- Issue #15604: Update uses of PyObject_IsTrue() to check for and handle
errors correctly. Patch by Serhiy Storchaka.
-- Issue #13119: sys.stdout and sys.stderr are now using "\r\n" newline on
- Windows, as Python 2.
+- Issue #14846: importlib.FileFinder now handles the case where the
+ directory being searched is removed after a previous import attempt
-- Issue #14579: Fix CVE-2012-2135: vulnerability in the utf-16 decoder after
- error handling. Patch by Serhiy Storchaka.
+Library
+-------
-- Issue #15404: Refleak in PyMethodObject repr.
+- Issue #15199: Fix JavaScript's default MIME type to application/javascript.
+ Patch by Bohuslav Kabrda.
-- Issue #15394: An issue in PyModule_Create that caused references to
- be leaked on some error paths has been fixed. Patch by Julia Lawall.
+- Issue #12643: code.InteractiveConsole now respects sys.excepthook when
+ displaying exceptions (Patch by Aaron Iles)
-- Issue #15368: An issue that caused bytecode generation to be
- non-deterministic when using randomized hashing (-R) has been fixed.
+- Issue #13579: string.Formatter now understands the 'a' conversion specifier.
-- Issue #15020: The program name used to search for Python's path is now
- "python3" under Unix, not "python".
+- Issue #15595: Fix subprocess.Popen(universal_newlines=True)
+ for certain locales (utf-16 and utf-32 family). Patch by Chris Jerdonek.
-- Issue #15033: Fix the exit status bug when modules invoked using -m swith,
- return the proper failure return value (1). Patch contributed by Jeff Knupp.
+- Issue #15477: In cmath and math modules, add workaround for platforms whose
+ system-supplied log1p function doesn't respect signs of zeros.
-- Issue #12268: File readline, readlines and read() or readall() methods
- no longer lose data when an underlying read system call is interrupted.
- IOError is no longer raised due to a read system call returning EINTR
- from within these methods.
+- Issue #15715: importlib.__import__() will silence an ImportError when the use
+ of fromlist leads to a failed import.
-- Issue #15142: Fix reference leak when deallocating instances of types
- created using PyType_FromSpec().
+- Issue #14669: Fix pickling of connections and sockets on MacOSX
+ by sending/receiving an acknowledgment after file descriptor transfer.
+ TestPicklingConnection has been reenabled for MacOSX.
-- Issue #10053: Don't close FDs when FileIO.__init__ fails. Loosely based on
- the work by Hirokazu Yamamoto.
+- Issue #11062: Fix adding a message from file to Babyl mailbox.
-- Issue #14775: Fix a potential quadratic dict build-up due to the garbage
- collector repeatedly trying to untrack dicts.
+- Issue #15646: Prevent equivalent of a fork bomb when using
+ multiprocessing on Windows without the "if __name__ == '__main__'"
+ idiom.
-- Issue #14494: Fix __future__.py and its documentation to note that
- absolute imports are the default behavior in 3.0 instead of 2.7.
- Patch by Sven Marnach.
+- Issue #15678: Fix IDLE menus when started from OS X command line
+ (3.3.0b2 regression).
-- Issue #14761: Fix potential leak on an error case in the import machinery.
+C API
+-----
-- Issue #14699: Fix calling the classmethod descriptor directly.
+Extension Modules
+-----------------
-- Issue #14433: Prevent msvcrt crash in interactive prompt when stdin
- is closed.
+Tools/Demos
+-----------
-- Issue #11603 (again): Setting __repr__ to __str__ now raises a RuntimeError
- when repr() or str() is called on such an object.
+Documentation
+-------------
-- Issue #14658: Fix binding a special method to a builtin implementation of a
- special method with a different name.
+- Create a 'Concurrent Execution' section in the docs, and split up the
+ 'Optional Operating System Services' section to use a more user-centric
+ classification scheme (splitting them across the new CE section, IPC and
+ text processing). Operating system limitatons can be reflected with
+ the Sphinx :platform: tag, it doesn't make sense as part of the Table of
+ Contents.
-- Issue #14630: Fix a memory access bug for instances of a subclass of int
- with value 0.
+- Issue #4966: Bring the sequence docs up to date for the Py3k transition
+ and the many language enhancements since they were original written
-- Issue #14612: Fix jumping around with blocks by setting f_lineno.
+- The "path importer" misnomer has been replaced with Eric Snow's
+ more-awkward-but-at-least-not-wrong suggestion of "path based finder" in
+ the import system reference docs
-- Issue #14607: Fix keyword-only arguments which started with ``__``.
+- Issue #15640: Document importlib.abc.Finder as deprecated.
-- Issue #13889: Check and (if necessary) set FPU control word before calling
- any of the dtoa.c string <-> float conversion functions, on MSVC builds of
- Python. This fixes issues when embedding Python in a Delphi app.
+- Issue #15630: Add an example for "continue" stmt in the tutorial. Patch by
+ Daniel Ellis.
-- Issue #14474: Save and restore exception state in thread.start_new_thread()
- while writing error message if the thread leaves a unhandled exception.
+Tests
+-----
-- Issue #13019: Fix potential reference leaks in bytearray.extend(). Patch
- by Suman Saha.
++- Issue #15285: Refactor the approach for testing connect timeouts using
++ two external hosts that have been configured specifically for this type
++ of test.
+
-- Issue #14378: Fix compiling ast.ImportFrom nodes with a "__future__" string as
- the module name that was not interned.
+- Issue #15743: Remove the deprecated method usage in urllib tests. Patch by
+ Jeff Knupp.
-- Issue #14331: Use significantly less stack space when importing modules by
- allocating path buffers on the heap instead of the stack.
+- Issue #15615: Add some tests for the json module's handling of invalid
+ input data. Patch by Kushal Das.
-- Issue #14334: Prevent in a segfault in type.__getattribute__ when it was not
- passed strings.
-- Issue #1469629: Allow cycles through an object's __dict__ slot to be
- collected. (For example if ``x.__dict__ is x``).
