From: Guido van Rossum Date: Thu, 19 May 2016 20:10:20 +0000 (-0700) Subject: Back out pathlib.Path.path attr. (Merge 3.4->3.5) X-Git-Tag: v3.5.2rc1~135 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=387e6e38175b853741c4f35e08791f0990bc0845;p=thirdparty%2FPython%2Fcpython.git Back out pathlib.Path.path attr. (Merge 3.4->3.5) --- 387e6e38175b853741c4f35e08791f0990bc0845 diff --cc Misc/NEWS index d42f1e804b8e,86ef3d762f8d..303563f61327 --- a/Misc/NEWS +++ b/Misc/NEWS @@@ -108,840 -71,625 +108,834 @@@ Core and Builtin __bytes__, __trunc__, and __float__ returning instances of subclasses of bytes, int, and float to subclasses of bytes, int, and float correspondingly. -- Issue #25388: Fixed tokenizer crash when processing undecodable source code - with a null byte. +- Issue #26478: Fix semantic bugs when using binary operators with dictionary + views and tuples. -- Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now - rejects builtin types with not defined __new__. +- Issue #26171: Fix possible integer overflow and heap corruption in + zipimporter.get_data(). -- Issue #24802: Avoid buffer overreads when int(), float(), compile(), exec() - and eval() are passed bytes-like objects. These objects are not - necessarily terminated by a null byte, but the functions assumed they were. +- Issue #25660: Fix TAB key behaviour in REPL with readline. -- Issue #24402: Fix input() to prompt to the redirected stdout when - sys.stdout.fileno() fails. +- Issue #25887: Raise a RuntimeError when a coroutine object is awaited + more than once. -- Issue #24806: Prevent builtin types that are not allowed to be subclassed from - being subclassed through multiple inheritance. -- Issue #24848: Fixed a number of bugs in UTF-7 decoding of misformed data. +Library +------- -- Issue #25280: Import trace messages emitted in verbose (-v) mode are no - longer formatted twice. +- Issue #27057: Fix os.set_inheritable() on Android, ioctl() is blocked by + SELinux and fails with EACCESS. The function now falls back to fcntl(). + Patch written by Michał Bednarski. -- Issue #25003: os.urandom() doesn't use getentropy() on Solaris because - getentropy() is blocking, whereas os.urandom() should not block. getentropy() - is supported since Solaris 11.3. +- Issue #27014: Fix infinite recursion using typing.py. Thanks to Kalle Tuure! -- Issue #25182: The stdprinter (used as sys.stderr before the io module is - imported at startup) now uses the backslashreplace error handler. +- Issue #14132: Fix urllib.request redirect handling when the target only has + a query string. Original fix by Ján Janech. -- Issue #24891: Fix a race condition at Python startup if the file descriptor - of stdin (0), stdout (1) or stderr (2) is closed while Python is creating - sys.stdin, sys.stdout and sys.stderr objects. These attributes are now set - to None if the creation of the object failed, instead of raising an OSError - exception. Initial patch written by Marco Paolini. +- Issue #17214: The "urllib.request" module now percent-encodes non-ASCII + bytes found in redirect target URLs. Some servers send Location header + fields with non-ASCII bytes, but "http.client" requires the request target + to be ASCII-encodable, otherwise a UnicodeEncodeError is raised. Based on + patch by Christian Heimes. -- Issue #21167: NAN operations are now handled correctly when python is - compiled with ICC even if -fp-model strict is not specified. +- Issue #26892: Honor debuglevel flag in urllib.request.HTTPHandler. Patch + contributed by Chi Hsuan Yen. -- Issue #4395: Better testing and documentation of binary operators. - Patch by Martin Panter. +- Issue #22274: In the subprocess module, allow stderr to be redirected to + stdout even when stdout is not redirected. Patch by Akira Li. -- Issue #24467: Fixed possible buffer over-read in bytearray. The bytearray - object now always allocates place for trailing null byte and it's buffer now - is always null-terminated. +- Issue #26807: mock_open 'files' no longer error on readline at end of file. + Patch from Yolanda Robla. -- Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(), - PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains() - to check for and handle errors correctly. +- Issue #25745: Fixed leaking a userptr in curses panel destructor. -- Issue #24257: Fixed system error in the comparison of faked - types.SimpleNamespace. +- Issue #26977: Removed unnecessary, and ignored, call to sum of squares helper + in statistics.pvariance. -- Issue #22939: Fixed integer overflow in iterator object. Patch by - Clement Rouault. +- Issue #26881: The modulefinder module now supports extended opcode arguments. -- Issue #23985: Fix a possible buffer overrun when deleting a slice from - the front of a bytearray and then appending some other bytes data. +- Issue #23815: Fixed crashes related to directly created instances of types in + _tkinter and curses.panel modules. -- Issue #24102: Fixed exception type checking in standard error handlers. +- Issue #17765: weakref.ref() no longer silently ignores keyword arguments. + Patch by Georg Brandl. -- Issue #23757: PySequence_Tuple() incorrectly called the concrete list API - when the data was a list subclass. +- Issue #26873: xmlrpc now raises ResponseError on unsupported type tags + instead of silently return incorrect result. -- Issue #24407: Fix crash when dict is mutated while being updated. +- Issue #26711: Fixed the comparison of plistlib.Data with other types. -- Issue #24096: Make warnings.warn_explicit more robust against mutation of the - warnings.filters list. +- Issue #24114: Fix an uninitialized variable in `ctypes.util`. -- Issue #23996: Avoid a crash when a delegated generator raises an - unnormalized StopIteration exception. Patch by Stefan Behnel. + The bug only occurs on SunOS when the ctypes implementation searches + for the `crle` program. Patch by Xiang Zhang. Tested on SunOS by + Kees Bos. -- Issue #24022: Fix tokenizer crash when processing undecodable source code. +- Issue #26864: In urllib.request, change the proxy bypass host checking + against no_proxy to be case-insensitive, and to not match unrelated host + names that happen to have a bypassed hostname as a suffix. Patch by Xiang + Zhang. -- Issue #23309: Avoid a deadlock at shutdown if a daemon thread is aborted - while it is holding a lock to a buffered I/O object, and the main thread - tries to use the same I/O object (typically stdout or stderr). A fatal - error is emitted instead. +- Issue #26634: recursive_repr() now sets __qualname__ of wrapper. Patch by + Xiang Zhang. -- Issue #22977: Fixed formatting Windows error messages on Wine. - Patch by Martin Panter. +- Issue #26804: urllib.request will prefer lower_case proxy environment + variables over UPPER_CASE or Mixed_Case ones. Patch contributed by Hans-Peter + Jansen. -- Issue #23803: Fixed str.partition() and str.rpartition() when a separator - is wider then partitioned string. +- Issue #26837: assertSequenceEqual() now correctly outputs non-stringified + differing items (like bytes in the -b mode). This affects assertListEqual() + and assertTupleEqual(). -- Issue #23192: Fixed generator lambdas. Patch by Bruno Cauet. +- Issue #26041: Remove "will be removed in Python 3.7" from deprecation + messages of platform.dist() and platform.linux_distribution(). + Patch by Kumaripaba Miyurusara Athukorala. -- Issue #23629: Fix the default __sizeof__ implementation for variable-sized - objects. +- Issue #26822: itemgetter, attrgetter and methodcaller objects no longer + silently ignore keyword arguments. -- Issue #24044: Fix possible null pointer dereference in list.sort in out of - memory conditions. +- Issue #26733: Disassembling a class now disassembles class and static methods. + Patch by Xiang Zhang. -- Issue #21354: PyCFunction_New function is exposed by python DLL again. +- Issue #26801: Fix error handling in :func:`shutil.get_terminal_size`, catch + :exc:`AttributeError` instead of :exc:`NameError`. Patch written by Emanuel + Barry. -Library -------- +- Issue #24838: tarfile's ustar and gnu formats now correctly calculate name + and link field limits for multibyte character encodings like utf-8. -- Issue #24903: Fix regression in number of arguments compileall accepts when - '-d' is specified. The check on the number of arguments has been dropped - completely as it never worked correctly anyway. +- Issue #26657: Fix directory traversal vulnerability with http.server on + Windows. This fixes a regression that was introduced in 3.3.4rc1 and + 3.4.0rc1. Based on patch by Philipp Hagemeister. -- Issue #25764: In the subprocess module, preserve any exception caused by - fork() failure when preexec_fn is used. +- Issue #26717: Stop encoding Latin-1-ized WSGI paths with UTF-8. Patch by + Anthony Sottile. -- Issue #6478: _strptime's regexp cache now is reset after changing timezone - with time.tzset(). +- Issue #26735: Fix :func:`os.urandom` on Solaris 11.3 and newer when reading + more than 1,024 bytes: call ``getrandom()`` multiple times with a limit of + 1024 bytes per call. -- Issue #25177: Fixed problem with the mean of very small and very large - numbers. As a side effect, statistics.mean and statistics.variance should - be significantly faster. +- Issue #16329: Add .webm to mimetypes.types_map. Patch by Giampaolo Rodola'. -- Issue #25718: Fixed copying object with state with boolean value is false. +- Issue #13952: Add .csv to mimetypes.types_map. Patch by Geoff Wilson. -- Issue #10131: Fixed deep copying of minidom documents. Based on patch - by Marian Ganisin. +- Issue #26709: Fixed Y2038 problem in loading binary PLists. -- Issue #25725: Fixed a reference leak in pickle.loads() when unpickling - invalid data including tuple instructions. +- Issue #23735: Handle terminal resizing with Readline 6.3+ by installing our + own SIGWINCH handler. Patch by Eric Price. -- Issue #25663: In the Readline completer, avoid listing duplicate global - names, and search the global namespace before searching builtins. +- Issue #26586: In http.server, respond with "413 Request header fields too + large" if there are too many header fields to parse, rather than killing + the connection and raising an unhandled exception. Patch by Xiang Zhang. -- Issue #25688: Fixed file leak in ElementTree.iterparse() raising an error. +- Issue #22854: Change BufferedReader.writable() and + BufferedWriter.readable() to always return False. -- Issue #23914: Fixed SystemError raised by unpickler on broken pickle data. +- Issue #25195: Fix a regression in mock.MagicMock. _Call is a subclass of + tuple (changeset 3603bae63c13 only works for classes) so we need to + implement __ne__ ourselves. Patch by Andrew Plummer. -- Issue #25691: Fixed crash on deleting ElementTree.Element attributes. +- Issue #26644: Raise ValueError rather than SystemError when a negative + length is passed to SSLSocket.recv() or read(). -- Issue #25624: ZipFile now always writes a ZIP_STORED header for directory - entries. Patch by Dingyuan Wang. +- Issue #23804: Fix SSL recv(0) and read(0) methods to return zero bytes + instead of up to 1024. -- Issue #25583: Avoid incorrect errors raised by os.makedirs(exist_ok=True) - when the OS gives priority to errors such as EACCES over EEXIST. +- Issue #26616: Fixed a bug in datetime.astimezone() method. -- Issue #25593: Change semantics of EventLoop.stop() in asyncio. +- Issue #21925: :func:`warnings.formatwarning` now catches exceptions on + ``linecache.getline(...)`` to be able to log :exc:`ResourceWarning` emitted + late during the Python shutdown process. -- Issue #6973: When we know a subprocess.Popen process has died, do - not allow the send_signal(), terminate(), or kill() methods to do - anything as they could potentially signal a different process. +- Issue #24266: Ctrl+C during Readline history search now cancels the search + mode when compiled with Readline 7. -- Issue #25578: Fix (another) memory leak in SSLSocket.getpeercer(). +- Issue #26560: Avoid potential ValueError in BaseHandler.start_response. + Initial patch by Peter Inglesby. -- Issue #25590: In the Readline completer, only call getattr() once per - attribute. +- Issue #26313: ssl.py _load_windows_store_certs fails if windows cert store + is empty. Patch by Baji. -- Issue #25498: Fix a crash when garbage-collecting ctypes objects created - by wrapping a memoryview. This was a regression made in 3.4.3. Based - on patch by Eryksun. +- Issue #26569: Fix :func:`pyclbr.readmodule` and :func:`pyclbr.readmodule_ex` + to support importing packages. -- Issue #18010: Fix the pydoc web server's module search function to handle - exceptions from importing packages. +- Issue #26499: Account for remaining Content-Length in + HTTPResponse.readline() and read1(). Based on patch by Silent Ghost. + Also document that HTTPResponse now supports these methods. -- Issue #25510: fileinput.FileInput.readline() now returns b'' instead of '' - at the end if the FileInput was opened with binary mode. - Patch by Ryosuke Ito. +- Issue #25320: Handle sockets in directories unittest discovery is scanning. + Patch from Victor van den Elzen. -- Issue #25530: Disable the vulnerable SSLv3 protocol by default when creating - ssl.SSLContext. +- Issue #16181: cookiejar.http2time() now returns None if year is higher than + datetime.MAXYEAR. -- Issue #25569: Fix memory leak in SSLSocket.getpeercert(). +- Issue #26513: Fixes platform module detection of Windows Server -- Issue #21827: Fixed textwrap.dedent() for the case when largest common - whitespace is a substring of smallest leading whitespace. - Based on patch by Robert Li. +- Issue #23718: Fixed parsing time in week 0 before Jan 1. Original patch by + Tamás Bence Gedai. -- Issue #25471: Sockets returned from accept() shouldn't appear to be - nonblocking. +- Issue #20589: Invoking Path.owner() and Path.group() on Windows now raise + NotImplementedError instead of ImportError. -- Issue #25441: asyncio: Raise error from drain() when socket is closed. +- Issue #26177: Fixed the keys() method for Canvas and Scrollbar widgets. -- Issue #25411: Improved Unicode support in SMTPHandler through better use of - the email package. Thanks to user simon04 for the patch. +- Issue #15068: Got rid of excessive buffering in the fileinput module. + The bufsize parameter is no longer used. -- Issue #25380: Fixed protocol for the STACK_GLOBAL opcode in - pickletools.opcodes. +- Issue #2202: Fix UnboundLocalError in + AbstractDigestAuthHandler.get_algorithm_impls. Initial patch by Mathieu Dupuy. -- Issue #23972: Updates asyncio datagram create method allowing reuseport - and reuseaddr socket options to be set prior to binding the socket. - Mirroring the existing asyncio create_server method the reuseaddr option - for datagram sockets defaults to True if the O/S is 'posix' (except if the - platform is Cygwin). Patch by Chris Laws. +- Issue #25718: Fixed pickling and copying the