Py_add_one_to_index_F(), respectively.
- Issue #9700: define HAVE_BROKEN_POSIX_SEMAPHORES under AIX 6.x. Patch by
Sébastien Sablé.
- Issue #3928: os.mknod() now available in Solaris, also.
- Issue #6716: Quote -x arguments of compileall in MSI installer.
Exclude 2to3 tests from compileall.
- Issue #1628484: The Makefile doesn't ignore the CFLAGS environment
variable anymore. It also forwards the LDFLAGS settings to the linker
when building a shared library.
- Issue #9701: The MacOSX installer can patch the shell profile to ensure that
the "bin" directory inside the framework is on the shell's search path. This
feature now also supports the ZSH shell.
Tests
-----
- Issue #9628: fix runtests.sh -x option so more than one test can be excluded.
- Issue #9894: Do not hardcode ENOENT in test_subprocess.
- Issue #9315: Added tests for the trace module. Patch by Eli Bendersky.
- Issue #7564: Skip test_ioctl if another process is attached to /dev/tty.
- Issue #8857: Provide a test case for socket.getaddrinfo.
- Issue #8433: Fix test_curses failure with newer versions of ncurses.
- Issue #9496: Provide a test suite for the rlcompleter module. Patch by
Michele Orrù.
- Issue #9251: test_threaded_import didn't fail when run through regrtest
if the import lock was disabled.
- Issue #7449: Skip test_socketserver if threading support is disabled
- Issue #8672: Add a zlib test ensuring that an incomplete stream can be
handled by a decompressor object without errors (it returns incomplete
uncompressed data).
- Issue #8629: Disable some test_ssl tests, since they give different
results with OpenSSL 1.0.0 and higher.
- Issue #8533: regrtest uses backslashreplace error handler for stdout to avoid
UnicodeEncodeError (write non-ASCII character to stdout using ASCII encoding)
- Issue #8576: Remove use of find_unused_port() in test_smtplib and
test_multiprocessing. Patch by Paul Moore.
- Issue #8531: Skip test_ascii_formatd if ctypes module is missing
- Issue #3864: Skip three test_signal tests on freebsd6 because they fail
if any thread was previously started, most likely due to a platform bug.
- Issue #8193: Fix test_zlib failure with zlib 1.2.4.
- Issue #9568: Fix test_urllib2_localnet on OS X 10.3.
Documentation
-------------
- Issue #9817: Add expat COPYING file; add expat, libffi and expat licenses
to Doc/license.rst.
- Issue #9255: Document that the 'test' package is meant for interal Python use
only.
- Issue #7829: Document in dis that bytecode is an implementation detail.
Tools/Demos
-----------
- Issue #7287: Demo/imputil/knee.py was removed.
What's New in Python 3.1.2?
===========================
*Release date: 2010-03-20*
Core and Builtins
-----------------
- Issue #7173: Generator finalization could invalidate sys.exc_info().
Library
-------
- Issue #2698: The --compiler ignored was ignored for distutils' build_ext.
- Issue #4961: Inconsistent/wrong result of askyesno function in tkMessageBox
with Tcl/Tk-8.5.
- Issue #7356: ctypes.util: Make parsing of ldconfig output independent of
the locale.
What's New in Python 3.1.2 release candidate 1?
===============================================
*Release date: 2010-03-06*
Core and Builtins
-----------------
- Issue #7544: Preallocate thread memory before creating the thread to avoid
a fatal error in low memory condition.
- Issue #7820: The parser tokenizer restores all bytes in the right if
the BOM check fails.
- Handle errors from looking up __prepare__ correctly.
- Issue #5939: Add additional runtime checking to ensure a valid capsule
in Modules/_ctypes/callproc.c.
- Issue #7309: Fix unchecked attribute access when converting
UnicodeEncodeError, UnicodeDecodeError, and UnicodeTranslateError to
strings.
- Issue #6902: Fix problem with built-in types format incorrectly with
0 padding.
- Issue #7988: Fix default alignment to be right aligned for
complex.__format__. Now it matches other numeric types.
- Issue #7385: Fix a crash in `MemoryView_FromObject` when
`PyObject_GetBuffer` fails. Patch by Florent Xicluna.
- Issue #7788: Fix an interpreter crash produced by deleting a list
slice with very large step value.
- Issue #7561: Operations on empty bytearrays (such as `int(bytearray())`)
could crash in many places because of the PyByteArray_AS_STRING() macro
returning NULL. The macro now returns a statically allocated empty
string instead.
- Issue #7632: Fix various str -> float conversion bugs present in 2.7
alpha 2, including: (1) a serious 'wrong output' bug that could
occur for long (> 40 digit) input strings, (2) a crash in dtoa.c
that occurred in debug builds when parsing certain long numeric
strings corresponding to subnormal values, (3) a memory leak for
some values large enough to cause overflow, and (4) a number of
flaws that could lead to incorrectly rounded results.
- Issue #7604: Deleting an unset slotted attribute did not raise an
AttributeError.
- Issue #7466: segmentation fault when the garbage collector is called
in the middle of populating a tuple. Patch by Florent Xicluna.
- Issue #7419: setlocale() could crash the interpreter on Windows when called
with invalid values.
- Issue #6077: On Windows, files opened with tempfile.TemporaryFile in "wt+"
mode would appear truncated on the first '0x1a' byte (aka. Ctrl+Z).
- Issue #7085: Fix crash when importing some extensions in a thread
on MacOSX 10.6.
- Issue #7298: fixes for range and reversed(range(...)). Iteration
over range(a, b, c) incorrectly gave an empty iterator when a, b and
c fit in C long but the length of the range did not. Also fix
several cases where reversed(range(a, b, c)) gave wrong results, and
fix a refleak for reversed(range(a, b, c)) with large arguments.
- Issue #7244: itertools.izip_longest() no longer ignores exceptions
raised during the formation of an output tuple.
- Issue #3297: On wide unicode builds, do not split unicode characters into
surrogates.
- Issue #1722344: threading._shutdown() is now called in Py_Finalize(), which
fixes the problem of some exceptions being thrown at shutdown when the
interpreter is killed. Patch by Adam Olsen.
- Issue #7065: Fix a crash in bytes.maketrans and bytearray.maketrans when
using byte values greater than 127. Patch by Derk Drukker.
- Issue #7019: Raise ValueError when unmarshalling bad long data, instead
of producing internally inconsistent Python longs.
- Issue #6990: Fix threading.local subclasses leaving old state around
after a reference cycle GC which could be recycled by new locals.
- Issue #6846: Fix bug where bytearray.pop() returns negative integers.
- Issue #6750: A text file opened with io.open() could duplicate its output
when writing from multiple threads at the same time.
Library
-------
- Issue #7154: urllib.request can now detect the proxy settings on OSX 10.6
(as long as the user didn't specify 'automatic proxy configuration').
- Issue #8412: os.system() now accepts bytes, bytearray and str with
surrogates.
- Issue #4282: Fix the main function of the profile module for a non-ASCII
script, open the file in binary mode and not in text mode with the default
(utf8) encoding.
- Issue #7774: Set sys.executable to an empty string if argv[0] has been set to
an non existent program name and Python is unable to retrieve the real
program name
- Issue #6509: fix re.sub to work properly when the pattern, the string, and
the replacement were all bytes. Patch by Antoine Pitrou.
- Issue #1054943: Fix unicodedata.normalize('NFC', text) for the Public Review
Issue #29
- Issue #7494: fix a crash in _lsprof (cProfile) after clearing the profiler,
reset also the pointer to the current pointer context.
- Issue #7250: Fix info leak of os.environ across multi-run uses of
wsgiref.handlers.CGIHandler.
- Issue #1729305: Fix doctest to handle encode error with "backslashreplace".
- Issue #691291: codecs.open() should not convert end of lines on reading and
writing.
- Issue #7959: ctypes callback functions are now registered correctly
with the cycle garbage collector.
- Issue #6666: fix bug in trace.py that applied the list of directories
to be ignored only to the first file. Noted by Bogdan Opanchuk.
- Issue #7597: curses.use_env() can now be called before initscr().
