189 lines
6.6 KiB
Plaintext
189 lines
6.6 KiB
Plaintext
+++++++++++
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Python News
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+++++++++++
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What's New in Python 3.4.0 Alpha 1?
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===================================
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*Relase date: XX-XXX-2014*
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Core and Builtins
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-----------------
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- Issue #14783: Improve int() docstring and switch docstrings for str(),
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range(), and slice() to use multi-line signatures.
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- Upgrade Unicode data (UCD) to version 6.2.
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- Issue #15379: Fix passing of non-BMP characters as integers for the charmap
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decoder (already working as unicode strings). Patch by Serhiy Storchaka.
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- Issue #15144: Fix possible integer overflow when handling pointers as integer
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values, by using `Py_uintptr_t` instead of `size_t`. Patch by Serhiy
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Storchaka.
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- Issue #15965: Explicitly cast `AT_FDCWD` as (int). Required on Solaris 10
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(which defines `AT_FDCWD` as ``0xffd19553``), harmless on other platforms.
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- Issue #15839: Convert SystemErrors in `super()` to RuntimeErrors.
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- Issue #15448: Buffered IO now frees the buffer when closed, instead
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of when deallocating.
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- Issue #15846: Fix SystemError which happened when using `ast.parse()` in an
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exception handler on code with syntax errors.
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- Issue #15897: zipimport.c doesn't check return value of fseek().
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Patch by Felipe Cruz.
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- Issue #15801: Make sure mappings passed to '%' formatting are actually
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subscriptable.
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Library
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-------
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- Issue #16114: The subprocess module no longer provides a misleading error
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message stating that args[0] did not exist when either the cwd or executable
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keyword arguments specified a path that did not exist.
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- Issue #16169: Fix ctypes.WinError()'s confusion between errno and winerror.
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- Issue #1492704: shutil.copyfile() raises a distinct SameFileError now if
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source and destination are the same file. Patch by Atsuo Ishimoto.
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- Issue #13896: Make shelf instances work with 'with' as context managers.
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Original patch by Filip Gruszczyński.
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- Issue #15417: Add support for csh and fish in venv activation scripts.
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- Issue #16123: IDLE - deprecate running without a subprocess.
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Patch by Roger Serwy.
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- Issue #16089: Allow ElementTree.TreeBuilder to work again with a non-Element
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element_factory (fixes a regression in SimpleTAL).
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- Issue #9650: List commonly used format codes in time.strftime and
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time.strptime docsttings. Original patch by Mike Hoy.
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- Issue #16034: Fix performance regressions in the new `bz2.BZ2File`
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implementation. Initial patch by Serhiy Storchaka.
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- `pty.spawn()` now returns the child process status returned by `os.waitpid()`.
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- Issue #15756: `subprocess.poll()` now properly handles `errno.ECHILD` to
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return a returncode of 0 when the child has already exited or cannot be waited
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on.
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- Issue #15323: Improve failure message of `Mock.assert_called_once_with()`.
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- Issue #16064: ``unittest -m`` claims executable is "python", not "python3".
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- Issue #12376: Pass on parameters in `TextTestResult.__init__()` super call.
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- Issue #15222: Insert blank line after each message in mbox mailboxes.
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- Issue #16013: Fix `csv.Reader` parsing issue with ending quote characters.
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Patch by Serhiy Storchaka.
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- Issue #15421: Fix an OverflowError in `Calendar.itermonthdates()` after
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`datetime.MAXYEAR`. Patch by Cédric Krier.
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- Issue #16112: platform.architecture does not correctly escape argument to
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/usr/bin/file. Patch by David Benjamin.
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- Issue #15970: `xml.etree.ElementTree` now serializes correctly the empty HTML
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elements 'meta' and 'param'.
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- Issue #15842: The `SocketIO.{readable,writable,seekable}` methods now raise
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ValueError when the file-like object is closed. Patch by Alessandro Moura.
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- Issue #15876: Fix a refleak in the `curses` module: window.encoding.
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- Issue #15881: Fix `atexit` hook in `multiprocessing`. Original patch by Chris
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McDonough.
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- Issue #15841: The readable(), writable() and seekable() methods of
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`io.BytesIO` and `io.StringIO` objects now raise ValueError when the object
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has been closed. Patch by Alessandro Moura.
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- Issue #16126: PyErr_Format format mismatch in _testcapimodule.c.
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Patch by Serhiy Storchaka.
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- Issue #15447: Use `subprocess.DEVNULL` in webbrowser, instead of opening
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`os.devnull` explicitly and leaving it open.
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- Issue #15509: `webbrowser.UnixBrowser` no longer passes empty arguments to
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Popen when ``%action`` substitutions produce empty strings.
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- Issue #12776, issue #11839: Call `argparse` type function (specified by
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add_argument) only once. Before, the type function was called twice in the
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case where the default was specified and the argument was given as well. This
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was especially problematic for the FileType type, as a default file would
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always be opened, even if a file argument was specified on the command line.
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- Issue #15906: Fix a regression in argparse caused by the preceding change,
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when ``action='append'``, ``type='str'`` and ``default=[]``.
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Extension Modules
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-----------------
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- Issue #16113: Added sha3 module based on the Keccak reference implementation
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3.2. The `hashlib` module has four additional hash algorithms: `sha3_224`,
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`sha3_256`, `sha3_384` and `sha3_512`. As part of the patch some common
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code was moved from _hashopenssl.c to hashlib.h.
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Tests
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-----
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- Issue #16115: Add some tests for the executable argument to
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subprocess.Popen(). Initial patch by Kushal Das.
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- Issue #15304: Fix warning message when `os.chdir()` fails inside
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`test.support.temp_cwd()`. Patch by Chris Jerdonek.
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- Issue #15802: Fix test logic in `TestMaildir.test_create_tmp()`. Patch by
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Serhiy Storchaka.
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- Issue #15557: Added a test suite for the webbrowser module, thanks to Anton
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Barkovsky.
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Build
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-----
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- Issue #15923: Fix a mistake in ``asdl_c.py`` that resulted in a TypeError
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after 2801bf875a24 (see #15801).
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- Issue #16135: Remove OS/2 support.
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- Issue #15819: Make sure we can build Python out-of-tree from a readonly source
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directory. (Somewhat related to Issue #9860.)
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Documentation
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-------------
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- Issue #16115: Improve subprocess.Popen() documentation around args, shell,
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and executable arguments.
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- Issue #13498: Clarify docs of os.makedirs()'s exist_ok argument. Done with
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great native-speaker help from R. David Murray.
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- Issue #15533: Clarify docs and add tests for `subprocess.Popen()`'s cwd
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argument.
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- Issue #15979: Improve timeit documentation.
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- Issue #16036: Improve documentation of built-in `int()`'s signature and
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arguments.
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- Issue #15935: Clarification of `argparse` docs, re: add_argument() type and
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default arguments. Patch contributed by Chris Jerdonek.
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- Issue #11964: Document a change in v3.2 to the behavior of the indent
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parameter of json encoding operations.
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Tools/Demos
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-----------
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**(For information about older versions, consult the HISTORY file.)**
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