accumulate() iterator with + total is None. -- Issue #25304: Add asyncio.run_coroutine_threadsafe(). This lets you - submit a coroutine to a loop from another thread, returning a - concurrent.futures.Future. By Vincent Michel. +- Issue #26475: Fixed debugging output for regular expressions with the (?x) + flag. -- Issue #25319: When threading.Event is reinitialized, the underlying condition - should use a regular lock rather than a recursive lock. +- Issue #26457: Fixed the subnets() methods in IP network classes for the case + when resulting prefix length is equal to maximal prefix length. + Based on patch by Xiang Zhang. -- Issue #25232: Fix CGIRequestHandler to split the query from the URL at the - first question mark (?) rather than the last. Patch from Xiang Zhang. +- Issue #26385: Remove the file if the internal open() call in + NamedTemporaryFile() fails. Patch by Silent Ghost. -- Issue #24657: Prevent CGIRequestHandler from collapsing slashes in the - query part of the URL as if it were a path. Patch from Xiang Zhang. +- Issue #26402: Fix XML-RPC client to retry when the server shuts down a + persistent connection. This was a regression related to the new + http.client.RemoteDisconnected exception in 3.5.0a4. -- Issue #22958: Constructor and update method of weakref.WeakValueDictionary - now accept the self and the dict keyword arguments. +- Issue #25913: Leading ``<~`` is optional now in base64.a85decode() with + adobe=True. Patch by Swati Jaiswal. -- Issue #22609: Constructor of collections.UserDict now accepts the self keyword - argument. +- Issue #26186: Remove an invalid type check in importlib.util.LazyLoader. -- Issue #25262. Added support for BINBYTES8 opcode in Python implementation of - unpickler. Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8 - opcodes no longer silently ignored on 32-bit platforms in C implementation. +- Issue #26367: importlib.__import__() raises SystemError like + builtins.__import__() when ``level`` is specified but without an accompanying + package specified. -- Issue #25034: Fix string.Formatter problem with auto-numbering and - nested format_specs. Patch by Anthon van der Neut. +- Issue #26309: In the "socketserver" module, shut down the request (closing + the connected socket) when verify_request() returns false. Patch by Aviv + Palivoda. -- Issue #25233: Rewrite the guts of asyncio.Queue and - asyncio.Semaphore to be more understandable and correct. +- Issue #25939: On Windows open the cert store readonly in ssl.enum_certificates. -- Issue #23600: Default implementation of tzinfo.fromutc() was returning - wrong results in some cases. +- Issue #25995: os.walk() no longer uses FDs proportional to the tree depth. -- Issue #25203: Failed readline.set_completer_delims() no longer left the - module in inconsistent state. +- Issue #26117: The os.scandir() iterator now closes file descriptor not only + when the iteration is finished, but when it was failed with error. -- Prevent overflow in _Unpickler_Read. +- Issue #25911: Restored support of bytes paths in os.walk() on Windows. -- Issue #25047: The XML encoding declaration written by Element Tree now - respects the letter case given by the user. This restores the ability to - write encoding names in uppercase like "UTF-8", which worked in Python 2. +- Issue #26045: Add UTF-8 suggestion to error message when posting a + non-Latin-1 string with http.client. -- Issue #19143: platform module now reads Windows version from kernel32.dll to - avoid compatibility shims. +- Issue #12923: Reset FancyURLopener's redirect counter even if there is an + exception. Based on patches by Brian Brazil and Daniel Rocco. -- Issue #23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methods - of datetime.datetime: microseconds are now rounded to nearest with ties - going to nearest even integer (ROUND_HALF_EVEN), instead of being rounding - towards zero (ROUND_DOWN). It's important that these methods use the same - rounding mode than datetime.timedelta to keep the property: - (datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t). - It also the rounding mode used by round(float) for example. +- Issue #25945: Fixed a crash when unpickle the functools.partial object with + wrong state. Fixed a leak in failed functools.partial constructor. + "args" and "keywords" attributes of functools.partial have now always types + tuple and dict correspondingly. -- Issue #24684: socket.socket.getaddrinfo() now calls - PyUnicode_AsEncodedString() instead of calling the encode() method of the - host, to handle correctly custom string with an encode() method which doesn't - return a byte string. The encoder of the IDNA codec is now called directly - instead of calling the encode() method of the string. +- Issue #26202: copy.deepcopy() now correctly copies range() objects with + non-atomic attributes. -- Issue #24982: shutil.make_archive() with the "zip" format now adds entries - for directories (including empty directories) in ZIP file. +- Issue #23076: Path.glob() now raises a ValueError if it's called with an + invalid pattern. Patch by Thomas Nyberg. -- Issue #24857: Comparing call_args to a long sequence now correctly returns a - boolean result instead of raising an exception. Patch by A Kaptur. +- Issue #19883: Fixed possible integer overflows in zipimport. -- Issue #25019: Fixed a crash caused by setting non-string key of expat parser. - Based on patch by John Leitch. +- Issue #26227: On Windows, getnameinfo(), gethostbyaddr() and + gethostbyname_ex() functions of the socket module now decode the hostname + from the ANSI code page rather than UTF-8. -- Issue #24917: time_strftime() buffer over-read. +- Issue #26147: xmlrpc now works with strings not encodable with used + non-UTF-8 encoding. -- Issue #23144: Make sure that HTMLParser.feed() returns all the data, even - when convert_charrefs is True. +- Issue #25935: Garbage collector now breaks reference loops with OrderedDict. -- Issue #16180: Exit pdb if file has syntax error, instead of trapping user - in an infinite loop. Patch by Xavier de Gaye. +- Issue #16620: Fixed AttributeError in msilib.Directory.glob(). -- Issue #21112: Fix regression in unittest.expectedFailure on subclasses. - Patch from Berker Peksag. +- Issue #26013: Added compatibility with broken protocol 2 pickles created + in old Python 3 versions (3.4.3 and lower). -- Issue #24931: Instances of subclasses of namedtuples have their own __dict__ - which breaks the inherited __dict__ property and breaks the _asdict() method. - Removed the __dict__ property to prevent the conflict and fixed _asdict(). +- Issue #25850: Use cross-compilation by default for 64-bit Windows. -- Issue #24764: cgi.FieldStorage.read_multi() now ignores the Content-Length - header in part headers. Patch written by Peter Landry and reviewed by Pierre - Quentel. +- Issue #17633: Improve zipimport's support for namespace packages. -- Issue #24774: Fix docstring in http.server.test. Patch from Chiu-Hsiang Hsu. +- Issue #24705: Fix sysconfig._parse_makefile not expanding ${} vars + appearing before $() vars. -- Issue #21159: Improve message in configparser.InterpolationMissingOptionError. - Patch from Łukasz Langa. +- Issue #22138: Fix mock.patch behavior when patching descriptors. Restore + original values after patching. Patch contributed by Sean McCully. -- Issue #23888: Handle fractional time in cookie expiry. Patch by ssh. +- Issue #25672: In the ssl module, enable the SSL_MODE_RELEASE_BUFFERS mode + option if it is safe to do so. - - Issue #22570: Add 'path' attribute to pathlib.Path objects, - returning the same as str(), to make it more similar to DirEntry. - Library code can now write getattr(p, 'path', p) to get the path as - a string from a Path, a DirEntry, or a plain string. This is - essentially a small one-off protocol. - -- Issue #23004: mock_open() now reads binary data correctly when the type of - read_data is bytes. Initial patch by Aaron Hill. +- Issue #26012: Don't traverse into symlinks for ** pattern in + pathlib.Path.