Noted by Kan-Ru Chen.
- Issue #7310: fix the __repr__ of os.environ to show the environment variables.
- Issue #7970: email.Generator.flatten now correctly flattens message/rfc822
messages parsed by email.Parser.HeaderParser.
- Issue #7361: Importlib was not handling bytecode files less than 8 bytes in
length properly.
- Issue #7835: shelve should no longer produce mysterious warnings during
interpreter shutdown.
- Issue #6233: ElementTree failed converting unicode characters to XML
entities when they could't be represented in the requested output
encoding. Patch by Jerry Chen.
- Issue #4772: Raise a ValueError when an unknown Bluetooth protocol is
specified, rather than fall through to AF_PACKET (in the `socket` module).
Also, raise ValueError rather than TypeError when an unknown TIPC address
type is specified. Patch by Brian Curtin.
- Issue #6939: Fix file I/O objects in the `io` module to keep the original
file position when calling `truncate()`. It would previously change the
file position to the given argument, which goes against the tradition of
ftruncate() and other truncation APIs. Patch by Pascal Chambon.
- Issue #7792: Registering non-classes to ABCs raised an obscure error.
- Issue #7785: Don't accept bytes in FileIO.write().
- Issue #7773: Fix an UnboundLocalError in platform.linux_distribution() when
the release file is empty.
- Issue #7561: Fix crashes when using bytearray objects with the posix
module.
- Issue #1670765: Prevent email.generator.Generator from re-wrapping
headers in multipart/signed MIME parts, which fixes one of the sources of
invalid modifications to such parts by Generator.
- Issue #7701: Fix crash in binascii.b2a_uu() in debug mode when given a
1-byte argument. Patch by Victor Stinner.
- Issue #3299: Fix possible crash in the _sre module when given bad
argument values in debug mode. Patch by Victor Stinner.
- Issue #7681: Use floor division in appropiate places in the wave module.
- Issue #5372: Drop the reuse of .o files in Distutils' ccompiler (since
Extension extra options may change the output without changing the .c
file). Initial patch by Collin Winter.
- Issue #7617: Make sure distutils.unixccompiler.UnixCCompiler recognizes
gcc when it has a fully qualified configuration prefix. Initial patch
by Arfrever.
- Issue #7105: Make WeakKeyDictionary and WeakValueDictionary robust against
the destruction of weakref'ed objects while iterating.
- Issue #7455: Fix possible crash in cPickle on invalid input. Patch by
Victor Stinner.
- Issue #6511: ZipFile now raises BadZipfile (instead of an IOError) when
opening an empty or very small file.
- Issue #7556: Make sure Distutils' msvc9compile reads and writes the
MSVC XML Manifest file in text mode so string patterns can be used
in regular expressions.
- Issue #7552: Removed line feed in the base64 Authorization header in
the Distutils upload command to avoid an error when PyPI reads it.
This occurs on long passwords. Initial patch by JP St. Pierre.
- Issue #7231: urllib2 cannot handle https with proxy requiring auth. Patch by
Tatsuhiro Tsujikawa.
- Issue #4757: `zlib.compress` and other methods in the zlib module now
raise a TypeError when given an `str` object (rather than a `bytes`-like
object). Patch by Victor Stinner and Florent Xicluna.
- Issue #7349: Make methods of file objects in the io module accept None as an
argument where file-like objects (ie StringIO and BytesIO) accept them to mean
the same as passing no argument.
- Issue #5949: added check for correct lineends in input from IMAP server
in imaplib.
- Fix variations of extending deques: d.extend(d) d.extendleft(d) d+=d
- Issue #6986: Fix crash in the JSON C accelerator when called with the
wrong parameter types. Patch by Victor Stinner.
- Issue #1923: Fixed the removal of meaningful spaces when PKG-INFO is
generated in Distutils. Patch by Stephen Emslie.
- Issue #4120: Drop reference to CRT from manifest when building extensions with
msvc9compiler.
- Issue #7410: deepcopy of itertools.count was resetting the count.
- Issue #4486: When an exception has an explicit cause, do not print its
implicit context too. This affects the `traceback` module as well as
built-in exception printing.
- Issue #1488943: difflib.Differ() doesn't always add hints for tab characters
- Issue #7354: distutils.tests.test_msvc9compiler - dragfullwindows can
be 2.
- Issue #3976: pprint for sets, frozensets, and dicts now succeed when
they contain unorderable types.
- Issue #5037: Proxy the __bytes__ special method instead to __bytes__ instead
of __str__.
- Issue #7341: Close the internal file object in the TarFile constructor in
case of an error.
- Issue #7293: distutils.test_msvc9compiler is fixed to work on any fresh
Windows box. Help provided by David Bolen.
- Issue #7328: pydoc no longer corrupts sys.path when run with the '-m' switch
- Issue #7318: multiprocessing now uses a timeout when it fails to establish
a connection with another process, rather than looping endlessly. The
default timeout is 20 seconds, which should be amply sufficient for
local connections.
- Issue #7282: Fix a memory leak when an RLock was used in a thread other
than those started through `threading.Thread` (for example, using
`_thread.start_new_thread()`).
- Issue #7187: Importlib would not silence the IOError raised when trying to
write new bytecode when it was made read-only.
- Issue #7264: Fix a possible deadlock when deallocating thread-local objects
which are part of a reference cycle.
- Issue #6896: mailbox.Maildir now invalidates its internal cache each time
a modification is done through it. This fixes inconsistencies and test
failures on systems with slightly bogus mtime behaviour.
- Issue #6665: Fix fnmatch to properly match filenames with newlines in them.
- Issue #7246 & Issue #7208: getpass now properly flushes input before
reading from stdin so that existing input does not confuse it and
lead to incorrect entry or an IOError. It also properly flushes it
afterwards to avoid the terminal echoing the input afterwards on
OSes such as Solaris.
- Issue #7233: Fix a number of two-argument Decimal methods to make
sure that they accept an int or long as the second argument. Also
fix buggy handling of large arguments (those with coefficient longer
than the current precision) in shift and rotate.
- Issue #7205: Fix a possible deadlock when using a BZ2File object from
several threads at once.
- Issue #7071: byte-compilation in Distutils is now done with respect to
sys.dont_write_bytecode.
- Issue #7099: Decimal.is_normal now returns True for numbers with exponent
larger than emax.
- Issue #7080: locale.strxfrm() raises a MemoryError on 64-bit non-Windows
platforms, and assorted locale fixes by Derk Drukker.
- Issue #5833: Fix extra space character in readline completion with the
GNU readline library version 6.0.
- Issue #6894: Fixed the issue urllib2 doesn't respect "no_proxy" environment
- Issue #7082: When falling back to the MIME 'name' parameter, the
correct place to look for it is the Content-Type header.
- Make tokenize.detect_coding() normalize utf-8 and iso-8859-1 variants like the
builtin tokenizer.
- Issue #7048: Force Decimal.logb to round its result when that result
is too large to fit in the current precision.
- Issue #6236, #6348: Fix various failures in the I/O library under AIX
and other platforms, when using a non-gcc compiler. Patch by Derk Drukker.
- Issue #6954: Fixed crash when using DISTUTILS_DEBUG flag in Distutils.
- Issue #4606: Passing 'None' if ctypes argtype is set to POINTER(...)
does now always result in NULL.
- Issue #5042: Structure sub-subclass does now initialize correctly
with base class positional arguments.
- Issue #6882: Import uuid creates zombies processes.
- Issue #6635: Fix profiler printing usage message.
- Issue #6888: pdb's alias command was broken when no arguments were given.
- Issue #6795: int(Decimal('nan')) now raises ValueError instead of
returning NaN or raising InvalidContext. Also, fix infinite recursion
in long(Decimal('nan')).
- Issue #6850: Fix bug in Decimal._parse_format_specifier for formats
with no type specifier.
- Issue #6239: ctypes.c_char_p return value must return bytes.
- Issue #6838: Use a list to accumulate the value instead of
repeatedly concatenating strings in http.client's
HTTPResponse._read_chunked providing a significant speed increase
when downloading large files servend with a Transfer-Encoding of 'chunked'.
