+++++++++++

Python News

+++++++++++

What's New in Python 3.5.3 release candidate 1?

===============================================

Release date: TBA

Core and Builtins

-----------------

- Issue #27419: Standard __import__() no longer look up "__import__" in globals

or builtins for importing submodules or "from import". Fixed handling an

error of non-string package name.

- Issue #27083: Respect the PYTHONCASEOK environment variable under Windows.

- Issue #27514: Make having too many statically nested blocks a SyntaxError

instead of SystemError.

- Issue #27473: Fixed possible integer overflow in bytes and bytearray

concatenations. Patch by Xiang Zhang.

- Issue #27507: Add integer overflow check in bytearray.extend(). Patch by

Xiang Zhang.

- Issue #27581: Don't rely on wrapping for overflow check in

PySequence_Tuple(). Patch by Xiang Zhang.

- Issue #27443: __length_hint__() of bytearray iterators no longer return a

negative integer for a resized bytearray.

Library

-------

- Issue #27130: In the "zlib" module, fix handling of large buffers

(typically 4 GiB) when compressing and decompressing. Previously, inputs

were limited to 4 GiB, and compression and decompression operations did not

properly handle results of 4 GiB.

- Issue #27533: Release GIL in nt._isdir

- Issue #17711: Fixed unpickling by the persistent ID with protocol 0.

Original patch by Alexandre Vassalotti.

- Issue #27522: Avoid an unintentional reference cycle in email.feedparser.

- Issue #26844: Fix error message for imp.find_module() to refer to 'path'

instead of 'name'. Patch by Lev Maximov.

- Issue #23804: Fix SSL zero-length recv() calls to not block and not raise

an error about unclean EOF.

- Issue #27466: Change time format returned by http.cookie.time2netscape,

confirming the netscape cookie format and making it consistent with

documentation.

- Issue #26664: Fix activate.fish by removing mis-use of ``$``.

- Issue #22115: Fixed tracing Tkinter variables: trace_vdelete() with wrong

mode no longer break tracing, trace_vinfo() now always returns a list of

pairs of strings, tracing in the "u" mode now works.

- Fix a scoping issue in importlib.util.LazyLoader which triggered an

UnboundLocalError when lazy-loading a module that was already put into

sys.modules.

- Issue #27079: Fixed curses.ascii functions isblank(), iscntrl() and ispunct().

- Issue #26754: Some functions (compile() etc) accepted a filename argument

encoded as an iterable of integers. Now only strings and byte-like objects

are accepted.

- Issue #27048: Prevents distutils failing on Windows when environment

variables contain non-ASCII characters

- Issue #27330: Fixed possible leaks in the ctypes module.

- Issue #27238: Got rid of bare excepts in the turtle module. Original patch

by Jelle Zijlstra.

- Issue #27122: When an exception is raised within the context being managed

by a contextlib.ExitStack() and one of the exit stack generators

catches and raises it in a chain, do not re-raise the original exception

when exiting, let the new chained one through. This avoids the PEP 479

bug described in issue25782.

- Issue #27278: Fix os.urandom() implementation using getrandom() on Linux.

Truncate size to INT_MAX and loop until we collected enough random bytes,

instead of casting a directly Py_ssize_t to int.

- Issue #26386: Fixed ttk.TreeView selection operations with item id's

containing spaces.

- Issue #22636: Avoid shell injection problems with

ctypes.util.find_library().

- Issue #16182: Fix various functions in the "readline" module to use the

locale encoding, and fix get_begidx() and get_endidx() to return code point

indexes.

- Issue #26930: Update Windows builds to use OpenSSL 1.0.2h.

- Issue #27392: Add loop.connect_accepted_socket().

Patch by Jim Fulton.

IDLE

----

- Issue #27365: Allow non-ascii chars in IDLE NEWS.txt, for contributor names.

- Issue #27245: IDLE: Cleanly delete custom themes and key bindings.

Previously, when IDLE was started from a console or by import, a cascade

of warnings was emitted. Patch by Serhiy Storchaka.

C API

-----

- Issue #26754: PyUnicode_FSDecoder() accepted a filename argument encoded as

an iterable of integers. Now only strings and bytes-like objects are accepted.

Tests

-----

- Issue #27369: In test_pyexpat, avoid testing an error message detail that

changed in Expat 2.2.0.