[r]glob(). -- Issue #23652: Make it possible to compile the select module against the - libc headers from the Linux Standard Base, which do not include some - EPOLL macros. Patch by Matt Frank. +- Issue #24120: Ignore PermissionError when traversing a tree with + pathlib.Path.[r]glob(). Patch by Ulrich Petri. -- Issue #22932: Fix timezones in email.utils.formatdate. - Patch from Dmitry Shachnev. +- Issue #25447: fileinput now uses sys.stdin as-is if it does not have a + buffer attribute (restores backward compatibility). -- Issue #23779: imaplib raises TypeError if authenticator tries to abort. - Patch from Craig Holmquist. +- Issue #25447: Copying the lru_cache() wrapper object now always works, + independedly from the type of the wrapped object (by returning the original + object unchanged). -- Issue #23319: Fix ctypes.BigEndianStructure, swap correctly bytes. Patch - written by Matthieu Gautier. +- Issue #24103: Fixed possible use after free in ElementTree.XMLPullParser. -- Issue #23254: Document how to close the TCPServer listening socket. - Patch from Martin Panter. +- Issue #25860: os.fwalk() no longer skips remaining directories when error + occurs. Original patch by Samson Lee. -- Issue #19450: Update Windows and OS X installer builds to use SQLite 3.8.11. +- Issue #25914: Fixed and simplified OrderedDict.__sizeof__. -- Issue #23441: rcompleter now prints a tab character instead of displaying - possible completions for an empty word. Initial patch by Martin Sekera. +- Issue #25902: Fixed various refcount issues in ElementTree iteration. -- Issue #24735: Fix invalid memory access in - itertools.combinations_with_replacement(). +- Issue #25717: Restore the previous behaviour of tolerating most fstat() + errors when opening files. This was a regression in 3.5a1, and stopped + anonymous temporary files from working in special cases. -- Issue #17527: Add PATCH to wsgiref.validator. Patch from Luca Sbardella. +- Issue #24903: Fix regression in number of arguments compileall accepts when + '-d' is specified. The check on the number of arguments has been dropped + completely as it never worked correctly anyway. -- Issue #24683: Fixed crashes in _json functions called with arguments of - inappropriate type. +- Issue #25764: In the subprocess module, preserve any exception caused by + fork() failure when preexec_fn is used. -- Issue #21697: shutil.copytree() now correctly handles symbolic links that - point to directories. Patch by Eduardo Seabra and Thomas Kluyver. +- Issue #6478: _strptime's regexp cache now is reset after changing timezone + with time.tzset(). -- Issue #24620: Random.setstate() now validates the value of state last element. +- Issue #14285: When executing a package with the "python -m package" option, + and package initialization fails, a proper traceback is now reported. The + "runpy" module now lets exceptions from package initialization pass back to + the caller, rather than raising ImportError. -- Issue #22153: Improve unittest docs. Patch from Martin Panter and evilzero. +- Issue #19771: Also in runpy and the "-m" option, omit the irrelevant + message ". . . is a package and cannot be directly executed" if the package + could not even be initialized (e.g. due to a bad ``*.pyc`` file). -- Issue #24206: Fixed __eq__ and __ne__ methods of inspect classes. +- Issue #25177: Fixed problem with the mean of very small and very large + numbers. As a side effect, statistics.mean and statistics.variance should + be significantly faster. -- Issue #21750: mock_open.read_data can now be read from each instance, as it - could in Python 3.3. +- Issue #25718: Fixed copying object with state with boolean value is false. -- Issue #23247: Fix a crash in the StreamWriter.reset() of CJK codecs. +- Issue #10131: Fixed deep copying of minidom documents. Based on patch + by Marian Ganisin. -- Issue #18622: unittest.mock.mock_open().reset_mock would recurse infinitely. - Patch from Nicola Palumbo and Laurent De Buyst. +- Issue #25725: Fixed a reference leak in pickle.loads() when unpickling + invalid data including tuple instructions. -- Issue #24608: chunk.Chunk.read() now always returns bytes, not str. +- Issue #25663: In the Readline completer, avoid listing duplicate global + names, and search the global namespace before searching builtins. -- Issue #18684: Fixed reading out of the buffer in the re module. +- Issue #25688: Fixed file leak in ElementTree.iterparse() raising an error. -- Issue #24259: tarfile now raises a ReadError if an archive is truncated - inside a data segment. +- Issue #23914: Fixed SystemError raised by unpickler on broken pickle data. -- Issue #24552: Fix use after free in an error case of the _pickle module. +- Issue #25691: Fixed crash on deleting ElementTree.Element attributes. -- Issue #24514: tarfile now tolerates number fields consisting of only - whitespace. +- Issue #25624: ZipFile now always writes a ZIP_STORED header for directory + entries. Patch by Dingyuan Wang. -- Issue #19176: Fixed doctype() related bugs in C implementation of ElementTree. - A deprecation warning no longer issued by XMLParser subclass with default - doctype() method. Direct call of doctype() now issues a warning. Parser's - doctype() now is not called if target's doctype() is called. Based on patch - by Martin Panter. +- Skip getaddrinfo if host is already resolved. + Patch by A. Jesse Jiryu Davis. -- Issue #20387: Restore semantic round-trip correctness in tokenize/untokenize - for tab-indented blocks. +- Add asyncio.timeout() context manager. -- Issue #24456: Fixed possible buffer over-read in adpcm2lin() and lin2adpcm() - functions of the audioop module. +- Issue #26050: Add asyncio.StreamReader.readuntil() method. + Patch by Марк Коренберг. -- Issue #24336: The contextmanager decorator now works with functions with - keyword arguments called "func" and "self". Patch by Martin Panter. +- Issue #25924: Avoid unnecessary serialization of getaddrinfo(3) calls on + OS X versions 10.5 or higher. Original patch by A. Jesse Jiryu Davis. -- Issue #24489: ensure a previously set C errno doesn't disturb cmath.polar(). +- Issue #26406: Avoid unnecessary serialization of getaddrinfo(3) calls on + current versions of OpenBSD and NetBSD. Patch by A. Jesse Jiryu Davis. -- Issue #5633: Fixed timeit when the statement is a string and the setup is not. +- Issue #26848: Fix asyncio/subprocess.communicate() to handle empty input. + Patch by Jack O'Connor. -- Issue #24326: Fixed audioop.ratecv() with non-default weightB argument. - Original patch by David Moore. +- Issue #27040: Add loop.get_exception_handler method -- Issue #23840: tokenize.open() now closes the temporary binary file on error - to fix a resource warning. +- Issue #27041: asyncio: Add loop.create_future method -- Issue #24257: Fixed segmentation fault in sqlite3.Row constructor with faked - cursor type. +Documentation +------------- -- Issue #22107: tempfile.gettempdir() and tempfile.mkdtemp() now try again - when a directory with the chosen name already exists on Windows as well as - on Unix. tempfile.mkstemp() now fails early if parent directory is not - valid (not exists or is a file) on Windows. +- Issue #26736: Used HTTPS for external links in the documentation if possible. -- Issue #6598: Increased time precision and random number range in - email.utils.make_msgid() to strengthen the uniqueness of the message ID. +- Issue #6953: Rework the Readline module documentation to group related + functions together, and add more details such as what underlying Readline + functions and variables are accessed. -- Issue #24091: Fixed various crashes in corner cases in C implementation of - ElementTree. +- Issue #23606: Adds note to ctypes documentation regarding cdll.msvcrt. -- Issue #21931: msilib.FCICreate() now raises TypeError in the case of a bad - argument instead of a ValueError with a bogus FCI error number. - Patch by Jeffrey Armstrong. +- Issue #25500: Fix documentation to not claim that __import__ is searched for + in the global scope. -- Issue #23796: peek and read1 methods of BufferedReader now raise ValueError - if they called on a closed object. Patch by John Hergenroeder. +Tests +----- -- Issue #24521: Fix possible integer overflows in the pickle module. +- Issue #26523: The multiprocessing thread pool (multiprocessing.dummy.Pool) + was untested. -- Issue #22931: Allow '[' and ']' in cookie values. +- Issue #26015: Added new tests for pickling iterators of mutable sequences. -- Issue #20274: Remove ignored and erroneous "kwargs" parameters from three - METH_VARARGS methods on _sqlite.Connection. +- Issue #26325: Added test.support.check_no_resource_warning() to check that + no ResourceWarning is emitted. -- Issue #24094: Fix possible crash in json.encode with poorly behaved dict - subclasses. +- Issue #25940: Changed test_ssl to use self-signed.pythontest.net. This + avoids relying on svn.python.org, which recently changed root certificate. -- Asyncio issue 222 / PR 231 (Victor Stinner) -- fix @coroutine - functions without __name__. +- Issue #25616: Tests for OrderedDict are extracted from test_collections + into separate file test_ordered_dict. -- Issue #9246: On POSIX, os.getcwd() now supports paths longer than 1025 bytes. - Patch written by William Orr. +- Issue #26583: Skip test_timestamp_overflow in test_import if bytecode + files cannot be written. -- The keywords attribute of functools.partial is now always a dictionary. +Build +----- -- Issues #24099, #24100, and #24101: Fix free-after-use bug in heapq's siftup - and siftdown functions. +- Issue #22359: Disable the rules for running _freeze_importlib and pgen when + cross-compiling. The output of these programs is normally saved with the + source code anyway, and is still regenerated when doing a native build. + Patch by Xavier de Gaye. -- Backport collections.deque fixes from Python 3.5. Prevents reentrant badness - during deletion by deferring the decref until the container has been restored - to a consistent state. +- Issue #21668: Link audioop, _datetime, _ctypes_test modules to libm, + except on Mac OS X. Patch written by Xavier de Gaye. -- Issue #23008: Fixed resolving attributes with boolean value is False in pydoc. +- Issue #25702: A --with-lto configure option has been added that will + enable link time optimizations at build time during a make profile-opt. + Some compilers and toolchains are known to not produce stable code when + using LTO, be sure to test things thoroughly before relying on it. + It can provide a few % speed up over profile-opt alone. -- Fix asyncio issue 235: LifoQueue and PriorityQueue's put didn't - increment unfinished tasks (this bug was introduced in 3.4.3 when - JoinableQueue was merged with Queue). +- Issue #26624: Adds validation of ucrtbase[d].dll version with warning + for old versions. -- Issue #23908: os functions now reject paths with embedded null character - on Windows instead of silently truncate them. +- Issue #17603: Avoid error about nonexistant fileblocks.o file by using a + lower-level check for st_blocks in struct stat. -- Issue #23728: binascii.crc_hqx() could return an integer outside of the range - 0-0xffff for empty data. +- Issue #26079: Fixing the build output folder for tix-8.4.3.6. Patch by + Bjoern Thiel. -- Issue #23811: Add missing newline to the PyCompileError error message. - Patch by Alex Shkop. +- Issue #26465: Update Windows builds to use OpenSSL 1.0.2g. -- Issue #17898: Fix exception in gettext.py when parsing certain plural forms. +- Issue #24421: Compile Modules/_math.c once, before building extensions. + Previously it could fail to compile properly if the math and cmath builds + were concurrent. -- Issue #22982: Improve BOM handling when seeking to multiple positions of - a writable text file. +- Issue #25348: Added ``--pgo`` and ``--pgo-job`` arguments to + ``PCbuild\build.bat`` for building with Profile-Guided Optimization. The + old ``PCbuild\build_pgo.bat`` script is now deprecated, and simply calls + ``PCbuild\build.bat --pgo %*``. -- Issue #23865: close() methods in multiple modules now are idempotent and more - robust at shutdown. If they need to release multiple resources, all are - released even if errors occur. +- Issue #25827: Add support for building with ICC to ``configure``, including + a new ``--with-icc`` flag. -- Issue #23881: urllib.request.ftpwrapper constructor now closes the socket if - the FTP connection failed to fix a ResourceWarning. +- Issue #25696: Fix installation of Python on UNIX with make -j9. -- Issue #23400: Raise same exception on both Python 2 and 3 if sem_open is not - available. Patch by Davin Potts. +- Issue #26465: Update OS X 10.5+ 32-bit-only installer to build + and link with OpenSSL 1.0.2g. -- Issue #15133: _tkinter.tkapp.getboolean() now supports Tcl_Obj and always - returns bool. tkinter.BooleanVar now validates input values (accepted bool, - int, str, and Tcl_Obj). tkinter.BooleanVar.get() now always returns bool. +- Issue #26268: Update Windows builds to use OpenSSL 1.0.2f. -- Issue #23338: Fixed formatting ctypes error messages on Cygwin. - Patch by Makoto Kato. +- Issue #25136: Support Apple Xcode 7's new textual SDK stub libraries. -- Issue #16840: Tkinter now supports 64-bit integers added in Tcl 8.4 and - arbitrary precision integers added in Tcl 8.5. +- Issue #24324: Do not enable unreachable code warnings when using + gcc as the option does not work correctly in older versions of gcc + and has been silently removed as of gcc-4.5. -- Issue #23834: Fix socket.sendto(), use the C Py_ssize_t type to store the - result of sendto() instead of the C int type. +Windows +------- -- Issue #21526: Tkinter now supports new boolean type in Tcl 8.5. +- Issue #27053: Updates make_zip.py to correctly generate library ZIP file. -- Issue #23838: linecache now clears the cache and returns an empty result on - MemoryError. +- Issue #26268: Update the prepare_ssl.py script to handle OpenSSL releases + that don't include the contents of the include directory (that is, 1.0.2e + and later). -- Issue #18473: Fixed 2to3 and 3to2 compatible pickle mappings. Fixed - ambigious reverse mappings. Added many new mappings. Import mapping is no - longer applied to modules already mapped with full name mapping. +- Issue #26071: bdist_wininst created binaries fail to start and find + 32bit Python -- Issue #23745: The