- Have importlib raise ImportError if None is found in sys.modules for a
module.
- Issue #6794: Fix Decimal.compare_total and Decimal.compare_total_mag: NaN
payloads are now ordered by integer value rather than lexicographically.
- Issue #6163: Fixed HP-UX runtime library dir options in
distutils.unixcompiler. Initial patch by Sridhar Ratnakumar and
Michael Haubenwallner.
- Issue #7066: archive_util.make_archive now restores the cwd if an error is
raised. Initial patch by Ezio Melotti.
- Issue #7481: When a threading.Thread failed to start it would leave the
instance stuck in initial state and present in threading.enumerate().
- Issue #1068268: The subprocess module now handles EINTR in internal
os.waitpid and os.read system calls where appropriate.
- Issue #9315: Fix for the trace module to record correct class name
for tracing methods.
Extension Modules
-----------------
- Issue #9277: Fix bug in struct.pack for bools in standard mode
(e.g., struct.pack('>?')): if conversion to bool raised an exception
then that exception wasn't properly propagated on machines where
char is unsigned.
- Issue #5180: Fixed a bug that prevented loading 2.x pickles in 3.x
python when they contain instances of old-style classes.
- Issue #7670: sqlite3: Fixed crashes when operating on closed connections.
- Stop providing crtassem.h symbols when compiling with Visual Studio 2010, as
msvcr100.dll is not a platform assembly anymore.
- Issue #7078: Set struct.__doc__ from _struct.__doc__.
- Issue #6848: Fix curses module build failure on OS X 10.6.
- Expat: Fix DoS via XML document with malformed UTF-8 sequences
(CVE_2009_3560).
- Issue #7999: os.setreuid() and os.setregid() would refuse to accept a -1
parameter on some platforms such as OS X.
Tests
-----
- Issue #7924: Fix an intermittent 'XXX undetected error' failure in
test_capi (only seen so far on platforms where the curses module
wasn't built), due to an uncleared exception.
- issue #7728: test_timeout was changed to use test.support.bind_port
instead of a hard coded port.
- Issue #7376: instead of running a self-test (which was failing) when called
with no arguments, doctest.py now gives a usage message.
- Issue #7498: test_multiprocessing now uses test.support.find_unused_port
instead of a hardcoded port number in test_rapid_restart.
- Issue #7431: use TESTFN in test_linecache instead of trying to create a
file in the Lib/test directory, which might be read-only for the
user running the tests.
- Issue #7324: add a sanity check to regrtest argument parsing to
catch the case of an option with no handler.
- Issue #6551: test_zipimport could import and then destroy some modules of
the encodings package, which would make other tests fail further down
the road because the internally cached encoders and decoders would point
to empty global variables.
- Issue #7295: Do not use a hardcoded file name in test_tarfile.
- Issue #7270: Add some dedicated unit tests for multi-thread synchronization
primitives such as Lock, RLock, Condition, Event and Semaphore.
- Issue #7248 (part 2): Use a unique temporary directory for importlib source
tests instead of tempfile.tempdir. This prevents the tests from sharing state
between concurrent executions on the same system.
- Issue #7248: In importlib.test.source.util a try/finally block did not make
sure that some referenced objects actually were created in the block before
calling methods on the object.
- Issue #7055: test___all__ now greedily detects all modules which have an
__all__ attribute, rather than using a hardcoded and incomplete list.
- Issue #7058: Added save/restore for argv and os.environ to runtest_inner
in regrtest, with warnings if the called test modifies them.
- Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.
C-API
-----
- Make PyUnicode_CompareWithASCIIString return not equal if the Python string
has '\0' at the end.
- Issue #7414: 'C' code wasn't being skipped properly (for keyword arguments)
in PyArg_ParseTupleAndKeywords.
Build
-----
- Issue #9280: Make sharedinstall depend on sharedmods.
- Issue #8854: Fix finding Visual Studio 2008 on Windows x64.
- Issue #3920, #7903: Define _BSD_SOURCE on OpenBSD 4.4 through 4.9.
- Issue #7632: When Py_USING_MEMORY_DEBUGGER is defined, disable the
private memory allocation scheme in dtoa.c and use PyMem_Malloc and
PyMem_Free instead. Also disable caching of powers of 5.
- Switch to OpenSSL 0.9.8l on Windows.
- Issue #6603: Change READ_TIMESTAMP macro in ceval.c so that it
compiles correctly under gcc on x86-64. This fixes a reported
problem with the --with-tsc build on x86-64.
- Issue #6802: Fix build issues on MacOSX 10.6
- Issue #6801 : symmetric_difference_update also accepts |.
Thanks to Carl Chenet.
- Issue #7541: when using ``python-config`` with a framework install the
compiler might use the wrong library.
- Issue #6491: Allow --with-dbmliborder to specify that no dbms will be built.
- Issue #7589: Only build the nis module when the correct header files are
found.
Documentation
-------------
- Updating `Using Python` documentation to include description of CPython's
-J and -X options.
- Issue #6556: Fixed the Distutils configuration files location explanation
for Windows.
- Update python manual page (options -B, -O0, -s, environment variables
PYTHONDONTWRITEBYTECODE, PYTHONNOUSERSITE).
- Issue #8909: Added the size of the bitmap used in the installer created by
distutils' bdist_wininst. Patch by Anatoly Techtonik.
What's New in Python 3.1.1?
===========================
*Release date: 2009-08-13*
Core and Builtins
-----------------
- Issue #6707: dir() on an uninitialized module caused a crash.
- Issue #6540: Fixed crash for bytearray.translate() with invalid parameters.
- Issue #6573: set.union() stopped processing inputs if an instance of self
occurred in the argument chain.
- Issue #6070: On posix platforms import no longer copies the execute bit
from the .py file to the .pyc file if it is set.
- Issue #6428: Since Python 3.0, the __bool__ method must return a bool
object, and not an int. Fix the corresponding error message, and the
documentation.
- Issue #6347: Include inttypes.h as well as stdint.h in pyport.h.
This fixes a build failure on HP-UX: int32_t and uint32_t are
defined in inttypes.h instead of stdint.h on that platform.
- Issue #6373: Fixed a SystemError when encoding with the latin-1 codec and
the 'surrogateescape' error handler, a string which contains unpaired
surrogates.
C-API
-----
- Issue #6624: yArg_ParseTuple with "s" format when parsing argument with
NUL: Bogus TypeError detail string.
- Issue #6405: Remove duplicate type declarations in descrobject.h.
- The code flags for old __future__ features are now available again.
Library
-------
- Issue #6106: telnetlib.Telnet.process_rawq doesn't handle default WILL/WONT
DO/DONT correctly.
- Issue #6126: Fixed pdb command-line usage.
- Issue #6629: Fix a data corruption issue in the new I/O library, which could
occur when writing to a BufferedRandom object (e.g. a file opened in "rb+" or
"wb+" mode) after having buffered a certain amount of data for reading. This
bug was not present in the pure Python implementation.
- Issue #6622: Fix "local variable 'secret' referenced before
assignment" bug in POP3.apop.
- Issue #6637: defaultdict.copy() did not work when the default factory
was left unspecified. Also, the eval/repr round-trip would fail when
the default_factory was None.
- Issue #2715: Remove remnants of Carbon.File from binhex module.
- Issue #6595: The Decimal constructor now allows arbitrary Unicode
decimal digits in input, as recommended by the standard. Previously
it was restricted to accepting [0-9].
- Issues #5155, #5313, #5331: multiprocessing.Process._bootstrap was
unconditionally calling "os.close(sys.stdin.fileno())" resulting in file
descriptor errors
- Issue #1424152: Fix for http.client, urllib.request to support SSL while
working through proxy. Original patch by Christopher Li, changes made by
Senthil Kumaran
- importlib.abc.PyLoader did not inherit from importlib.abc.ResourceLoader like
the documentation said it did even though the code in PyLoader relied on the
abstract method required by ResourceLoader.