Tools/Demos

-----------

- Issue #27332: Fixed the type of the first argument of module-level functions

generated by Argument Clinic. Patch by Petr Viktorin.

- Issue #27418: Fixed Tools/importbench/importbench.py.

Windows

-------

- Issue #27469: Adds a shell extension to the launcher so that drag and drop

works correctly.

- Issue #27309: Enabled proper Windows styles in python[w].exe manifest.

Build

-----

- Issue #27490: Do not build pgen when cross-compiling. Patch by Thomas

Perl.

- Issue #26662: Set PYTHON_FOR_GEN in configure as the Python program to be

used for file generation during the build.

What's New in Python 3.5.2?

===========================

Release date: 2016-06-26

Core and Builtins

-----------------

- Issue #26930: Update Windows builds to use OpenSSL 1.0.2h.

Tests

-----

- Issue #26867: Ubuntu's openssl OP_NO_SSLv3 is forced on by default; fix test.

IDLE

----

- Issue #27365: Allow non-ascii in idlelib/NEWS.txt - minimal part for 3.5.2.

What's New in Python 3.5.2 release candidate 1?

===============================================

Release date: 2016-06-12

Core and Builtins

-----------------

- Issue #27066: Fixed SystemError if a custom opener (for open()) returns a

negative number without setting an exception.

- Issue #20041: Fixed TypeError when frame.f_trace is set to None.

Patch by Xavier de Gaye.

- Issue #26168: Fixed possible refleaks in failing Py_BuildValue() with the "N"

format unit.

- Issue #26991: Fix possible refleak when creating a function with annotations.

- Issue #27039: Fixed bytearray.remove() for values greater than 127. Patch by

Joe Jevnik.

- Issue #23640: int.from_bytes() no longer bypasses constructors for subclasses.

- Issue #26811: gc.get_objects() no longer contains a broken tuple with NULL

pointer.

- Issue #20120: Use RawConfigParser for .pypirc parsing,

removing support for interpolation unintentionally added

with move to Python 3. Behavior no longer does any

interpolation in .pypirc files, matching behavior in Python

2.7 and Setuptools 19.0.

- Issue #26659: Make the builtin slice type support cycle collection.

- Issue #26718: super.__init__ no longer leaks memory if called multiple times.

NOTE: A direct call of super.__init__ is not endorsed!

- Issue #25339: PYTHONIOENCODING now has priority over locale in setting the

error handler for stdin and stdout.

- Issue #26494: Fixed crash on iterating exhausting iterators.

Affected classes are generic sequence iterators, iterators of str, bytes,

bytearray, list, tuple, set, frozenset, dict, OrderedDict, corresponding

views and os.scandir() iterator.

- Issue #26581: If coding cookie is specified multiple times on a line in

Python source code file, only the first one is taken to account.

- Issue #26464: Fix str.translate() when string is ASCII and first replacements

removes character, but next replacement uses a non-ASCII character or a

string longer than 1 character. Regression introduced in Python 3.5.0.

- Issue #22836: Ensure exception reports from PyErr_Display() and

PyErr_WriteUnraisable() are sensible even when formatting them produces

secondary errors. This affects the reports produced by

sys.__excepthook__() and when __del__() raises an exception.

- Issue #26302: Correct behavior to reject comma as a legal character for

cookie names.

- Issue #4806: Avoid masking the original TypeError exception when using star

(*) unpacking in function calls. Based on patch by Hagen Fürstenau and

Daniel Urban.

- Issue #27138: Fix the doc comment for FileFinder.find_spec().

- Issue #26154: Add a new private _PyThreadState_UncheckedGet() function to get

the current Python thread state, but don't issue a fatal error if it is NULL.

This new function must be used instead of accessing directly the

_PyThreadState_Current variable. The variable is no more exposed since

Python 3.5.1 to hide the exact implementation of atomic C types, to avoid

compiler issues.

- Issue #26194: Deque.insert() gave odd results for bounded deques that had

reached their maximum size. Now an IndexError will be raised when attempting

to insert into a full deque.

- Issue #25843: When compiling code, don't merge constants if they are equal

but have a different types. For example, ``f1, f2 = lambda: 1, lambda: 1.0``

is now correctly compiled to two different functions: ``f1()`` returns ``1``

(``int``) and ``f2()`` returns ``1.0`` (``int``), even if ``1`` and ``1.0``

are equal.