new email header parser now handles duplicate MIME - parameter names without error, similar to how get_param behaves. +- Issue #26073: Update the list of magic numbers in launcher -- Issue #23792: Ignore KeyboardInterrupt when the pydoc pager is active. - This mimics the behavior of the standard unix pagers, and prevents - pipepager from shutting down while the pager itself is still running. +- Issue #26065: Excludes venv from library when generating embeddable + distro. -- Issue #23742: ntpath.expandvars() no longer loses unbalanced single quotes. +Tools/Demos +----------- -- Issue #21802: The reader in BufferedRWPair now is closed even when closing - writer failed in BufferedRWPair.close(). +- Issue #26799: Fix python-gdb.py: don't get C types once when the Python code + is loaded, but get C types on demand. The C types can change if + python-gdb.py is loaded before the Python executable. Patch written by Thomas + Ilsche. -- Issue #23671: string.Template now allows to specify the "self" parameter as - keyword argument. string.Formatter now allows to specify the "self" and - the "format_string" parameters as keyword arguments. +- Issue #26271: Fix the Freeze tool to properly use flags passed through + configure. Patch by Daniel Shaulov. -- Issue #21560: An attempt to write a data of wrong type no longer cause - GzipFile corruption. Original patch by Wolfgang Maier. +- Issue #26489: Add dictionary unpacking support to Tools/parser/unparse.py. + Patch by Guo Ci Teo. -- Issue #23647: Increase impalib's MAXLINE to accommodate modern mailbox sizes. +- Issue #26316: Fix variable name typo in Argument Clinic. -- Issue #23539: If body is None, http.client.HTTPConnection.request now sets - Content-Length to 0 for PUT, POST, and PATCH headers to avoid 411 errors from - some web servers. -- Issue #22351: The nntplib.NNTP constructor no longer leaves the connection - and socket open until the garbage collector cleans them up. Patch by - Martin Panter. +What's New in Python 3.5.1 final? +================================= -- Issue #23136: _strptime now uniformly handles all days in week 0, including - Dec 30 of previous year. Based on patch by Jim Carroll. +Release date: 2015-12-06 -- Issue #23700: Iterator of NamedTemporaryFile now keeps a reference to - NamedTemporaryFile instance. Patch by Bohuslav Kabrda. +Core and Builtins +----------------- -- Issue #22903: The fake test case created by unittest.loader when it fails - importing a test module is now picklable. +- Issue #25709: Fixed problem with in-place string concatenation and + utf-8 cache. -- Issue #23568: Add rdivmod support to MagicMock() objects. - Patch by Håkan Lövdahl. +Windows +------- -- Issue #23138: Fixed parsing cookies with absent keys or values in cookiejar. - Patch by Demian Brecht. +- Issue #25715: Python 3.5.1 installer shows wrong upgrade path and incorrect + logic for launcher detection. -- Issue #23051: multiprocessing.Pool methods imap() and imap_unordered() now - handle exceptions raised by an iterator. Patch by Alon Diamant and Davin - Potts. -- Issue #22928: Disabled HTTP header injections in http.client. - Original patch by Demian Brecht. +What's New in Python 3.5.1 release candidate 1? +=============================================== -- Issue #23615: Modules bz2, tarfile and tokenize now can be reloaded with - imp.reload(). Patch by Thomas Kluyver. +Release date: 2015-11-22 -- Issue #23476: In the ssl module, enable OpenSSL's X509_V_FLAG_TRUSTED_FIRST - flag on certificate stores when it is available. +Core and Builtins +----------------- -- Issue #23576: Avoid stalling in SSL reads when EOF has been reached in the - SSL layer but the underlying connection hasn't been closed. +- Issue #25630: Fix a possible segfault during argument parsing in functions + that accept filesystem paths. -- Issue #23504: Added an __all__ to the types module. +- Issue #23564: Fixed a partially broken sanity check in the _posixsubprocess + internals regarding how fds_to_pass were passed to the child. The bug had + no actual impact as subprocess.py already avoided it. -- Issue #20204: Added the __module__ attribute to _tkinter classes. +- Issue #25388: Fixed tokenizer crash when processing undecodable source code + with a null byte. -- Issue #23521: Corrected pure python implementation of timedelta division. +- Issue #25462: The hash of the key now is calculated only once in most + operations in C implementation of OrderedDict. - * Eliminated OverflowError from timedelta * float for some floats; - * Corrected rounding in timedlta true division. +- Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now + rejects builtin types with not defined __new__. -- Issue #21619: Popen objects no longer leave a zombie after exit in the with - statement if the pipe was broken. Patch by Martin Panter. +- Issue #25555: Fix parser and AST: fill lineno and col_offset of "arg" node + when compiling AST from Python objects. -- Issue #6639: Module-level turtle functions no longer raise TclError after - closing the window. +- Issue #24802: Avoid buffer overreads when int(), float(), compile(), exec() + and eval() are passed bytes-like objects. These objects are not + necessarily terminated by a null byte, but the functions assumed they were. -- Issues #814253, #9179: Warnings now are raised when group references and - conditional group references are used in lookbehind assertions in regular - expressions. +- Issue #24726: Fixed a crash and leaking NULL in repr() of OrderedDict that + was mutated by direct calls of dict methods. -- Issue #23215: Multibyte codecs with custom error handlers that ignores errors - consumed too much memory and raised SystemError or MemoryError. - Original patch by Aleksi Torhamo. +- Issue #25449: Iterating OrderedDict with keys with unstable hash now raises + KeyError in C implementations as well as in Python implementation. -- Issue #5700: io.FileIO() called flush() after closing the file. - flush() was not called in close() if closefd=False. +- Issue #25395: Fixed crash when highly nested OrderedDict structures were + garbage collected. -- Issue #23374: Fixed pydoc failure with non-ASCII files when stdout encoding - differs from file system encoding (e.g. on Mac OS). +- Issue #25274: sys.setrecursionlimit() now raises a RecursionError if the new + recursion limit is too low depending at the current recursion depth. Modify + also the "lower-water mark" formula to make it monotonic. This mark is used + to decide when the overflowed flag of the thread state is reset. -- Issue #23481: Remove RC4 from the SSL module's default cipher list. +- Issue #24402: Fix input() to prompt to the redirected stdout when + sys.stdout.fileno() fails. -- Issue #21548: Fix pydoc.synopsis() and pydoc.apropos() on modules with empty - docstrings. +- Issue #24806: Prevent builtin types that are not allowed to be subclassed from + being subclassed through multiple inheritance. -- Issue #22885: Fixed arbitrary code execution vulnerability in the dbm.dumb - module. Original patch by Claudiu Popa. +- Issue #24848: Fixed a number of bugs in UTF-7 decoding of misformed data. -- Issue #23146: Fix mishandling of absolute Windows paths with forward - slashes in pathlib. +- Issue #25280: Import trace messages emitted in verbose (-v) mode are no + longer formatted twice. -- Issue #23421: Fixed compression in tarfile CLI. Patch by wdv4758h. +- Issue #25003: On Solaris 11.3 or newer, os.urandom() now uses the + getrandom() function