+What's New in Python 3.3.0 Beta 2?
+==================================
-- Issue #14172: Fix reference leak when marshalling a buffer-like object
- (other than a bytes object).
+*Release date: 12-Aug-2012*
-- Issue #13521: dict.setdefault() now does only one lookup for the given key,
- making it "atomic" for many purposes. Patch by Filip Gruszczyński.
+Core and Builtins
+-----------------
-- Issue #14471: Fix a possible buffer overrun in the winreg module.
+- Issue #15568: Fix the return value of "yield from" when StopIteration is
+ raised by a custom iterator.
-Library
--------
+- Issue #13119: sys.stdout and sys.stderr are now using "\r\n" newline on
+ Windows, as Python 2.
-- Issue #15199: Fix JavaScript's default MIME type to application/javascript.
- Patch by Bohuslav Kabrda.
+- Issue #15534: Fix the fast-search function for non-ASCII Unicode strings.
-- Issue #13579: string.Formatter now understands the 'a' conversion specifier.
+- Issue #15508: Fix the docstring for __import__ to have the proper default
+ value of 0 for 'level' and to not mention negative levels since they are not
+ supported.
-- Issue #15595: Fix subprocess.Popen(universal_newlines=True)
- for certain locales (utf-16 and utf-32 family). Patch by Chris Jerdonek.
+- Issue #15425: Eliminated traceback noise from more situations involving
+ importlib.
-- Issue #15477: In cmath and math modules, add workaround for platforms whose
- system-supplied log1p function doesn't respect signs of zeros.
+- Issue #14578: Support modules registered in the Windows registry again.
-- Issue #11062: Fix adding a message from file to Babyl mailbox.
+- Issue #15466: Stop using TYPE_INT64 in marshal, to make importlib.h (and other
+ byte code files) equal between 32-bit and 64-bit systems.
-- Issue #15646: Prevent equivalent of a fork bomb when using
- multiprocessing on Windows without the "if __name__ == '__main__'"
- idiom.
+- Issue #1692335: Move initial exception args assignment to
+ "BaseException.__new__" to help pickling of naive subclasses.
-- Issue #15424: Add a __sizeof__ implementation for array objects.
- Patch by Ludwig Hähne.
+- Issue #12834: Fix PyBuffer_ToContiguous() for non-contiguous arrays.
-- Issue #13052: Fix IDLE crashing when replace string in Search/Replace dialog
- ended with '\'. Patch by Roger Serwy.
+- Issue #15456: Fix code __sizeof__ after #12399 change. Patch by Serhiy
+ Storchaka.
-- Issue #15538: Fix compilation of the getnameinfo() / getaddrinfo()
- emulation code. Patch by Philipp Hagemeister.
+- Issue #15404: Refleak in PyMethodObject repr.
-- Issue #9803: Don't close IDLE on saving if breakpoint is open.
- Patch by Roger Serwy.
+- Issue #15394: An issue in PyModule_Create that caused references to be leaked
+ on some error paths has been fixed. Patch by Julia Lawall.
-- Issue #12288: Consider '0' and '0.0' as valid initialvalue
- for tkinter SimpleDialog.
+- Issue #15368: An issue that caused bytecode generation to be non-deterministic
+ has been fixed.
-- Issue #15512: Add a __sizeof__ implementation for parser.
- Patch by Serhiy Storchaka.
+- Issue #15202: Consistently use the name "follow_symlinks" for new parameters
+ in os and shutil functions.
-- Issue #15469: Add a __sizeof__ implementation for deque objects.
- Patch by Serhiy Storchaka.
+- Issue #15314: __main__.__loader__ is now set correctly during interpreter
+ startup.
-- Issue #15489: Add a __sizeof__ implementation for BytesIO objects.
- Patch by Serhiy Storchaka.
+- Issue #15111: When a module imported using 'from import' has an ImportError
+ inside itself, don't mask that fact behind a generic ImportError for the
+ module itself.
-- Issue #15487: Add a __sizeof__ implementation for buffered I/O objects.
- Patch by Serhiy Storchaka.
+- Issue #15293: Add GC support to the AST base node type.
-- Issue #6056: Make multiprocessing use setblocking(True) on the
- sockets it uses. Original patch by J Derek Wilson.
+- Issue #15291: Fix a memory leak where AST nodes where not properly
+ deallocated.
-- Issue #15041: update "see also" list in tkinter documentation.
+- Issue #15110: Fix the tracebacks generated by "import xxx" to not show the
+ importlib stack frames.
-- Issue #15402: An issue in the struct module that caused sys.getsizeof to
- return incorrect results for struct.Struct instances has been fixed.
- Initial patch by Serhiy Storchaka.
+- Issue #15020: The program name used to search for Python's path is now
+ "python3" under Unix, not "python".
-- Issue #15232: when mangle_from is True, email.Generator now correctly mangles
- lines that start with 'From ' that occur in a MIME preamble or epilogue.
+- Issue #15033: Fix the exit status bug when modules invoked using -m swith,
+ return the proper failure return value (1). Patch contributed by Jeff Knupp.
-- Issue #13922: argparse no longer incorrectly strips '--'s that appear
- after the first one.
+- Issue #15229: An OSError subclass whose __init__ doesn't call back
+ OSError.__init__ could produce incomplete instances, leading to crashes when
+ calling str() on them.
-- Issue #12353: argparse now correctly handles null argument values.
+- Issue 15307: Virtual environments now use symlinks with framework builds on
+ Mac OS X, like other POSIX builds.
-- Issues #10017 and #14998: Fix TypeError using pprint on dictionaries with
- user-defined types as keys or other unorderable keys.
+Library
+-------
-- Issue #14635: telnetlib will use poll() rather than select() when possible
- to avoid failing due to the select() file descriptor limit.
+- Issue #15424: Add a __sizeof__ implementation for array objects. Patch by
+ Ludwig Hähne.
-- Issue #15180: Clarify posixpath.join() error message when mixing str & bytes
+- Issue #15576: Allow extension modules to act as a package's __init__ module.
