- Issue #18603: Ensure that PyOS_mystricmp and PyOS_mystrnicmp are in the
Python executable and not removed by the linker's optimizer.
-- Issue #19279: UTF-7 decoder no more produces illegal strings.
+- Issue #19306: Add extra hints to the faulthandler module's stack
+ dumps that these are "upside down".
-- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
- least one place so as to avoid regressions.
+Library
+-------
-- Issue #19014: memoryview.cast() is now allowed on zero-length views.
+- Issue #19330: the unnecessary wrapper functions have been removed from the
+ implementations of the new contextlib.redirect_stdout and
+ contextlib.suppress context managers, which also ensures they provide
+ reasonable help() output on instances
-- Issue #19098: Prevent overflow in the compiler when the recursion limit is set
- absurdly high.
++- Issue #19393: Fix symtable.symtable function to not be confused when there are
++ functions or classes named "top".
+
-- Issue #18942: sys._debugmallocstats() output was damaged on Windows.
+- Issue #18685: Restore re performance to pre-PEP 393 levels.
-- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions.
+- Issue #19339: telnetlib module is now using time.monotonic() when available
+ to compute timeout.
-- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc()
- fails.
+- Issue #19399: fix sporadic test_subprocess failure.
-- Issue #16741: Fix an error reporting in int().
+- Issue #13234: Fix os.listdir to work with extended paths on Windows.
+ Patch by Santoso Wijaya.
-- Issue #17899: Fix rare file descriptor leak in os.listdir().
+- Issue #19375: The site module adding a "site-python" directory to sys.path,
+ if it exists, is now deprecated.
-- Issue #18552: Check return value of PyArena_AddPyObject() in
- obj2ast_object().
+- Issue #19379: Lazily import linecache in the warnings module, to make
+ startup with warnings faster until a warning gets printed.
-- Issue #18560: Fix potential NULL pointer dereference in sum().
+- Issue #19288: Fixed the "in" operator of dbm.gnu databases for string
+ argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
-- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0],
- prefix and exec_prefix if the operation system does not obey MAXPATHLEN.
+- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string
+ argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
-- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().
+- Issue #19327: Fixed the working of regular expressions with too big charset.
-- Issue #17872: Fix a segfault in marshal.load() when input stream returns
- more bytes than requested.
+- Issue #17400: New 'is_global' attribute for ipaddress to tell if an address
+ is allocated by IANA for global or private networks.
-- Issue #18426: Fix NULL pointer dereference in C extension import when
- PyModule_GetDef() returns an error.
+- Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin
+ Williams.
-- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the
- tstate is first removed from TLS and then deallocated.
+- Issue #19365: Optimized the parsing of long replacement string in re.sub*()
+ functions.
-- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise
- OverflowError when an argument of %c format is out of range.
+- Issue #19352: Fix unittest discovery when a module can be reached
+ through several paths (e.g. under Debian/Ubuntu with virtualenv).
-- Issue #18137: Detect integer overflow on precision in float.__format__()
- and complex.__format__().
+- Issue #15207: Fix mimetypes to read from correct part of Windows registry
+ Original patch by Dave Chambers
-- Issue #18183: Fix various unicode operations on strings with large unicode
- codepoints.
+- Issue #16595: Add prlimit() to resource module.
-- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows().
+- Issue #19324: Expose Linux-specific constants in resource module.
-- Issue #18038: SyntaxError raised during compilation sources with illegal
- encoding now always contains an encoding name.
+- Issue #17400: ipaddress should make it easy to identify rfc6598 addresses.
-- Issue #17644: Fix a crash in str.format when curly braces are used in square
- brackets.
+- Load SSL's error strings in hashlib.
-- Issue #17983: Raise a SyntaxError for a ``global __class__`` statement in a
- class body.
+- Issue #18527: Upgrade internal copy of zlib to 1.2.8.
-- Issue #17927: Frame objects kept arguments alive if they had been copied into
- a cell, even if the cell was cleared.