- Issue #22995: [UPDATE] Comment out the one of the pickleability tests in

_PyObject_GetState() due to regressions observed in Cython-based projects.

- Issue #25961: Disallowed null characters in the type name.

- Issue #25973: Fix segfault when an invalid nonlocal statement binds a name

starting with two underscores.

- Issue #22995: Instances of extension types with a state that aren't

subclasses of list or dict and haven't implemented any pickle-related

methods (__reduce__, __reduce_ex__, __getnewargs__, __getnewargs_ex__,

or __getstate__), can no longer be pickled. Including memoryview.

- Issue #20440: Massive replacing unsafe attribute setting code with special

macro Py_SETREF.

- Issue #25766: Special method __bytes__() now works in str subclasses.

- Issue #25421: __sizeof__ methods of builtin types now use dynamic basic size.

This allows sys.getsize() to work correctly with their subclasses with

__slots__ defined.

- Issue #25709: Fixed problem with in-place string concatenation and utf-8 cache.

- Issue #27147: Mention PEP 420 in the importlib docs.

- Issue #24097: Fixed crash in object.__reduce__() if slot name is freed inside

__getattr__.

- Issue #24731: Fixed crash on converting objects with special methods

__bytes__, __trunc__, and __float__ returning instances of subclasses of

bytes, int, and float to subclasses of bytes, int, and float correspondingly.

- Issue #26478: Fix semantic bugs when using binary operators with dictionary

views and tuples.

- Issue #26171: Fix possible integer overflow and heap corruption in

zipimporter.get_data().

- Issue #25660: Fix TAB key behaviour in REPL with readline.

- Issue #25887: Raise a RuntimeError when a coroutine object is awaited

more than once.

- Issue #27243: Update the __aiter__ protocol: instead of returning

an awaitable that resolves to an asynchronous iterator, the asynchronous

iterator should be returned directly. Doing the former will trigger a

PendingDeprecationWarning.

Library

-------

- Issue #26556: Update expat to 2.1.1, fixes CVE-2015-1283.

- Fix TLS stripping vulnerability in smtplib, CVE-2016-0772. Reported by Team

Oststrom

- Issue #21386: Implement missing IPv4Address.is_global property. It was

documented since 07a5610bae9d. Initial patch by Roger Luethi.

- Issue #20900: distutils register command now decodes HTTP responses

correctly. Initial patch by ingrid.

- A new version of typing.py provides several new classes and

features: @overload outside stubs, Reversible, DefaultDict, Text,

ContextManager, Type[], NewType(), TYPE_CHECKING, and numerous bug

fixes (note that some of the new features are not yet implemented in

mypy or other static analyzers). Also classes for PEP 492

(Awaitable, AsyncIterable, AsyncIterator) have been added (in fact

they made it into 3.5.1 but were never mentioned).

- Issue #25738: Stop http.server.BaseHTTPRequestHandler.send_error() from

sending a message body for 205 Reset Content. Also, don't send Content

header fields in responses that don't have a body. Patch by Susumu

Koshiba.

- Issue #21313: Fix the "platform" module to tolerate when sys.version

contains truncated build information.

- Issue #26839: On Linux, :func:`os.urandom` now calls ``getrandom()`` with

``GRND_NONBLOCK`` to fall back on reading ``/dev/urandom`` if the urandom

entropy pool is not initialized yet. Patch written by Colm Buckley.

- Issue #27164: In the zlib module, allow decompressing raw Deflate streams

with a predefined zdict. Based on patch by Xiang Zhang.

- Issue #24291: Fix wsgiref.simple_server.WSGIRequestHandler to completely

write data to the client. Previously it could do partial writes and

truncate data. Also, wsgiref.handler.ServerHandler can now handle stdout

doing partial writes, but this is deprecated.

- Issue #26809: Add ``__all__`` to :mod:`string`. Patch by Emanuel Barry.

- Issue #26373: subprocess.Popen.communicate now correctly ignores

BrokenPipeError when the child process dies before .communicate()

is called in more/all circumstances.

- Issue #21776: distutils.upload now correctly handles HTTPError.

Initial patch by Claudiu Popa.