-- Issue #15230: runpy.run_path now correctly sets __package__ as described
- in the documentation
+- Issue #15502: Have importlib.invalidate_caches() work on sys.meta_path instead
+ of sys.path_importer_cache.
-- Issue #14990: Correctly fail with SyntaxError on invalid encoding
- declaration.
+- Issue #15163: Pydoc shouldn't list __loader__ as module data.
-- Issue #15247: FileIO now raises an error when given a file descriptor
- pointing to a directory.
+- Issue #15471: Do not use mutable objects as defaults for
+ importlib.__import__().
-- Issue #5346: Preserve permissions of mbox, MMDF and Babyl mailbox
- files on flush().
+- Issue #15559: To avoid a problematic failure mode when passed to the bytes
+ constructor, objects in the ipaddress module no longer implement __index__
+ (they still implement __int__ as appropriate)
-- Issue #10571: Fix the "--sign" option of distutils' upload command.
- Patch by Jakub Wilk.
+- Issue #15546: Fix handling of pathological input data in the peek() and
+ read1() methods of the BZ2File, GzipFile and LZMAFile classes.
-- Issue #9559: If messages were only added, a new file is no longer
- created and renamed over the old file when flush() is called on an
- mbox, MMDF or Babyl mailbox.
+- Issue #13052: Fix IDLE crashing when replace string in Search/Replace dialog
+ ended with '\'. Patch by Roger Serwy.
-- Issue #14653: email.utils.mktime_tz() no longer relies on system
- mktime() when timezone offest is supplied.
+- Issue #12655: Instead of requiring a custom type, os.sched_getaffinity and
+ os.sched_setaffinity now use regular sets of integers to represent the CPUs a
+ process is restricted to.
-- Fix GzipFile's handling of filenames given as bytes objects.
+- Issue #15538: Fix compilation of the getnameinfo() / getaddrinfo() emulation
+ code. Patch by Philipp Hagemeister.
-- Issue #15101: Make pool finalizer avoid joining current thread.
+- Issue #15519: Properly expose WindowsRegistryFinder in importlib (and use the
+ correct term for it). Original patch by Eric Snow.
-- Issue #15036: Mailbox no longer throws an error if a flush is done
- between operations when removing or changing multiple items in mbox,
- MMDF, or Babyl mailboxes.
+- Issue #15502: Bring the importlib ABCs into line with the current state of the
+ import protocols given PEP 420. Original patch by Eric Snow.
-- Issue #10133: Make multiprocessing deallocate buffer if socket read
- fails. Patch by Hallvard B Furuseth.
+- Issue #15499: Launching a webbrowser in Unix used to sleep for a few seconds.
+ Original patch by Anton Barkovsky.
-- Issue #13854: Make multiprocessing properly handle non-integer
- non-string argument to SystemExit.
+- Issue #15463: The faulthandler module truncates strings to 500 characters,
+ instead of 100, to be able to display long file paths.
-- Issue #12157: Make pool.map() empty iterables correctly. Initial
- patch by mouad.
+- Issue #6056: Make multiprocessing use setblocking(True) on the sockets it
+ uses. Original patch by J Derek Wilson.
-- Issue #14992: os.makedirs(path, exist_ok=True) would raise an OSError
- when the path existed and had the S_ISGID mode bit set when it was
- not explicitly asked for. This is no longer an exception as mkdir
- cannot control if the OS sets that bit for it or not.
+- Issue #15364: Fix sysconfig.get_config_var('srcdir') to be an absolute path.
-- Issue #14962: Update text coloring in IDLE shell window after changing
- options. Patch by Roger Serwy.
+- Issue #15041: Update "see also" list in tkinter documentation.
-- Issue #10997: Prevent a duplicate entry in IDLE's "Recent Files" menu.
+- Issue #15413: os.times() had disappeared under Windows.
-- Issue #14443: Tell rpmbuild to use the correct version of Python in
- bdist_rpm. Initial patch by Ross Lagerwall.
+- Issue #15402: An issue in the struct module that caused sys.getsizeof to
+ return incorrect results for struct.Struct instances has been fixed. Initial
+ patch by Serhiy Storchaka.
-- Issue #14929: Stop Idle 3.x from closing on Unicode decode errors when
- grepping. Patch by Roger Serwy.
+- Issue #15232: When mangle_from is True, email.Generator now correctly mangles
+ lines that start with 'From ' that occur in a MIME preamble or epilogue.
-- Issue #12510: Attempting to get invalid tooltip no longer closes Idle.
- Other tooltipss have been corrected or improved and the number of tests
- has been tripled. Original patch by Roger Serwy.
+- Issue #15094: Incorrectly placed #endif in _tkinter.c. Patch by Serhiy
+ Storchaka.
-- Issue #10365: File open dialog now works instead of crashing even when
- the parent window is closed before the dialog. Patch by Roger Serwy.
+- Issue #13922: argparse no longer incorrectly strips '--'s that appear after
+ the first one.
-- Issue #14876: Use user-selected font for highlight configuration.
+- Issue #12353: argparse now correctly handles null argument values.
-- Issue #14920: Fix the help(urllib.parse) failure on locale C on terminals.
- Have ascii characters in help.
+- Issue #10017, issue #14998: Fix TypeError using pprint on dictionaries with
+ user-defined types as keys or other unorderable keys.
-- Issue #14863: Update the documentation of os.fdopen() to reflect the
- fact that it's only a thin wrapper around open() anymore.
+- Issue #15397: inspect.getmodulename() is now based directly on importlib via a
+ new importlib.machinery.all_suffixes() API.
-- Issue #14036: Add an additional check to validate that port in urlparse does
- not go in illegal range and returns None.
+- Issue #14635: telnetlib will use poll() rather than select() when possible to
+ avoid failing due to the select() file descriptor limit.
-- Issue #14875: Use float('inf') instead of float('1e66666') in the json module.
+- Issue #15180: Clarify posixpath.join() error message when mixing str & bytes.