- Issue #6431: Make Fraction type return NotImplemented when it doesn't
know how to handle a comparison without loss of precision. Also add
correct handling of infinities and nans for comparisons with float.
- Issue #6415: Fixed warnings.warn segfault on bad formatted string.
- Issue #6358: The exit status of a command started with os.popen() was
reported differently than it did with python 2.x.
- Issue #6323: The pdb debugger did not exit when running a script with a
syntax error.
- Issue #3392: The subprocess communicate() method no longer fails in select()
when file descriptors are large; communicate() now uses poll() when possible.
- Issue #6369: Fix an RLE decompression bug in the binhex module.
- Issue #6344: Fixed a crash of mmap.read() when passed a negative argument.
- Issue #4005: Fixed a crash of pydoc when there was a zip file present in
sys.path.
Extension Modules
-----------------
- Fix a segfault in expat.
- Issue #4509: array.array objects are no longer modified after an operation
failing due to the resize restriction in-place when the object has exported
buffers.
Build
-----
- Issue #4601: 'make install' did not set the appropriate permissions on
directories.
- Issue #5390: Add uninstall icon independent of whether file
extensions are installed.
Test
----
- Fix a test in importlib.test.source.test_abc_loader that was incorrectly
testing when a .pyc file lacked an code object bytecode.
What's New in Python 3.1?
=========================
*Release date: 27-June-2009*
Core and Builtins
-----------------
- Issue #6334: Fix bug in range length calculation for ranges with
large arguments.
- Issue #6329: Fixed iteration for memoryview objects (it was being blocked
because it wasn't recognized as a sequence).
Library
-------
- Issue #6314: logging.basicConfig() performs extra checks on the "level"
argument.
- Issue #6274: Fixed possible file descriptors leak in subprocess.py
- Accessing io.StringIO.buffer now raises an AttributeError instead of
io.UnsupportedOperation.
- Issue #6271: mmap tried to close invalid file handle (-1) when anonymous.
(On Unix)
- Issue #1202: zipfile module would cause a struct.error when attempting to
store files with a CRC32 > 2**31-1.
Extension Modules
-----------------
- Issue #5590: Remove unused global variable in pyexpat extension.
What's New in Python 3.1 Release Candidate 2?
=============================================
*Release date: 13-June-2009*
Core and Builtins
-----------------
- Fixed SystemError triggered by "range([], 1, -1)".
- Issue #5924: On Windows, a large PYTHONPATH environment variable
(more than 255 characters) would be completely ignored.
- Issue #4547: When debugging a very large function, it was not always
possible to update the lineno attribute of the current frame.
- Issue #5330: C functions called with keyword arguments were not reported by
the various profiling modules (profile, cProfile). Patch by Hagen Fürstenau.
Library
-------
- Issue #6438: Fixed distutils.cygwinccompiler.get_versions : the regular
expression string pattern was trying to match against a bytes returned by
Popen. Tested under win32 to build the py-postgresql project.
- Issue #6258: Support AMD64 in bdist_msi.
- Issue #6195: fixed doctest to no longer try to read 'source' data from
binary files.
- Issue #5262: Fixed bug in next rollover time computation in
TimedRotatingFileHandler.
- Issue #6217: The C implementation of io.TextIOWrapper didn't include the
errors property. Additionally, the errors and encoding properties of StringIO
are always None now.
- Issue #6137: The pickle module now translates module names when loading
or dumping pickles with a 2.x-compatible protocol, in order to make data
sharing and migration easier. This behaviour can be disabled using the
new `fix_imports` optional argument.
- Removed the ipaddr module.
- Issue #3613: base64.{encode,decode}string are now called
base64.{encode,decode}bytes which reflects what type they accept and return.
The old names are still there as deprecated aliases.
- Issue #5767: Remove sgmlop support from xmlrpc.client.
- Issue #6150: Fix test_unicode on wide-unicode builds.
- Issue #6149: Fix initialization of WeakValueDictionary objects from non-empty
parameters.
Windows
-------
- Issue #6221: Delete test registry key before running the test.
- Issue #6158: Package Sine-1000Hz-300ms.aif in MSI file.
C-API
-----
- Issue #5735: Python compiled with --with-pydebug should throw an
ImportError when trying to import modules compiled without
--with-pydebug, and vice-versa.
Build
-----
- Issue #6154: Make sure the intl library is added to LIBS if needed. Also
added LIBS to OS X framework builds.
- Issue #5809: Specifying both --enable-framework and --enable-shared is
an error. Configure now explicity tells you about this.
What's New in Python 3.1 release candidate 1?
=============================================
*Release date: 2009-05-30*
Core and Builtins
-----------------
- Issue #6097: Escape UTF-8 surrogates resulting from mbstocs conversion
of the command line.
- Issue #6012: Add cleanup support to O& argument parsing.
- Issue #6089: Fixed str.format with certain invalid field specifiers
that would raise SystemError.
- Issue #5982: staticmethod and classmethod now expose the wrapped
function with __func__.
- Added support for multiple context managers in the same with-statement.
Deprecated contextlib.nested() which is no longer needed.
- Issue #5829: complex("1e500") no longer raises OverflowError. This
makes it consistent with float("1e500") and interpretation of real
and imaginary literals.
- Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.
- Issue #5994: the marshal module now has docstrings.
- Issue #5981: Fix three minor inf/nan issues in float.fromhex:
(1) inf and nan strings with trailing whitespace were incorrectly
rejected; (2) parsing of strings representing infinities and nans
was locale aware; and (3) the interpretation of fromhex('-nan')
didn't match that of float('-nan').
Library
-------
- Issue #4859: Implement PEP 383 for pwd, spwd, and grp.
- smtplib 'login' and 'cram-md5' login are also fixed (see Issue #5259).
- Issue #6121: pydoc now ignores leading and trailing spaces in the
argument to the 'help' function.
- Issue #6118: urllib.parse.quote_plus ignored the encoding and errors
arguments for strings with a space in them.
- collections.namedtuple() was not working with the following field
names: cls, self, tuple, itemgetter, and property.
- In unittest, using a skipping decorator on a class is now equivalent to
skipping every test on the class. The ClassTestSuite class has been removed.
- Issue #6050: Don't fail extracting a directory from a zipfile if
the directory already exists.
- Issue #1309352: fcntl now converts its third arguments to a C `long` rather
than an int, which makes some operations possible under 64-bit Linux (e.g.
DN_MULTISHOT with F_NOTIFY).
- Issue #5761: Add the name of the underlying file to the repr() of various
IO objects.
- Issue #5259: smtplib plain auth login no longer gives a traceback. Fix
by Musashi Tamura, tests by Marcin Bachry.
- Issue #1983: Fix functions taking or returning a process identifier to use
the dedicated C type ``pid_t`` instead of a C ``int``. Some platforms have
a process identifier type wider than the standard C integer type.
- Issue #4066: smtplib.SMTP_SSL._get_socket now correctly returns the socket.
Patch by Farhan Ahmad, test by Marcin Bachry.
- Issue #2116: Weak references and weak dictionaries now support copy()ing and
deepcopy()ing.
- Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.
- Issue #5918: Fix a crash in the parser module.
- Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.
- Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
library. This means, for example, that opening an UTF-16 text file in
append mode doesn't add a BOM at the end of the file if the file isn't
empty.
- Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
file is a binary. Patch by Brodie Rao, tests by Daniel Diniz. This fix
corrects a pydoc regression.
- Issue #5955: aifc's close method did not close the file it wrapped,
now it does. This also means getfp method now returns the real fp.
Installation
------------
- Issue #6047: fullinstall has been removed because Python 3's executable will
now be known as python3.
- Lib/smtpd.py is no longer installed as a script.
Extension Modules
-----------------
- Issue #3061: Use wcsftime for time.strftime where available.
- Issue #4873: Fix resource leaks in error cases of pwd and grp.
- Issue #6093: Fix off-by-one error in locale.strxfrm.
- The _functools and _locale modules are now built into the libpython shared
library instead of as extension modules.
Build
-----
- Issue #3585: Add pkg-config support. It creates a python-2.7.pc file
and a python3.pc symlink in the $(LIBDIR)/pkgconfig directory. Patch by
Clinton Roy.