instead of the getentropy() function. The getentropy() + function is blocking to generate very good quality entropy, os.urandom() + doesn't need such high-quality entropy. -- Issue #23367: Fix possible overflows in the unicodedata module. +- Issue #25182: The stdprinter (used as sys.stderr before the io module is + imported at startup) now uses the backslashreplace error handler. -- Issue #23361: Fix possible overflow in Windows subprocess creation code. +- Issue #25131: Make the line number and column offset of set/dict literals and + comprehensions correspond to the opening brace. -- Issue #23801: Fix issue where cgi.FieldStorage did not always ignore the - entire preamble to a multipart body. +- Issue #25150: Hide the private _Py_atomic_xxx symbols from the public + Python.h header to fix a compilation error with OpenMP. PyThreadState_GET() + becomes an alias to PyThreadState_Get() to avoid ABI incompatibilies. -- Issue #23310: Fix MagicMock's initializer to work with __methods__, just - like configure_mock(). Patch by Kasia Jachim. +Library +------- -- asyncio: New event loop APIs: set_task_factory() and get_task_factory(). +- Issue #25626: Change three zlib functions to accept sizes that fit in + Py_ssize_t, but internally cap those sizes to UINT_MAX. This resolves a + regression in 3.5 where GzipFile.read() failed to read chunks larger than 2 + or 4 GiB. The change affects the zlib.Decompress.decompress() max_length + parameter, the zlib.decompress() bufsize parameter, and the + zlib.Decompress.flush() length parameter. -- asyncio: async() function is deprecated in favour of ensure_future(). +- Issue #25583: Avoid incorrect errors raised by os.makedirs(exist_ok=True) + when the OS gives priority to errors such as EACCES over EEXIST. -- Issue #23898: Fix inspect.classify_class_attrs() to support attributes - with overloaded __eq__ and __bool__. Patch by Mike Bayer. +- Issue #25593: Change semantics of EventLoop.stop() in asyncio. -- Issue #24298: Fix inspect.signature() to correctly unwrap wrappers - around bound methods. +- Issue #6973: When we know a subprocess.Popen process has died, do + not allow the send_signal(), terminate(), or kill() methods to do + anything as they could potentially signal a different process. -- Issue #23572: Fixed functools.singledispatch on classes with falsy - metaclasses. Patch by Ethan Furman. +- Issue #25590: In the Readline completer, only call getattr() once per + attribute. -IDLE ----- +- Issue #25498: Fix a crash when garbage-collecting ctypes objects created + by wrapping a memoryview. This was a regression made in 3.5a1. Based + on patch by Eryksun. -- Issue 15348: Stop the debugger engine (normally in a user process) - before closing the debugger window (running in the IDLE process). - This prevents the RuntimeErrors that were being caught and ignored. +- Issue #25584: Added "escape" to the __all__ list in the glob module. -- Issue #24455: Prevent IDLE from hanging when a) closing the shell while the - debugger is active (15347); b) closing the debugger with the [X] button - (15348); and c) activating the debugger when already active (24455). - The patch by Mark Roseman does this by making two changes. - 1. Suspend and resume the gui.interaction method with the tcl vwait - mechanism intended for this purpose (instead of root.mainloop & .quit). - 2. In gui.run, allow any existing interaction to terminate first. +- Issue #25584: Fixed recursive glob() with patterns starting with '\*\*'. -- Change 'The program' to 'Your program' in an IDLE 'kill program?' message - to make it clearer that the program referred to is the currently running - user program, not IDLE itself. +- Issue #25446: Fix regression in smtplib's AUTH LOGIN support. -- Issue #24750: Improve the appearance of the IDLE editor window status bar. - Patch by Mark Roseman. +- Issue #18010: Fix the pydoc web server's module search function to handle + exceptions from importing packages. -- Issue #25313: Change the handling of new built-in text color themes to better - address the compatibility problem introduced by the addition of IDLE Dark. - Consistently use the revised idleConf.CurrentTheme everywhere in idlelib. +- Issue #25554: Got rid of circular references in regular expression parsing. -- Issue #24782: Extension configuration is now a tab in the IDLE Preferences - dialog rather than a separate dialog. The former tabs are now a sorted - list. Patch by Mark Roseman. +- Issue #25510: fileinput.FileInput.readline() now returns b'' instead of '' + at the end if the FileInput was opened with binary mode. + Patch by Ryosuke Ito. -- Issue #22726: Re-activate the config dialog help button with some content - about the other buttons and the new IDLE Dark theme. +- Issue #25503: Fixed inspect.getdoc() for inherited docstrings of properties. + Original patch by John Mark Vandenberg. -- Issue #24820: IDLE now has an 'IDLE Dark' built-in text color theme. - It is more or less IDLE Classic inverted, with a cobalt blue background. - Strings, comments, keywords, ... are still green, red, orange, ... . +- Issue #25515: Always use os.urandom as a source of randomness in uuid.uuid4. + +- Issue #21827: Fixed textwrap.dedent() for the case when largest common + whitespace is a substring of smallest leading whitespace. + Based on patch by Robert Li. + +- Issue #25447: The lru_cache() wrapper objects now can be copied and pickled + (by returning the original object unchanged). + +- Issue #25390: typing: Don't crash on Union[str, Pattern]. + +- Issue #25441: asyncio: Raise error from drain() when socket is closed. + +- Issue #25410: Cleaned up and fixed minor bugs in C implementation of + OrderedDict. + +- Issue #25411: Improved Unicode support in SMTPHandler through better use of + the email package. Thanks to user simon04 for the patch. + +- Issue #25407: Remove mentions of the formatter module being removed in + Python 3.6. + +- Issue #25406: Fixed a bug in C implementation of OrderedDict.move_to_end() + that caused segmentation fault or hang in iterating after moving several + items to the start of ordered dict. + +- Issue #25364: zipfile now works in threads disabled builds. + +- Issue #25328: smtpd's SMTPChannel now correctly raises a ValueError if both + decode_data and enable_SMTPUTF8 are set to true. + +- Issue #25316: distutils raises OSError instead of DistutilsPlatformError + when MSVC is not installed. + +- Issue #25380: Fixed protocol for the STACK_GLOBAL opcode in + pickletools.opcodes. + +- Issue #23972: Updates asyncio datagram create method allowing reuseport + and reuseaddr socket options to be set prior to binding the socket. + Mirroring the existing asyncio create_server method the reuseaddr option + for datagram sockets defaults to True if the O/S is 'posix' (except if the + platform is Cygwin). Patch by Chris Laws. + +- Issue #25304: Add asyncio.run_coroutine_threadsafe(). This lets you + submit a coroutine to a loop from another thread, returning a + concurrent.futures.Future. By Vincent Michel. + +- Issue #25232: Fix CGIRequestHandler to split the query from the URL at the + first question mark (?) rather than the last. Patch from Xiang Zhang. + +- Issue #24657: Prevent CGIRequestHandler from collapsing slashes in the + query part of the URL as if it were a path. Patch from Xiang Zhang. + +- Issue #24483: C implementation of functools.lru_cache() now calculates key's + hash only once. + +- Issue #22958: Constructor and update method of weakref.WeakValueDictionary + now accept the self and the dict keyword arguments. + +- Issue #22609: Constructor of collections.UserDict now accepts the self keyword + argument. + +- Issue #25111: Fixed comparison of traceback.FrameSummary. + +- Issue #25262. Added support for BINBYTES8 opcode in Python implementation of + unpickler. Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8 + opcodes no longer silently ignored on 32-bit platforms in C implementation. + +- Issue #25034: Fix string.Formatter problem with auto-numbering and + nested format_specs. Patch by Anthon van der Neut. + +- Issue #25233: Rewrite the guts of asyncio.Queue and + asyncio.Semaphore to be more understandable and correct. + +- Issue #25203: Failed readline.set_completer_delims() no longer left the + module in inconsistent state. + +- Issue #23600: Default implementation of tzinfo.fromutc() was returning + wrong results in some cases. + +- Issue #23329: Allow the ssl module to be built with older versions of + LibreSSL. + +- Prevent overflow in _Unpickler_Read. + +- Issue #25047: The XML encoding declaration written by Element Tree now + respects the letter case given by the user. This restores the ability to + write encoding names in uppercase like "UTF-8", which worked in Python 2. + +- Issue #25135: Make deque_clear() safer by emptying the deque before clearing. + This helps avoid possible reentrancy issues. + +- Issue #19143: platform module now reads Windows version from kernel32.dll to + avoid compatibility shims. + +- Issue #25092: Fix datetime.strftime() failure when errno was already set to + EINVAL. + +- Issue #23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methods + of datetime.datetime: microseconds are now rounded to nearest with ties + going to nearest even integer (ROUND_HALF_EVEN), instead of being rounding + towards minus infinity (ROUND_FLOOR). It's important that these methods use + the same rounding mode than datetime.timedelta to keep the property: + (datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t). + It also the rounding mode used by round(float) for example. + +- Issue #25155: Fix datetime.datetime.now() and datetime.datetime.utcnow() on + Windows to support date after year 2038. It was a regression introduced in + Python 3.5.0. + +- Issue #25108: Omitted internal frames in traceback functions print_stack(), + format_stack(), and extract_stack() called without arguments. + +- Issue #25118: Fix a regression of Python 3.5.0 in os.waitpid() on Windows. + +- Issue #24684: socket.socket.getaddrinfo() now calls + PyUnicode_AsEncodedString() instead of calling the encode() method of the + host, to handle correctly custom string with an encode() method which doesn't + return a byte string. The encoder of the IDNA codec is now called directly + instead of calling the encode() method of the string. + +- Issue #25060: Correctly compute stack usage of the BUILD_MAP opcode. + +- Issue #24857: Comparing call_args to a long sequence now correctly returns a + boolean result instead of raising an exception. Patch by A Kaptur. + +- Issue #23144: Make sure that HTMLParser.feed() returns all the data, even + when convert_charrefs is True. + +- Issue #24982: shutil.make_archive() with the "zip" format now adds entries + for directories (including empty directories) in ZIP file. + +- Issue #25019: Fixed a crash caused by setting non-string key of expat parser. + Based on patch by John Leitch. + +- Issue #16180: Exit pdb if file has syntax error, instead of trapping user + in an infinite loop. Patch by Xavier de Gaye. + +- Issue #24891: Fix a race condition at Python startup if the file descriptor + of stdin (0), stdout (1) or stderr (2) is closed while Python is creating + sys.stdin, sys.stdout and sys.stderr objects. These attributes are now set + to None if the creation of the object failed, instead of raising an OSError + exception. Initial patch written by Marco Paolini. + +- Issue #24992: Fix error handling and a race condition (related to garbage + collection) in collections.OrderedDict constructor. + +- Issue #24881: Fixed setting binary mode in Python implementation of FileIO + on Windows and Cygwin. Patch from Akira Li. + +- Issue #25578: Fix (another) memory leak in SSLSocket.getpeercer(). + +- Issue #25530: Disable the vulnerable SSLv3 protocol by default when creating + ssl.SSLContext. + +- Issue #25569: Fix memory leak in SSLSocket.getpeercert(). + +- Issue #25471: Sockets returned from accept() shouldn't appear to be + nonblocking. + +- Issue #25319: When threading.Event is reinitialized, the underlying condition + should use a regular lock rather than a recursive lock. + +- Issue #21112: Fix regression in unittest.expectedFailure on subclasses. + Patch from Berker Peksag. + +- Issue #24764: cgi.FieldStorage.read_multi() now ignores the Content-Length + header in part headers. Patch written by Peter Landry and reviewed by Pierre + Quentel. + +- Issue #24913: Fix overrun error in deque.index(). + Found by John Leitch and Bryce Darling. + +- Issue #24774: Fix docstring in http.server.test. Patch from Chiu-Hsiang Hsu. + +- Issue #21159: Improve message in configparser.InterpolationMissingOptionError. + Patch from Łukasz Langa. + +- Issue #20362: Honour TestCase.longMessage correctly in assertRegex. + Patch from Ilia Kurenkov. + +- Issue #23572: Fixed functools.singledispatch on classes with falsy + metaclasses. Patch by Ethan Furman. + +- asyncio: ensure_future() now accepts awaitable objects. + +IDLE +---- + +- Issue 15348: Stop the debugger engine (normally in a user process) + before closing the debugger window (running in the IDLE process). + This prevents the RuntimeErrors that were being caught and ignored. + +- Issue #24455: Prevent IDLE from hanging when a) closing the shell while the + debugger is active (15347); b) closing the debugger with the [X] button + (15348); and c) activating the debugger when already active (24455). + The patch by Mark Roseman does this by making two changes. + 1. Suspend and resume the gui.interaction method with the tcl vwait + mechanism intended for this purpose (instead of root.mainloop & .quit). + 2. In gui.run, allow any existing interaction to terminate first. + +- Change 'The program' to 'Your program' in an IDLE 'kill program?' message + to make it clearer that the program referred to is the currently running + user program, not IDLE itself. + +- Issue #24750: Improve the appearance of the IDLE editor window status bar. + Patch by Mark Roseman. + +- Issue #25313: Change the handling of new built-in text color themes to better + address the compatibility problem introduced by the addition of IDLE Dark. + Consistently use the revised idleConf.CurrentTheme everywhere in idlelib. + +- Issue #24782: Extension configuration is now a tab in the IDLE Preferences + dialog rather than a separate dialog. The former tabs are now a sorted + list. Patch by Mark Roseman. + +- Issue #22726: Re-activate the config dialog help button with some content + about the other buttons and the new IDLE Dark theme. + +- Issue #24820: IDLE now has an 'IDLE Dark' built-in text color theme. + It is more or less IDLE Classic inverted, with a cobalt blue background. + Strings, comments, keywords, ... are still green, red, orange, ... . To use it with IDLEs released before November 2015, hit the 'Save as New Custom Theme' button and enter a new name, such as 'Custom Dark'. The custom theme will work with any IDLE