-- Issue #14426: Correct the Date format in Expires attribute of Set-Cookie
- Header in Cookie.py.
+- Issue #15343: pkgutil now includes an iter_importer_modules implementation for
+ importlib.machinery.FileFinder (similar to the way it already handled
+ zipimport.zipimporter).
-- Issue #14721: Send the correct 'Content-length: 0' header when the body is an
- empty string ''. Initial Patch contributed by Arve Knudsen.
+- Issue #15314: runpy now sets __main__.__loader__ correctly.
-- Issue #14072: Fix parsing of 'tel' URIs in urlparse by making the check for
- ports stricter.
+- Issue #15357: The import emulation in pkgutil is now deprecated. pkgutil uses
+ importlib internally rather than the emulation.
-- Issue #9374: Generic parsing of query and fragment portions of url for any
- scheme. Supported both by RFC3986 and RFC2396.
+- Issue #15233: Python now guarantees that callables registered with the atexit
+ module will be called in a deterministic order.
-- Issue #14798: Fix the functions in pyclbr to raise an ImportError
- when the first part of a dotted name is not a package. Patch by
- Xavier de Gaye.
+- Issue #15238: shutil.copystat now copies Linux "extended attributes".
-- Issue #14829: Fix bisect and range() indexing with large indices
- (>= 2 ** 32) under 64-bit Windows.
+- Issue #15230: runpy.run_path now correctly sets __package__ as described in
+ the documentation.
-- Issue #14777: tkinter may return undecoded UTF-8 bytes as a string when
- accessing the Tk clipboard. Modify clipboad_get() to first request type
- UTF8_STRING when no specific type is requested in an X11 windowing
- environment, falling back to the current default type STRING if that fails.
- Original patch by Thomas Kluyver.
+- Issue #15315: Support VS 2010 in distutils cygwincompiler.
-- Issue #12541: Be lenient with quotes around Realm field of HTTP Basic
- Authentation in urllib2.
+- Issue #15294: Fix a regression in pkgutil.extend_path()'s handling of nested
+ namespace packages.
-- Issue #14662: Prevent shutil failures on OS X when destination does not
- support chflag operations. Patch by Hynek Schlawack.
+- Issue #15056: imp.cache_from_source() and source_from_cache() raise
+ NotImplementedError when sys.implementation.cache_tag is set to None.
-- Issue #14157: Fix time.strptime failing without a year on February 29th.
- Patch by Hynek Schlawack.
+- Issue #15256: Grammatical mistake in exception raised by imp.find_module().
-- Issue #14768: os.path.expanduser('~/a') doesn't works correctly when HOME is '/'.
+- Issue #5931: wsgiref environ variable SERVER_SOFTWARE will specify an
+ implementation specific term like CPython, Jython instead of generic "Python".
-- Issue #14741: Fix missing support for Ellipsis ('...') in parser module.
+- Issue #13248: Remove obsolete argument "max_buffer_size" of BufferedWriter and
+ BufferedRWPair, from the io module.
-- Issue #14697: Fix missing support for set displays and set comprehensions in
- parser module.
+- Issue #13248: Remove obsolete argument "version" of argparse.ArgumentParser.
-- Issue #14701: Fix missing support for 'raise ... from' in parser module.
+- Issue #14814: Implement more consistent ordering and sorting behaviour for
+ ipaddress objects.
-- Issue #13183: Fix pdb skipping frames after hitting a breakpoint and running
- step. Patch by Xavier de Gaye.
+- Issue #14814: ipaddress network objects correctly return NotImplemented when
+ compared to arbitrary objects instead of raising TypeError.
-- Issue #14696: Fix parser module to understand 'nonlocal' declarations.
+- Issue #14990: Correctly fail with SyntaxError on invalid encoding declaration.
-- Issue #10941: Fix imaplib.Internaldate2tuple to produce correct result near
- the DST transition. Patch by Joe Peterson.
+- Issue #14814: ipaddress now provides more informative error messages when
+ constructing instances directly (changes permitted during beta due to
+ provisional API status).
-- Issue #9154: Fix parser module to understand function annotations.
+- Issue #15247: FileIO now raises an error when given a file descriptor pointing
+ to a directory.
-- Issue #14664: It is now possible to use @unittest.skip{If,Unless} on a
- test class that doesn't inherit from TestCase (i.e. a mixin).
+- Issue #15261: Stop os.stat(fd) crashing on Windows when fd not open.
-- Issue #14160: TarFile.extractfile() failed to resolve symbolic links when
- the links were not located in an archive subdirectory.
+- Issue #15166: Implement imp.get_tag() using sys.implementation.cache_tag.
-- Issue #14638: pydoc now treats non-string __name__ values as if they
- were missing, instead of raising an error.
+- Issue #15210: Catch KeyError when importlib.__init__ can't find
+ _frozen_importlib in sys.modules, not ImportError.
-- Issue #13684: Fix httplib tunnel issue of infinite loops for certain sites
- which send EOF without trailing \r\n.
+- Issue #15030: importlib.abc.PyPycLoader now supports the new source size
+ header field in .pyc files.
-- Issue #14629: Raise SyntaxError in tokenizer.detect_encoding if the
- first two lines have non-UTF-8 characters without an encoding declaration.
+- Issue #5346: Preserve permissions of mbox, MMDF and Babyl mailbox files on
+ flush().
-- Issue #14308: Fix an exception when a "dummy" thread is in the threading
- module's active list after a fork().
+- Issue #10571: Fix the "--sign" option of distutils' upload command. Patch by
+ Jakub Wilk.
-- Issue #14538: HTMLParser can now parse correctly start tags that contain
- a bare '/'.
+- Issue #9559: If messages were only added, a new file is no longer created and
+ renamed over the old file when flush() is called on an mbox, MMDF or Babyl
+ mailbox.
-- Issue #14452: SysLogHandler no longer inserts a UTF-8 BOM into the message.
+- Issue 10924: Fixed crypt.mksalt() to use a RNG that is suitable for
+ cryptographic purpose.