Tests
-----
- Issue #5442: Tests for importlib were not properly skipping case-sensitivity
tests on darwin even when the OS was installed on a case-sensitive
filesystem. Also fixed tests that should not be run when
sys.dont_write_bytecode is true.
What's New in Python 3.1 beta 1?
================================
*Release date: 2009-05-06*
Core and Builtins
-----------------
- Issue #5914: Add new C API function PyOS_string_to_double, and
deprecate PyOS_ascii_strtod and PyOS_ascii_atof.
- Issue #3382: float.__format__, complex.__format__, and %-formatting
no longer map 'F' to 'f'. Because of issue #5859 (below), this only
affects nan -> NAN and inf -> INF.
- Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
in all operations, including splitdrive, split, etc. splitunc() now issues
a PendingDeprecation warning.
- Issue #5920: For float.__format__, change the behavior with the
empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
to be like 'g' but with at least one decimal point and with a
default precision of 12. Previously, the behavior the same but with
a default precision of 6. This more closely matches str(), and
reduces surprises when adding alignment flags to the empty
presentation type. This also affects the new complex.__format__ in
the same way.
- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.
- Issue #5890: in subclasses of 'property' the __doc__ attribute was
shadowed by classtype's, even if it was None. property now
inserts the __doc__ into the subclass instance __dict__.
- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
sequences. Patch by Nick Barnes and Victor Stinner.
- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
- Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
received a new method, detach(). detach() disconnects the underlying stream
from the buffer or text IO and returns it.
- Issue #5859: Remove switch from '%f' to '%g'-style formatting for
floats with absolute value over 1e50. Also remove length
restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
12.34 no longer raise an exception.
- Issue #1588: Add complex.__format__. For example,
format(complex(1, 2./3), '.5') now produces a sensible result.
- Issue #5864: Fix empty format code formatting for floats so that it
never gives more than the requested number of significant digits.
- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.
- Issue #5835: Deprecate PyOS_ascii_formatd.
- Issue #4971: Fix titlecase for characters that are their own
titlecase, but not their own uppercase.
- Issue #5283: Setting __class__ in __del__ caused a segfault.
- Issue #5816: complex(repr(z)) now recovers z exactly, even when
z involves nans, infs or negative zeros.
- Issue #3166: Make int -> float conversions correctly rounded.
- Issue #1869 (and many duplicates): make round(x, n) correctly
rounded for a float x, by using the decimal <-> binary conversions
from Python/dtoa.c. As a consequence, (e.g.) round(x, 2) now
consistently agrees with format(x, '.2f').
- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
some builtin types.
- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.
- Issue #5515: str.format() type 'n' combined with commas and leading
zeros no longer gives odd results with ints and floats.
- Implement PEP 378, Format Specifier for Thousands Separator, for
floats.
- The str function switches to exponential notation at
1e11, not 1e12. This avoids printing 13 significant digits in
situations where only 12 of them are correct. Example problem
value: str(1e11 + 0.5). (This minor issue has existed in 2.x for a
long time.)
- Issue #1580: On most platforms, use a 'short' float repr: for a
finite float x, repr(x) now outputs a string based on the shortest
sequence of decimal digits that rounds to x. Previous behaviour was
to output 17 significant digits and then strip trailing zeros.
Another minor difference is that the new repr switches to
exponential notation at 1e16 instead of the previous 1e17; this
avoids misleading output in some cases.
There's a new sys attribute sys.float_repr_style, which takes
the value 'short' to indicate that we're using short float repr,
and 'legacy' if the short float repr isn't available for one
reason or another.
The float repr change involves incorporating David Gay's 'perfect
rounding' code into the Python core (it's in Python/dtoa.c). As a
secondary consequence, all string-to-float and float-to-string
conversions (including all float formatting operations) will be
correctly rounded on these platforms.
See issue #1580 discussions for details of platforms for which
this change does not apply.
- Issue #5759: float() didn't call __float__ on str subclasses.
- The string.maketrans() function is deprecated; there is a new static method
maketrans() on the bytes and bytearray classes. This removes confusion about
the types string.maketrans() is supposed to work with, and mirrors the
methods available on the str class.
- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
its clarity and its speed.
- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
to avoid compiler warnings.
- Issue #3739: The unicode-internal encoder now reports the number of characters
consumed like any other encoder (instead of the number of bytes).
Installation
------------
- Issue #5756: Install idle and pydoc with a 3 suffix.
Library
-------
- Issue #5311: bdist_msi can now build packages that do not depend on a
specific Python version.
- Issue #5150: IDLE's format menu now has an option to strip trailing
whitespace.
- Issue #5940: distutils.command.build_clib.check_library_list was not doing
the right type checkings anymore.
- Issue #4875: On win32, ctypes.util.find_library does no longer
return directories.
- Issue #5142: Add the ability to skip modules while stepping to pdb.
- Issue #1309567: Fix linecache behavior of stripping subdirectories when
looking for files given by a relative filename.
- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
turtle demos in Demo/turtle.
- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
extracting a file to the root directory.
- Issue #5913: os.listdir() should fail for empty path on windows.
- Issue #5084: unpickling now interns the attribute names of pickled objects,
saving memory and avoiding growth in size of subsequent pickles. Proposal
and original patch by Jake McGuire.
- The json module now works exclusively with str and not bytes.
- Issue #3959: The ipaddr module has been added to the standard library.
Contributed by Google.
- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
error when a named pipe is encountered, rather than blocking infinitely.
- Issue #5857: tokenize.tokenize() now returns named tuples.
- Issue #4305: ctypes should now build again on mipsel-linux-gnu
- Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
string is already in normalized form, by performing a quick check beforehand.
Original patch by Rauli Ruohonen.
- Issue #5853: calling a function of the mimetypes module from several threads
at once could hit the recursion limit if the mimetypes database hadn't been
initialized before.
- Issue #5854: Updated __all__ to include some missing names and remove some
names which should not be exported.
- Issue #3102: All global symbols that the _ctypes extension defines
are now prefixed with 'Py' or '_ctypes'.
- Issue #5041: ctypes does now allow pickling wide character.
- Issue #5812: For the two-argument form of the Fraction constructor,
Fraction(m, n), m and n are permitted to be arbitrary Rational
instances.
- Issue #5812: Fraction('1e6') is valid: more generally, any string
that's valid for float() is now valid for Fraction(), with the
exception of strings representing NaNs and infinities.
- Issue #5734: BufferedRWPair was poorly tested and had several glaring
bugs. Patch by Brian Quinlan.
- Issue #1161031: fix readwrite select flag handling: POLLPRI now
results in a handle_expt_event call, not handle_read_event, and POLLERR
and POLLNVAL now call handle_close, not handle_expt_event. Also,
dispatcher now has an 'ignore_log_types' attribute for suppressing
log messages, which is set to 'warning' by default.
- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
new arguments introduced in 2.5.
- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
makeunicodedata.py and regenerated the Unicode database (This fixes
u'\u1d79'.lower() == '\x00').
Extension Modules
-----------------
- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
pwd.
- Issue #5463: In struct module, remove deprecated float coercion
for integer type codes: struct.pack('L', 0.3) should now raise
an error. The _PY_STRUCT_FLOAT_COERCE constant has been removed.
The version number has been bumped to 0.3.
- Issue #5359: Readd the Berkeley DB detection code to allow _dbm be built
using Berkeley DB.
Tests
-----
- Issue #5354: New test support function import_fresh_module() makes
it easy to import both normal and optimised versions of modules.
test_heapq and test_warnings have been adjusted to use it, tests for
other modules with both C and Python implementations in the stdlib
can be adjusted to use it over time.
- Issue #5837: Certain sequences of calls to set() and unset() for
support.EnvironmentVarGuard objects restored the environment variables
incorrectly on __exit__.
C-API
-----
- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.
What's New in Python 3.1 alpha 2?
=================================
*Release date: 2009-4-4*
Core and Builtins
-----------------
- Implement PEP 378, Format Specifier for Thousands Separator, for
integers.