+- Issue #19274: Add a filterfunc parameter to PyZipFile.writepy.
-Library
--------
+- Issue #8964: fix platform._sys_version to handle IronPython 2.6+.
+ Patch by Martin Matusiak.
-- Issue #19393: Fix symtable.symtable function to not be confused when there are
- functions or classes named "top".
+- Issue #18958: Improve error message for json.load(s) while passing a string
+ that starts with a UTF-8 BOM.
-- Issue #19339: telnetlib module is now using time.monotonic() when available
- to compute timeout.
+- Issue #19307: Improve error message for json.load(s) while passing objects
+ of the wrong type.
-- Issue #19288: Fixed the "in" operator of dbm.gnu databases for string
- argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
+- Issue #16038: CVE-2013-1752: ftplib: Limit amount of data read by
+ limiting the call to readline(). Original patch by Michał
+ Jastrzębski and Giampaolo Rodola.
-- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string
- argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
+- Issue #17087: Improved the repr for regular expression match objects.
-- Issue #19327: Fixed the working of regular expressions with too big charset.
+Tests
+-----
-- Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin
- Williams.
+- Issue 19384: Fix test_py_compile for root user, patch by Claudiu Popa.
-- Issue #19352: Fix unittest discovery when a module can be reached
- through several paths (e.g. under Debian/Ubuntu with virtualenv).
+Build
+-----
-- Issue #15207: Fix mimetypes to read from correct part of Windows registry
- Original patch by Dave Chambers
+- Issue #19356: Avoid using a C variabled named "_self", it's a reserved
+ word in some C compilers.
-- Issue #8964: fix platform._sys_version to handle IronPython 2.6+.
- Patch by Martin Matusiak.
-- Issue #16038: CVE-2013-1752: ftplib: Limit amount of data read by
- limiting the call to readline(). Original patch by Michał
- Jastrzębski and Giampaolo Rodola.
+What's New in Python 3.4.0 Alpha 4?
+===================================
+
+Release date: 2013-10-20
+
+Core and Builtins
+-----------------
+
+- Issue #19301: Give classes and functions that are explicitly marked global a
+ global qualname.
+
+- Issue #19279: UTF-7 decoder no longer produces illegal strings.
+
+- Issue #16612: Add "Argument Clinic", a compile-time preprocessor for
+ C files to generate argument parsing code. (See PEP 436.)
+
+- Issue #18810: Shift stat calls in importlib.machinery.FileFinder such that
+ the code is optimistic that if something exists in a directory named exactly
+ like the possible package being searched for that it's in actuality a
+ directory.
+
+- Issue #18416: importlib.machinery.PathFinder now treats '' as the cwd and
+ importlib.machinery.FileFinder no longer special-cases '' to '.'. This leads
+ to modules imported from cwd to now possess an absolute file path for
+ __file__ (this does not affect modules specified by path on the CLI but it
+ does affect -m/runpy). It also allows FileFinder to be more consistent by not
+ having an edge case.
+
+- Issue #4555: All exported C symbols are now prefixed with either
+ "Py" or "_Py".
+
+- Issue #19219: Speed up marshal.loads(), and make pyc files slightly
+ (5% to 10%) smaller.
+
+- Issue #19221: Upgrade Unicode database to version 6.3.0.
+
+- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must
+ now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL
+ if an error occurred), instead of a string allocated by PyMem_Malloc() or
+ PyMem_Realloc().
+
+- Issue #19199: Remove ``PyThreadState.tick_counter`` field
+
+- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
+ least one place so as to avoid regressions.
+
+- Issue #19087: Improve bytearray allocation in order to allow cheap popping
+ of data at the front (slice deletion).
+
+- Issue #19014: memoryview.cast() is now allowed on zero-length views.
+
+- Issue #18690: memoryview is now automatically registered with
+ collections.abc.Sequence
+
+- Issue #19078: memoryview now correctly supports the reversed builtin
+ (Patch by Claudiu Popa)
+
+Library
+-------
- Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX.
Patch by David Edelsohn.
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