-- Issue #13496: Fix potential overflow in bisect.bisect algorithm when applied
- to a collection of size > sys.maxsize / 2.
+- Issue #15184: Ensure consistent results of OS X configuration tailoring for
+ universal builds by factoring out common OS X-specific customizations from
+ sysconfig, distutils.sysconfig, distutils.util, and distutils.unixccompiler
+ into a new module _osx_support.
-- Issue #14399: zipfile now recognizes that the archive has been modified even
- if only the comment is changed. In addition, the TypeError that results from
- trying to set a non-binary value as a comment is now now raised at the time
- the comment is set rather than at the time the zipfile is written.
+C API
+-----
-- Issue #7978: socketserver now restarts the select() call when EINTR is
- returned. This avoids crashing the server loop when a signal is received.
- Patch by Jerzy Kozera.
+- Issue #15610: PyImport_ImportModuleEx() now uses a 'level' of 0 instead of -1.
-- Issue #14496: Fix wrong name in idlelib/tabbedpages.py.
- Patch by Popa Claudiu.
+- Issues #15169, #14599: Strip out the C implementation of
+ imp.source_from_cache() used by PyImport_ExecCodeModuleWithPathnames() and
+ used the Python code instead. Leads to PyImport_ExecCodeModuleObject() to not
+ try to infer the source path from the bytecode path as
+ PyImport_ExecCodeModuleWithPathnames() does.
-- Issue #14482: Raise a ValueError, not a NameError, when trying to create
- a multiprocessing Client or Listener with an AF_UNIX type address under
- Windows. Patch by Popa Claudiu.
+Extension Modules
+-----------------
-- Issue #14151: Raise a ValueError, not a NameError, when trying to create
- a multiprocessing Client or Listener with an AF_PIPE type address under
- non-Windows platforms. Patch by Popa Claudiu.
+- Issue #6493: An issue in ctypes on Windows that caused structure bitfields
+ of type ctypes.c_uint32 and width 32 to incorrectly be set has been fixed.
-- Issue #13872: socket.detach() now marks the socket closed (as mirrored
- in the socket repr()). Patch by Matt Joiner.
+- Issue #15194: Update libffi to the 3.0.11 release.
-- Issue #14406: Fix a race condition when using ``concurrent.futures.wait(
- return_when=ALL_COMPLETED)``. Patch by Matt Joiner.
+Tools/Demos
+-----------
-- Issue #14409: IDLE now properly executes commands in the Shell window
- when it cannot read the normal config files on startup and
- has to use the built-in default key bindings.
- There was previously a bug in one of the defaults.
+- Issue #15458: python-config gets a new option --configdir to print the $LIBPL
+ value.
-- Issue #10340: asyncore - properly handle EINVAL in dispatcher constructor on
- OSX; avoid to call handle_connect in case of a disconnected socket which
- was not meant to connect.
+- Move importlib.test.benchmark to Tools/importbench.
-- Issue #12757: Fix the skipping of doctests when python is run with -OO so
- that it works in unittest's verbose mode as well as non-verbose mode.
+- Issue #12605: The gdb hooks for debugging CPython (within Tools/gdb) have been
+ enhanced to show information on more C frames relevant to CPython within the
+ "py-bt" and "py-bt-full" commands:
+ * C frames that are waiting on the GIL
+ * C frames that are garbage-collecting
+ * C frames that are due to the invocation of a PyCFunction
-- Issue #3573: IDLE hangs when passing invalid command line args
- (directory(ies) instead of file(s)) (Patch by Guilherme Polo)
+Documentation
+-------------
-- Issue #13694: asynchronous connect in asyncore.dispatcher does not set addr
- attribute.
+- Issue #15444: Use proper spelling for non-ASCII contributor names. Patch
+ by Serhiy Storchaka.
-- Issue #11686: Added missing entries to email package __all__ lists
- (mostly the new Bytes classes).
+- Issue #15295: Reorganize and rewrite the documentation on the import system.
-- Issue #10484: Fix the CGIHTTPServer's PATH_INFO handling problem.
+- Issue #15230: Clearly document some of the limitations of the runpy module and
+ nudge readers towards importlib when appropriate.
-- Issue #11199: Fix the with urllib which hangs on particular ftp urls.
+- Issue #15053: Copy Python 3.3 import lock change notice to all relevant
+ functions in imp instead of just at the top of the relevant section.
-- Issue #14062: Header objects now correctly respect the 'linesep' setting
- when processed by BytesParser (which smtplib.SMTP.send_message uses).
+- Issue #15288: Link to the term "loader" in notes in pkgutil about how things
+ won't work as expected in Python 3.3 and mark the requisite functions as
+ "changed" since they will no longer work with modules directly imported by
+ import itself.
-- Issue #14291: Email now defaults to utf-8 for non-ASCII unicode headers
- instead of raising an error. This fixes a regression relative to 2.7.
+- Issue #13557: Clarify effect of giving two different namespaces to exec or
+ execfile().
-- Issue #5219: Prevent event handler cascade in IDLE.
+- Issue #15250: Document that filecmp.dircmp compares files shallowly. Patch
+ contributed by Chris Jerdonek.
-- Issue #14184: Increase the default stack size for secondary threads on
- Mac OS X to avoid interpreter crashes when using threads on 10.7.
+Tests
+-----
-- Issue #10543: Fix unittest test discovery with Jython bytecode files.
+- Issue #15467: Move helpers for __sizeof__ tests into test_support. Patch by
+ Serhiy Storchaka.
-- Issue #14252: Fix subprocess.Popen.terminate() to not raise an error under
- Windows when the child process has already exited.
+- Issue #15320: Make iterating the list of tests thread-safe when running tests
+ in multiprocess mode. Patch by Chris Jerdonek.
-- Issue #14195: An issue that caused weakref.WeakSet instances to incorrectly
- return True for a WeakSet instance 'a' in both 'a < a' and 'a > a' has been
- fixed.
+- Issue #15168: Move importlib.test to test.test_importlib.