- Issue #5666: Py_BuildValue's 'c' code should create byte strings.
- Issue #5499: The 'c' code for argument parsing functions now only accepts a
byte, and the 'C' code only accepts a unicode character.
- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
when hitting the recursion limit under certain circumstances.
- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.
- Fix a segfault when running test_exceptions with coverage, caused by
insufficient checks in accessors of Exception.__context__.
- Issue #5604: non-ASCII characters in module name passed to
imp.find_module() were converted to UTF-8 while the path is
converted to the default filesystem encoding, causing nonsense.
- Issue #5126: str.isprintable() returned False for space characters.
- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
the end sys.path, for compatibility with the system install of Python.
- Issue #4688: Add a heuristic so that tuples and dicts containing only
untrackable objects are not tracked by the garbage collector. This can
reduce the size of collections and therefore the garbage collection overhead
on long-running programs, depending on their particular use of datatypes.
- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
improve its performance. Long divisions and remainder operations
are now between 50% and 150% faster.
- Issue #4258: Make it possible to use base 2**30 instead of base
2**15 for the internal representation of integers, for performance
reasons. Base 2**30 is enabled by default on 64-bit machines. Add
--enable-big-digits option to configure, which overrides the
default. Add sys.int_info structseq to provide information about
the internal format.
- Issue #4474: PyUnicode_FromWideChar now converts characters outside
the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
and sizeof(Py_UNICODE) == 2.
- Issue #5237: Allow auto-numbered fields in str.format(). For
example: '{} {}'.format(1, 2) == '1 2'.
- Issue #5392: when a very low recursion limit was set, the interpreter would
abort with a fatal error after the recursion limit was hit twice.
- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
short file names.
Library
-------
- Issue #2625: added missing items() call to the for loop in
mailbox.MH.get_message().
- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
error substitutions from non-strict codec error callbacks in
incrementalencoder and StreamWriter.
- Issue #5656: Fix the coverage reporting when running the test suite with
the -T argument.
- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
- Issue #5624: Fix the _winreg module name still used in several modules.
- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.
- Issue #5619: Multiprocessing children disobey the debug flag and causes
popups on windows buildbots. Patch applied to work around this issue.
- Issue #5400: Added patch for multiprocessing on netbsd compilation/support
- Issue #5387: Fixed mmap.move crash by integer overflow.
- Issue #5261: Patch multiprocessing's semaphore.c to support context
manager use: "with multiprocessing.Lock()" works now.
- Issue #5236: Change time.strptime() to only take strings. Didn't work with
bytes already but the failure was non-obvious.
- Issue #5177: Multiprocessing's SocketListener class now uses
socket.SO_REUSEADDR on all connections so that the user no longer needs
to wait 120 seconds for the socket to expire.
- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().
- Issue #1174606: Calling read() without arguments of an unbounded file
(typically /dev/zero under Unix) could crash the interpreter.
- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
io.BufferedRandom have been deprecated for removal in Python 3.2.
- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
forever on incomplete input. That caused tarfile.open() to hang when used
with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
partial bzip2 compressed data.
- Issue #2110: Add support for thousands separator and 'n' type
specifier to Decimal.__format__
- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
'>' alignment characters.
- The error detection code in FileIO.close() could fail to reflect the `errno`
value, and report it as -1 instead.
- Issue #5016: FileIO.seekable() could return False if the file position
was negative when truncated to a C int. Patch by Victor Stinner.
Extension Modules
-----------------
- Issue #5391: mmap now deals exclusively with bytes.
- Issue #5463: In struct module, remove deprecated overflow wrapping
when packing an integer: struct.pack('=L', -1) now raises
struct.error instead of returning b'\xff\xff\xff\xff'. The
_PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
have been removed from the struct module.
What's New in Python 3.1 alpha 1
================================
*Release date: 2009-03-07*
Core and Builtins
-----------------
- The io module has been reimplemented in C for speed.
- Give dict views an informative __repr__.
- Issue #5247: Improve error message when unknown format codes are
used when using str.format() with str, int, and float arguments.
- Issue #5249: time.strftime returned malformed string when format string
contained non ascii character on windows.
- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
source has already been decoded into str.
- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
rotating the object pointer by 4 bits to the right.
- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
it now forces its argument to double before testing for infinity.
- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
returns a non-number type.
- Issue #5182: Removed memoryview.__str__.
- Issue #1717: Removed builtin cmp() function, dropped tp_compare
slot, the C API functions PyObject_Compare and PyUnicode_Compare and
the type definition cmpfunc. The tp_compare slot has been renamed
to tp_reserved, and is reserved for future usage.
- Issue #1242657: the __len__() and __length_hint__() calls in several tools
were suppressing all exceptions. These include list() and bytearray().
- Issue #4707: round(x, n) now returns an integer if x is an integer.
Previously it returned a float.
- Issue #4753: By enabling a configure option named '--with-computed-gotos'
on compilers that support it (notably: gcc, SunPro, icc), the bytecode
evaluation loop is compiled with a new dispatch mechanism which gives
speedups of up to 20%, depending on the system, on various benchmarks.
- Issue #4874: Most builtin decoders now reject unicode input.
- Issue #4842: Don't allow trailing 'L' when constructing an integer
from a string.
- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.
- Issue #4838: When a module is deallocated, free the memory backing the
optional module state data.
- Issue #4910: Rename nb_long slot to nb_reserved, and change its
type to (void *).
- Issue #4935: The overflow checking code in the expandtabs() method common
to str, bytes and bytearray could be optimized away by the compiler, letting
the interpreter segfault instead of raising an error.
- Issue #3720: Fix a crash when an iterator modifies its class and removes its
__next__ method.
- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
function no longer attempt to call the __long__ slot to convert an object
to an integer. Only the __int__ and __trunc__ slots are examined.
- Issue #4893: Use NT threading on CE.
- Issue #4915: Port sysmodule to Windows CE.
- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
common cases are optimized thanks to a dedicated fast path and a moderate
amount of loop unrolling.
- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
collecting the oldest generation) so that allocating lots of objects without
destroying them does not show quadratic performance. Based on a proposal by
Martin von Löwis at
http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
- Issue #4604: Some objects of the I/O library could still be used after
having been closed (for instance, a read() call could return some
previously buffered data). Patch by Dmitry Vasiliev.
- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
flag to work properly. Furthermore, when specifying -u, the text stdout
and stderr streams have line-by-line buffering enabled (the default being
to buffer arbitrary chunks of data).
- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
instead of ints (reducing its size from 4 to 8 times thereby reducing
Python's overall memory).
- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
an existing .py counterpart, override the co_filename attributes of all
code objects if the original filename is obsolete (which can happen if the
file has been renamed, moved, or if it is accessed through different paths).
Patch by Ziga Seilnacht and Jean-Paul Calderone.
- Issue #4580: Fix slicing of memoryviews when the item size is greater than
one byte. Also fixes the meaning of len() so that it returns the number of
items, rather than the size in bytes.
- Issue #4075: Use OutputDebugStringW in Py_FatalError.
- Issue #4747: When the terminal does not use utf-8, executing a script with
non-ascii characters in its name could fail with a "SyntaxError: None" error.
- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
file with `bytes' filename on Windows.
- Issue #3680: Reference cycles created through a dict, set or deque iterator
did not get collected.
- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
where the tp_hash and tp_dict slots are both NULL.
- Issue #4759: None is now allowed as the first argument of
bytearray.translate(). It was always allowed for bytes.translate().
- Added test case to ensure attempts to read from a file opened for writing
fail.
- Issue #3106: Speedup some comparisons (str/str and int/int).
- Issue #2183: Simplify and optimize bytecode for list, dict and set
comprehensions. Original patch for list comprehensions by Neal Norwitz.
- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
print elapsed times, not only when some objects are uncollectable /
unreachable. Original patch by Neil Schemenauer.
- Issue #3439: Add a bit_length method to int.
- Issue #2173: When getting device encoding, check that return value of
nl_langinfo is not the empty string. This was causing silent build
failures on OS X.
- Issue #4597: Fixed several opcodes that weren't always propagating
exceptions.