-- Issue #14177: marshal.loads() now raises TypeError when given an unicode
- string. Patch by Guilherme Gonçalves.
+- Issue #15091: Reactivate a test on UNIX which was failing thanks to a
+ forgotten importlib.invalidate_caches() call.
-- Issue #14159: Fix the len() of weak containers (WeakSet, WeakKeyDictionary,
- WeakValueDictionary) to return a better approximation when some objects
- are dead or dying. Moreover, the implementation is now O(1) rather than
- O(n).
+- Issue #15230: Adopted a more systematic approach in the runpy tests.
-- Issue #13125: Silence spurious test_lib2to3 output when in non-verbose mode.
- Patch by Mikhail Novikov.
+- Issue #15300: Ensure the temporary test working directories are in the same
+ parent folder when running tests in multiprocess mode from a Python build.
+ Patch by Chris Jerdonek.
-- Issue #13447: Add a test file to host regression tests for bugs in the
- scripts found in the Tools directory.
+- Issue #15284: Skip {send,recv}msg tests in test_socket when IPv6 is not
+ enabled. Patch by Brian Brazil.
-- Issue #8033: sqlite3: Fix 64-bit integer handling in user functions
- on 32-bit architectures. Initial patch by Philippe Devalkeneer.
+- Issue #15277: Fix a resource leak in support.py when IPv6 is disabled. Patch
+ by Brian Brazil.
-Extension Modules
+Build
+-----
+
+- Issue #11715: Fix multiarch detection without having Debian development tools
+ (dpkg-dev) installed.
+
+- Issue #15037: Build OS X installers with local copy of ncurses 5.9 libraries
+ to avoid curses.unget_wch bug present in older versions of ncurses such as
+ those shipped with OS X.
+
+- Issue #15560: Fix building _sqlite3 extension on OS X with an SDK. Also, for
+ OS X installers, ensure consistent sqlite3 behavior and feature availability
+ by building a local copy of libsqlite3 rather than depending on the wide range
+ of versions supplied with various OS X releases.
+
+- Issue #8847: Disable COMDAT folding in Windows PGO builds.
+
+- Issue #14018: Fix OS X Tcl/Tk framework checking when using OS X SDKs.
+
+- Issue #15431: Add _freeze_importlib project to regenerate importlib.h on
+ Windows. Patch by Kristján Valur Jónsson.
+
+- Issue #14197: For OS X framework builds, ensure links to the shared library
+ are created with the proper ABI suffix.
+
+- Issue #14330: For cross builds, don't use host python, use host search paths
+ for host compiler.
+
+- Issue #15235: Allow Berkley DB versions up to 5.3 to build the dbm module.
+
+- Issue #15268: Search curses.h in /usr/include/ncursesw.
+
+
+What's New in Python 3.3.0 Beta 1?
+==================================
+
+*Release date: 27-Jun-2012*
+
+Core and Builtins
-----------------
-- Issue #6493: An issue in ctypes on Windows that caused structure bitfields
- of type ctypes.c_uint32 and width 32 to incorrectly be set has been fixed.
+- Fix a (most likely) very rare memory leak when calling main() and not being
+ able to decode a command-line argument.
-- Issue #15000: Support the "unique" x32 architecture in _posixsubprocess.c.
+- Issue #14815: Use Py_ssize_t instead of long for the object hash, to
+ preserve all 64 bits of hash on Win64.
-- Issue #9041: An issue in ctypes.c_longdouble, ctypes.c_double, and
- ctypes.c_float that caused an incorrect exception to be returned in the
- case of overflow has been fixed.
+- Issue #12268: File readline, readlines and read() or readall() methods
+ no longer lose data when an underlying read system call is interrupted.
+ IOError is no longer raised due to a read system call returning EINTR
+ from within these methods.
-- Issue #14212: The re module didn't retain a reference to buffers it was
- scanning, resulting in segfaults.
+- Issue #11626: Add _SizeT functions to stable ABI.
-Tests
------
+- Issue #15146: Add PyType_FromSpecWithBases. Patch by Robin Schreiber.
-- Issue #15285: Refactor the approach for testing connect timeouts using
- two external hosts that have been configured specifically for this type
- of test.
+- Issue #15142: Fix reference leak when deallocating instances of types
+ created using PyType_FromSpec().
-- Issue #15615: Add some tests for the json module's handling of invalid
- input data. Patch by Kushal Das.
+- Issue #15042: Add PyState_AddModule and PyState_RemoveModule. Add version
+ guard for Py_LIMITED_API additions. Patch by Robin Schreiber.
-- Issue #15496: Add directory removal helpers for tests on Windows.
- Patch by Jeremy Kloth.
+- Issue #10053: Don't close FDs when FileIO.__init__ fails. Loosely based on
+ the work by Hirokazu Yamamoto.
+
+- Issue #15096: Removed support for ur'' as the raw notation isn't
+ compatible with Python 2.x's raw unicode strings.
+
+- Issue #13783: Generator objects now use the identifier APIs internally
-- Issue #15467: Move helpers for __sizeof__ tests into test_support.
+- Issue #14874: Restore charmap decoding speed to pre-PEP 393 levels.
Patch by Serhiy Storchaka.
-- Issue #15320: Make iterating the list of tests thread-safe when running
- tests in multiprocess mode. Patch by Chris Jerdonek.
+- Issue #15026: utf-16 encoding is now significantly faster (up to 10x).
+ Patch by Serhiy Storchaka.
-- Issue #15230: Adopted a more systematic approach in the runpy tests
+- Issue #11022: open() and io.TextIOWrapper are now calling
+ locale.getpreferredencoding(False) instead of locale.getpreferredencoding()
+ in text mode if the encoding is not specified. Don't change temporary the
+ locale encoding using locale.setlocale(), use the current locale encoding
+ instead of the user preferred encoding.
-- Issue #15300: Ensure the temporary test working directories are in the same
- parent folder when running tests in multiprocess mode from a Python build.
- Patch by Chris Jerdonek.
+- Issue #14673: Add Eric Snow's sys.implementation implementation.