- Issue #4589: Fixed exception handling when the __exit__ function of a
context manager returns a value that cannot be converted to a bool.
- Issue #4445: Replace "sizeof(PyBytesObject)" with
"offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
bytes instances. On a typical machine this saves 3 bytes of memory
(on average) per allocation of a bytes instance.
- Issue #4533: File read operation was dreadfully slow due to a slowly
growing read buffer. Fixed by using the same growth rate algorithm as
Python 2.x.
- Issue #4509: Various issues surrounding resize of bytearray objects to
which there are buffer exports (e.g. memoryview instances).
- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
method on file objects with closefd=False. The file descriptor is still
kept open but the file object behaves like a closed file. The ``FileIO``
object also got a new readonly attribute ``closefd``.
- Issue #4569: Interpreter crash when mutating a memoryview with an item size
larger than 1.
- Issue #4748: Lambda generators no longer return a value.
- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
- Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
PyUnicode_DecodeUTF8() once, remember the result and output it in a second
step. This avoids problems with counting UTF-8 bytes that ignores the effect
of using the replace error handler in PyUnicode_DecodeUTF8().
Library
-------
- Issue #6545: Removed assert statements in distutils.Extension, so the
behavior is similar when used with -O.
- Issue #6459: distutils.command.build_ext.get_export_symbols now uses the
"PyInit" prefix, rather than "init".
- Issue #6433: fixed issues with multiprocessing.pool.map hanging on empty list
- Issue #6455: Fixed test_build_ext under win32.
- Issue #6413: Fixed the log level in distutils.dist for announce.
- Issue #6403: Fixed package path usage in build_ext.
- Issue #6365: Distutils build_ext inplace mode was copying the compiled
extension in a subdirectory if the extension name had dots.
- Issue #6287: Added the license field in Distutils documentation.
- Issue #6263: Fixed syntax error in distutils.cygwincompiler.
- Issue #5201: distutils.sysconfig.parse_makefile() now understands `$$`
in Makefiles. This prevents compile errors when using syntax like:
`LDFLAGS='-rpath=\$$LIB:/some/other/path'`. Patch by Floris Bruynooghe.
- Issue #6131: test_modulefinder leaked when run after test_distutils.
Patch by Hirokazu Yamamoto.
- Issue #6048: Now Distutils uses the tarfile module in archive_util.
- Issue #6062: In distutils, fixed the package option of build_ext. Feedback
and tests on pywin32 by Tim Golden.
- Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.
- Issue #6046: Fixed the library extension when distutils build_ext is used
inplace. Initial patch by Roumen Petrov.
- Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
subcommand.
- Issue #6022: a test file was created in the current working directory by
test_get_outputs in Distutils.
- Issue #5977: distutils build_ext.get_outputs was not taking into account the
inplace option. Initial patch by kxroberto.
- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
for old-style extensions.
- Issue #5976: Fixed Distutils test_check_environ.
- Issue #5941: Distutils build_clib command was not working anymore because
of an incomplete costumization of the archiver command. Added ARFLAGS in the
Makefile besides AR and make Distutils use it. Original patch by David
Cournapeau.
- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.
- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
anymore.
- Issue #5810: Fixed Distutils test_build_scripts so it uses
sysconfig.get_config_vars.
- Issue #4951: Fixed failure in test_httpservers.
- Issue #5795: Fixed test_distutils failure on Debian ppc.
- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.
- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
a value in SafeConfigParser.
- Issue #5732: added a new command in Distutils: check.
- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
platforms. Initial patch by Paul Moore.
- Issue #5095: Added bdist_msi to the list of bdist supported formats.
Initial fix by Steven Bethard.
- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
Initial fix by Wayne Davison.
- Issue #5694: removed spurious test output in Distutils (test_clean).
- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
- Issue #1665206 (partially): Move imports in cgitb to the top of the module
instead of performing them in functions. Helps prevent import deadlocking in
threads.
- Issue #2522: locale.format now checks its first argument to ensure it has
been passed only one pattern, avoiding mysterious errors where it appeared
that it was failing to do localization.
- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
Brandl.
- Issue #1222: locale.format() bug when the thousands separator is a space
character.
- Issue #5472: Fixed distutils.test_util tear down. Original patch by
Tim Golden.
- collections.deque() objects now have a read-only attribute called maxlen.
- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
it is has been populated and properly configured in order to prevent
window flashing.
- Issue #4792: Prevent a segfault in _tkinter by using the
guaranteed to be safe interp argument given to the PythonCmd in place of
the Tcl interpreter taken from a PythonCmd_ClientData.
- Issue #5193: Guarantee that tkinter.Text.search returns a string.
- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
Original patch by Akira Kitada.
- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.
- Issue #5385: Fixed mmap crash after resize failure on windows.
- Issue #5179: Fixed subprocess handle leak on failure on windows.
- PEP 372: Added collections.OrderedDict().
- The _asdict() for method for namedtuples now returns an OrderedDict().
- configparser now defaults to using an ordered dictionary.
- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
import guess_extension`` was used.
- Issue #1733986: Fixed mmap crash in accessing elements of second map object
with same tagname but larger size than first map. (Windows)
- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
overrun.
- Issue #1533164: Installed but not listed *.pyo was breaking Distutils
bdist_rpm command.
- Issue #5378: added --quiet option to Distutils bdist_rpm command.
- Issue #5052: make Distutils compatible with 2.3 again.
- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
in Distutils tests.
- Issue #5287: Add exception handling around findCaller() call to help out
IronPython.
- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
The file was resized to wrong size.
- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
- Issue #2279: distutils.sdist.add_defaults now add files
from the package_data and the data_files metadata.
- Issue #5257: refactored all tests in distutils, so they use
support.TempdirManager, to avoid writing in the tests directory.
- Issue #4524: distutils build_script command failed with --with-suffix=3.
Initial patch by Amaury Forgeot d'Arc.
- Issue #2461: added tests for distutils.util
- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
which inherited from numbers.py which did not have __slots__ defined. The
numbers hierarchy now has its own __slots__ declarations.
- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
encoding.
- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
under NT and OS2. Patch by Philip Jenvey.
- Issue #5128: Make compileall properly inspect bytecode to determine if needs
to be recreated. This avoids a timing hole thanks to the old reliance on the
ctime of the files involved.
- Issue #5122: Synchronize tk load failure check to prevent a potential
deadlock.
- Issue #1818: collections.namedtuple() now supports a keyword argument
'rename' which lets invalid fieldnames be automatically converted to
positional names in the form, _1, _2, ...
- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
public documented method ``ZipImporter.get_filename()``.
- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
the execution of packages by looking for and executing a ``__main__``
submodule when a package name is supplied. Initial patch by Andi
Vajda.
- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
Tkapp_Call when calling from a thread different than the one that created
the Tcl interpreter. Patch by Robert Hancock.
- Issue #4285: Change sys.version_info to be a named tuple. Patch by
Ross Light.
- Issue #1520877: Now distutils.sysconfig reads $AR from the
environment/Makefile. Patch by Douglas Greiman.
- Issue #1276768: The verbose option was not used in the code of
distutils.file_util and distutils.dir_util.
- Issue #5132: Fixed trouble building extensions under Solaris with
--enabled-shared activated. Initial patch by Dave Peterson.
- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
- The shelve module now defaults to pickle protocol 3.
- Fix a bug in the trace module where a bytes object from co_lnotab had its
items being passed through ord().
- Issue #2047: shutil.move() could believe that its destination path was
inside its source path if it began with the same letters (e.g. "src" vs.
"src.new").
- Added the ttk module. See issue #2983: Ttk support for Tkinter.
- Removed isSequenceType(), isMappingType, and isNumberType() from the
operator module; use the abstract base classes instead. Also removed
the repeat() function; use mul() instead.
- Issue #5021: doctest.testfile() did not create __name__ and
collections.namedtuple() relied on __name__ being defined.
- Backport importlib from Python 3.1. Only the import_module() function has
been backported to help facilitate transitions from 2.7 to 3.1.