-- test_nntplib now tolerates being run from behind NNTP gateways that add
- "X-Antivirus" headers to articles
+- Issue #15038: Optimize python Locks on Windows.
-- Issue #15043: test_gdb is now skipped entirely if gdb security settings
- block loading of the gdb hooks
+Library
+-------
-- Issue #14026: In test_cmd_line_script, check that sys.argv is populated
- correctly for the various invocation approaches (Patch by Jason Yeo)
+- Issue #9803: Don't close IDLE on saving if breakpoint is open.
+ Patch by Roger Serwy.
-- Issue #14032: Fix incorrect variable name in test_cmd_line_script debugging
- message (Patch by Jason Yeo)
+- Issue #12288: Consider '0' and '0.0' as valid initialvalue
+ for tkinter SimpleDialog.
-- Issue #14589: Update certificate chain for sha256.tbs-internet.com, fixing
- a test failure in test_ssl.
+- Issue #15512: Add a __sizeof__ implementation for parser.
+ Patch by Serhiy Storchaka.
-Build
------
+- Issue #15469: Add a __sizeof__ implementation for deque objects.
+ Patch by Serhiy Storchaka.
-- Issue #15560: Fix building _sqlite3 extension on OS X with an SDK.
+- Issue #15489: Add a __sizeof__ implementation for BytesIO objects.
+ Patch by Serhiy Storchaka.
-- Issue #8847: Disable COMDAT folding in Windows PGO builds.
+- Issue #15487: Add a __sizeof__ implementation for buffered I/O objects.
+ Patch by Serhiy Storchaka.
-- Issue #14197: For OS X framework builds, ensure links to the shared
- library are created with the proper ABI suffix.
+- Issue #15514: Correct __sizeof__ support for cpu_set.
+ Patch by Serhiy Storchaka.
-- Issue #14472: Update .gitignore. Patch by Matej Cepl.
+- Issue #15187: Bugfix: remove temporary directories test_shutil was leaving
+ behind.
-- The Windows build now uses OpenSSL 1.0.0j and bzip2 1.0.6.
+- Issue #15177: Added dir_fd parameter to os.fwalk().
-- Issue #14557: Fix extensions build on HP-UX. Patch by Adi Roiban.
+- Issue #15176: Clarified behavior, documentation, and implementation
+ of os.listdir().
-- Issue #14437: Fix building the _io module under Cygwin.
+- Issue #15061: Re-implemented hmac.compare_digest() in C to prevent further
+ timing analysis and to support all buffer protocol aware objects as well as
+ ASCII only str instances safely.
-- Issue #14387: Do not include accu.h from Python.h.
+- Issue #15164: Change return value of platform.uname() from a
+ plain tuple to a collections.namedtuple.
-- Issue #14359: Only use O_CLOEXEC in _posixmodule.c if it is defined.
- Based on patch from Hervé Coatanhay.
+- Support Mageia Linux in the platform module.
-- Issue #14018: Fix OS X Tcl/Tk framework checking when using OS X SDKs.
+- Issue #11678: Support Arch linux in the platform module.
-Documentation
--------------
+- Issue #15118: Change return value of os.uname() and os.times() from
+ plain tuples to immutable iterable objects with named attributes
+ (structseq objects).
-- Issue #15630: Add an example for "continue" stmt in the tutorial. Patch by
- Daniel Ellis.
+- Speed up _decimal by another 10-15% by caching the thread local context
+ that was last accessed. In the pi benchmark (64-bit platform, prec=9),
+ _decimal is now only 1.5x slower than float.
-- Issue #15444: Use proper spelling for non-ASCII contributor names. Patch
- by Serhiy Storchaka.
+- Remove the packaging module, which is not ready for prime time.
-- Issue 15482: Properly document the default 'level' value for __import__()
- while warning about using negative values.
+- Issue #15154: Add "dir_fd" parameter to os.rmdir, remove "rmdir"
+ parameter from os.remove / os.unlink.
-- Issue #15230: Clearly document some of the limitations of the runpy
- module and nudge readers towards importlib when appropriate.
+- Issue #4489: Add a shutil.rmtree that isn't susceptible to symlink attacks.
+ It is used automatically on platforms supporting the necessary os.openat()
+ and os.unlinkat() functions. Main code by Martin von Löwis.
-- Issue #13557: Clarify effect of giving two different namespaces to exec or
- execfile().
+- Issue #15156: HTMLParser now uses the new "html.entities.html5" dictionary.
-- Issue #8799: Fix and improve the threading.Condition documentation.
+- Issue #11113: add a new "html5" dictionary containing the named character
+ references defined by the HTML5 standard and the equivalent Unicode
+ character(s) to the html.entities module.
-- Issue #14943: Correct a default argument value for winreg.OpenKey
- and correctly list the argument names in the function's explanation.
+- Issue #15114: the strict mode of HTMLParser and the HTMLParseError exception
+ are deprecated now that the parser is able to parse invalid markup.
-- Issue #14034: added the argparse tutorial.
+- Issue #3665: \u and \U escapes are now supported in unicode regular
+ expressions. Patch by Serhiy Storchaka.
-- Issue #15250: Document that filecmp.dircmp compares files shallowly. Patch
- contributed by Chris Jerdonek.
+- Issue #15153: Added inspect.getgeneratorlocals to simplify white box
+ testing of generator state updates
-Tools/Demos
------------
+- Issue #13062: Added inspect.getclosurevars to simplify testing stateful
+ closures
-- Issue #14695: Fix missing support for starred assignments in
- Tools/parser/unparse.py.
+- Issue #11024: Fixes and additional tests for Time2Internaldate.
+- Issue #14626: Large refactoring of functions / parameters in the os module.
+ Many functions now support "dir_fd" and "follow_symlinks" parameters;
+ some also support accepting an open file descriptor in place of of a path
+ string. Added os.support_* collections as LBYL helpers. Removed many
+ functions only previously seen in 3.3 alpha releases (often starting with
+ "f" or "l", or ending with "at"). Originally suggested by Serhiy Storchaka;
+ implemented by Larry Hastings.