- Issue #1885: distutils. When running sdist with --formats=tar,gztar
the tar file was overriden by the gztar one.
- Issue #4863: distutils.mwerkscompiler has been removed.
- Added a new itertools functions: combinations_with_replacement()
and compress().
- Issue #5032: added a step argument to itertools.count() and
allowed non-integer arguments.
- Fix and properly document the multiprocessing module's logging
support, expose the internal levels and provide proper usage
examples.
- Issue #1672332: fix unpickling of subnormal floats, which was
producing a ValueError on some platforms.
- Issue #3881: Help Tcl to load even when started through the
unreadable local symlink to "Program Files" on Vista.
- Issue #4710: Extract directories properly in the zipfile module;
allow adding directories to a zipfile.
- Issue #3807: _multiprocessing build fails when configure is passed
--without-threads argument. When this occurs, _multiprocessing will
be disabled, and not compiled.
- Issue #5008: When a file is opened in append mode with the new IO library,
do an explicit seek to the end of file (so that e.g. tell() returns the
file size rather than 0). This is consistent with the behaviour of the
traditional 2.x file object.
- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
parameter was set.
- Issue #4842: Always append a trailing 'L' when pickling longs using
pickle protocol 0. When reading, the 'L' is optional.
- Add the importlib package.
- Issue #4301: Patch the logging module to add processName support, remove
_check_logger_class from multiprocessing.
- Issue #3325: Remove python2.x try: except: imports for old cPickle from
multiprocessing.
- Issue #4959: inspect.formatargspec now works for keyword only arguments
without defaults.
- Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
for *nix machines for negative handles and large int handles. Without this check
it is possible to segfault the interpreter.
- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
in sharedctypes.py.
- Issue #1225107: inspect.isclass() returned True for instances with a custom
__getattr__.
- Issue #3826 and #4791: The socket module now closes the underlying socket
appropriately when it is being used via socket.makefile() objects
rather than delaying the close by waiting for garbage collection to do it.
- Issue #1696199: Add collections.Counter() for rapid and convenient
counting.
- Issue #3860: GzipFile and BZ2File now support the context manager protocol.
- Issue #4867: Fixed a crash in ctypes when passing a string to a
function without defining argtypes.
- Issue #4272: Add an optional argument to the GzipFile constructor to override
the timestamp in the gzip stream. The default value remains the current time.
The information can be used by e.g. gunzip when decompressing. Patch by
Jacques Frechet.
- Restore Python 2.3 compatibility for decimal.py.
- Issue #3638: Remove functions from _tkinter module level that depend on
TkappObject to work with multiple threads.
- Issue #4718: Adapt the wsgiref package so that it actually works with
Python 3.x, in accordance with the `official amendments of the spec
<http://www.wsgi.org/wsgi/Amendments_1.0>`_.
- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
to the decimal module.
- Fractions.from_float() no longer loses precision for integers too big to
cast as floats.
- Issue #4812: add missing underscore prefix to some internal-use-only
constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
did unnecessary work in the common case where no key function was specified.
- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
the function is not a generator.
- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
- Issue #4646: distutils was choking on empty options arg in the setup
function. Original patch by Thomas Heller.
- Issue #3767: Convert Tk object to string in tkColorChooser.
- Issue #3248: Allow placing ScrolledText in a PanedWindow.
- Issue #4444: Allow assertRaises() to be used as a context handler, so that
the code under test can be written inline if more practical.
- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
works as expected in the interactive environment.
- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
Gabriel Genellina.
- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
boundary.
- Issue #4223: inspect.getsource() will now correctly display source code
for packages loaded via zipimport (or any other conformant PEP 302
loader). Original patch by Alexander Belopolsky.
- Issue #4201: pdb can now access and display source code loaded via
zipimport (or any other conformant PEP 302 loader). Original patch by
Alexander Belopolsky.
- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
302 conformant loader) will now work correctly in most cases (they
are still subject to the constraints that exist for all code running
from inside a module loaded via a PEP 302 loader and attempting to
perform IO operations based on __file__). Original patch by
Alexander Belopolsky.
- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
allows backporting to maintenance branches. Original patch by
Alexander Belopolsky.
- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
a non-ASCII letter.
- Issue #4616: TarFile.utime(): Restore directory times on Windows.
- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
codec cannot be found. This is for compatibility with the builtin behavior.
- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
give correct results in the case where one argument is a quiet NaN
and the other is a finite number that requires rounding.
- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
libs.
- Added the subprocess.check_call_output() convenience function to get output
from a subprocess on success or raise an exception on error.
- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
support unusual filenames (such as those containing semi-colons) in
Content-Disposition headers.
- Issue #4384: Added logging integration with warnings module using
captureWarnings(). This change includes a NullHandler which does nothing;
it will be of use to library developers who want to avoid the "No handlers
could be found for logger XXX" message which can appear if the library user
doesn't configure logging.
- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
exception.
- Issue #4529: fix the parser module's validation of try-except-finally
statements.
- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
not a malformed option.
- Added the subprocess.check_output() convenience function to get output
from a subprocess on success or raise an exception on error.
- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
the corresponding tests now pass.
- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
it was calling the wrong open() function.
- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
support unusual filenames (such as those containing semi-colons) in
Content-Disposition headers.
- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
- Issue #5104: The socket module now raises OverflowError when 16-bit port and
protocol numbers are supplied outside the allowed 0-65536 range on bind()
and getservbyport().
- Windows locale mapping updated to Vista.
Tools/Demos
-----------
- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
and make it 2.6-compatible.
- Ttk demos added in Demo/tkinter/ttk/
- Issue #4677: add two list comprehension tests to pybench.
Build
-----
- Issue #6094: Build correctly with Subversion 1.7.
- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.
- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
linker, rather than always exit successfully. Patch by Floris Bruynooghe.
- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
the order that backends for the dbm extension are checked.
- Link the shared python library with $(MODLIBS).
- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
- Issue #4895: Use _strdup on Windows CE.
- Issue #4472: "configure --enable-shared" now works on OSX
- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
- Issue #4289: Remove Cancel button from AdvancedDlg.
- Issue #1656675: Register a drop handler for .py* files on Windows.
- Issue #4120: Exclude manifest from extension modules in VS2008.
- Issue #4091: Install pythonxy.dll in system32 again.
- Issue #4018: Disable "for me" installations on Vista.
- Issue #3758: Add ``patchcheck`` build target to .PHONY.
- Issue #4204: Fixed module build errors on FreeBSD 4.
C-API
-----
- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
for negative arguments. Previously, it raised TypeError.
- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
the GIL is released, or owned by another thread.
- Issue #4122: On Windows, fix a compilation error when using the
Py_UNICODE_ISSPACE macro in an extension module.
Extension Modules
-----------------
- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
supporting objects as input no matter how it was compiled (built in
implementations or external openssl library).
- Issue #4397: Fix occasional test_socket failure on OS X.
- Issue #4279: Fix build of parsermodule under Cygwin.
- Issue #4751: hashlib now releases the GIL when hashing large buffers
(with a hardwired threshold of 2048 bytes), allowing better parallelization
on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
- Issue #4738: Each zlib object now has a separate lock, allowing to compress
or decompress several streams at once on multi-CPU systems. Also, the GIL
is now released when computing the CRC of a large buffer. Patch by ebfe.
- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
OpenBSD.
- Issue #4583: array.array would not always prohibit resizing when a buffer
has been exported, resulting in an interpreter crash when accessing the
buffer.
- Issue #5228: Make functools.partial objects can now be pickled.
Tests
-----
- Issue #5450: Moved tests involving loading tk from Lib/test/test_tcl to
Lib/tkinter/test/test_tkinter/test_loadtk. With this, these tests demonstrate
the same behaviour as test_ttkguionly (and now also test_tk) which is to
skip the tests if DISPLAY is defined but can't be used.
- regrtest no longer treats ImportError as equivalent to SkipTest. Imports
that should cause a test to be skipped are now done using import_module
from test support, which does the conversion.
- Issue #5083: New 'gui' resource for regrtest.
Docs
----
**(For information about older versions, consult the HISTORY file.)**
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