-What's New in Python 3.2.3?
-===========================
+- Issue #15008: Implement PEP 362 "Signature Objects".
+ Patch by Yury Selivanov.
-*Release date: 10-Apr-2012*
+- Issue: #15138: base64.urlsafe_{en,de}code() are now 3-4x faster.
-Build
------
+- Issue #444582: Add shutil.which, for finding programs on the system path.
+ Original patch by Erik Demaine, with later iterations by Jan Killian
+ and Brian Curtin.
-- Issue #14387: Work around a problem building extension modules under Windows
- by undefining ``small`` before use in the Python headers.
+- Issue #14837: SSL errors now have ``library`` and ``reason`` attributes
+ describing precisely what happened and in which OpenSSL submodule. The
+ str() of a SSLError is also enhanced accordingly.
+- Issue #9527: datetime.astimezone() method will now supply a class
+ timezone instance corresponding to the system local timezone when
+ called with no arguments.
-What's New in Python 3.2.3 release candidate 2?
-===============================================
+- Issue #14653: email.utils.mktime_tz() no longer relies on system
+ mktime() when timezone offest is supplied.
-*Release date: 18-Mar-2012*
+- Issue #14684: zlib.compressobj() and zlib.decompressobj() now support the use
+ of predefined compression dictionaries. Original patch by Sam Rushing.
-Library
--------
+- Fix GzipFile's handling of filenames given as bytes objects.
-- Issue #6884: Fix long-standing bugs with MANIFEST.in parsing in distutils
- on Windows.
+- Issue #14772: Return destination values from some shutil functions.
+
+- Issue #15064: Implement context manager protocol for multiprocessing types
+
+- Issue #15101: Make pool finalizer avoid joining current thread.
+
+- Issue #14657: The frozen instance of importlib used for bootstrap is now
+ also the module imported as importlib._bootstrap.
+
+- Issue #14055: Add __sizeof__ support to _elementtree.
+
+- Issue #15054: A bug in tokenize.tokenize that caused string literals
+ with 'b' prefixes to be incorrectly tokenized has been fixed.
+ Patch by Serhiy Storchaka.
+
+- Issue #15006: Allow equality comparison between naive and aware
+ time or datetime objects.
+
+- Issue #14982: Document that pkgutil's iteration functions require the
+ non-standard iter_modules() method to be defined by an importer (something
+ the importlib importers do not define).
+
+- Issue #15036: Mailbox no longer throws an error if a flush is done
+ between operations when removing or changing multiple items in mbox,
+ MMDF, or Babyl mailboxes.
+
+- Issue #14059: Implement multiprocessing.Barrier.
+
+- Issue #15061: The inappropriately named hmac.secure_compare has been
+ renamed to hmac.compare_digest, restricted to operating on bytes inputs
+ only and had its documentation updated to more accurately reflect both its
+ intent and its limitations
+
+- Issue #13841: Make child processes exit using sys.exit() on Windows.
+
+- Issue #14936: curses_panel was converted to PEP 3121 and PEP 384 API.
+ Patch by Robin Schreiber.
+
+- Issue #1667546: On platforms supporting tm_zone and tm_gmtoff fields
+ in struct tm, time.struct_time objects returned by time.gmtime(),
+ time.localtime() and time.strptime() functions now have tm_zone and
+ tm_gmtoff attributes. Original patch by Paul Boddie.
+
+- Rename adjusted attribute to adjustable in time.get_clock_info() result.
+
+- Issue #3518: Remove references to non-existent BaseManager.from_address()
+ method.
+
+- Issue #13857: Added textwrap.indent() function (initial patch by Ezra
+ Berch)
+
+- Issue #2736: Added datetime.timestamp() method.
+
+- Issue #13854: Make multiprocessing properly handle non-integer
+ non-string argument to SystemExit.
+
+- Issue #12157: Make pool.map() empty iterables correctly. Initial
+ patch by mouad.
+
+- Issue #11823: disassembly now shows argument counts on calls with keyword args.
+
+- Issue #14711: os.stat_float_times() has been deprecated.
+
+- LZMAFile now accepts the modes "rb"/"wb"/"ab" as synonyms of "r"/"w"/"a".
+
+- The bz2 and lzma modules now each contain an open() function, allowing
+ compressed files to readily be opened in text mode as well as binary mode.
+
+- BZ2File.__init__() and LZMAFile.__init__() now accept a file object as their
+ first argument, rather than requiring a separate "fileobj" argument.
+
+- gzip.open() now accepts file objects as well as filenames.
+
+- Issue #14992: os.makedirs(path, exist_ok=True) would raise an OSError
+ when the path existed and had the S_ISGID mode bit set when it was
+ not explicitly asked for. This is no longer an exception as mkdir
+ cannot control if the OS sets that bit for it or not.
+
+- Issue #14989: Make the CGI enable option to http.server available via command
+ line.
+
+- Issue #14987: Add a missing import statement to inspect.
+
+- Issue #1079: email.header.decode_header now correctly parses all the examples
+ in RFC2047. There is a necessary visible behavior change: the leading and/or
+ trailing whitespace on ASCII parts is now preserved.
+
+- Issue #14969: Better handling of exception chaining in contextlib.ExitStack
+
+- Issue #14962: Update text coloring in IDLE shell window after changing
+ options. Patch by Roger Serwy.
+
+- Issue #14963: Convert contextlib.ExitStack.__exit__ to use an iterative
+ algorithm (Patch by Alon Horev)
+
+- Issue #14785: Add sys._debugmallocstats() to help debug low-level memory
+ allocation issues
+
+- Issue #14443: Ensure that .py files are byte-compiled with the correct Python
+ executable within bdist_rpm even on older versions of RPM
+
+C-API
+-----
+
+- Issue #13783: Inadvertent additions to the public C API in the PEP 380
+ implementation have either been removed or marked as private interfaces.
Extension Modules
-----------------
projects / python / commitdiff