- Issue #27114: Fix SSLContext._load_windows_store_certs fails with

PermissionError

- Issue #18383: Avoid creating duplicate filters when using filterwarnings

and simplefilter. Based on patch by Alex Shkop.

- 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 #27014: Fix infinite recursion using typing.py. Thanks to Kalle Tuure!

- Issue #14132: Fix urllib.request redirect handling when the target only has

a query string. Original fix by Ján Janech.

- 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 #26892: Honor debuglevel flag in urllib.request.HTTPHandler. Patch

contributed by Chi Hsuan Yen.

- Issue #22274: In the subprocess module, allow stderr to be redirected to

stdout even when stdout is not redirected. Patch by Akira Li.

- Issue #26807: mock_open 'files' no longer error on readline at end of file.

Patch from Yolanda Robla.

- Issue #25745: Fixed leaking a userptr in curses panel destructor.

- Issue #26977: Removed unnecessary, and ignored, call to sum of squares helper

in statistics.pvariance.

- Issue #26881: The modulefinder module now supports extended opcode arguments.

- Issue #23815: Fixed crashes related to directly created instances of types in

_tkinter and curses.panel modules.

- Issue #17765: weakref.ref() no longer silently ignores keyword arguments.

Patch by Georg Brandl.

- Issue #26873: xmlrpc now raises ResponseError on unsupported type tags

instead of silently return incorrect result.

- Issue #26711: Fixed the comparison of plistlib.Data with other types.

- Issue #24114: Fix an uninitialized variable in `ctypes.util`.

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 #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 #26634: recursive_repr() now sets __qualname__ of wrapper. Patch by

Xiang Zhang.

- 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 #26837: assertSequenceEqual() now correctly outputs non-stringified

differing items (like bytes in the -b mode). This affects assertListEqual()

and assertTupleEqual().

- 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 #26822: itemgetter, attrgetter and methodcaller objects no longer

silently ignore keyword arguments.

- Issue #26733: Disassembling a class now disassembles class and static methods.

Patch by Xiang Zhang.

- Issue #26801: Fix error handling in :func:`shutil.get_terminal_size`, catch

:exc:`AttributeError` instead of :exc:`NameError`. Patch written by Emanuel

Barry.

- Issue #24838: tarfile's ustar and gnu formats now correctly calculate name

and link field limits for multibyte character encodings like utf-8.

- 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 #26717: Stop encoding Latin-1-ized WSGI paths with UTF-8. Patch by

Anthony Sottile.

- 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 #16329: Add .webm to mimetypes.types_map. Patch by Giampaolo Rodola'.

- Issue #13952: Add .csv to mimetypes.types_map. Patch by Geoff Wilson.

- Issue #26709: Fixed Y2038 problem in loading binary PLists.

- Issue #23735: Handle terminal resizing with Readline 6.3+ by installing our

own SIGWINCH handler. Patch by Eric Price.

- 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 #22854: Change BufferedReader.writable() and

BufferedWriter.readable() to always return False.

- 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 #26644: Raise ValueError rather than SystemError when a negative

length is passed to SSLSocket.recv() or read().

- Issue #23804: Fix SSL recv(0) and read(0) methods to return zero bytes

instead of up to 1024.

- Issue #26616: Fixed a bug in datetime.astimezone() method.

- 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 #24266: Ctrl+C during Readline history search now cancels the search

mode when compiled with Readline 7.

- Issue #26560: Avoid potential ValueError in BaseHandler.start_response.

Initial patch by Peter Inglesby.

- Issue #26313: ssl.py _load_windows_store_certs fails if windows cert store

is empty. Patch by Baji.

- Issue #26569: Fix :func:`pyclbr.readmodule` and :func:`pyclbr.readmodule_ex`

to support 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 #25320: Handle sockets in directories unittest discovery is scanning.

Patch from Victor van den Elzen.

- Issue #16181: cookiejar.http2time() now returns None if year is higher than

datetime.MAXYEAR.

- Issue #26513: Fixes platform module detection of Windows Server

- Issue #23718: Fixed parsing time in week 0 before Jan 1. Original patch by

Tamás Bence Gedai.

- Issue #20589: Invoking Path.owner() and Path.group() on Windows now raise

NotImplementedError instead of ImportError.

- Issue #26177: Fixed the keys() method for Canvas and Scrollbar widgets.

- Issue #15068: Got rid of excessive buffering in the fileinput module.

The bufsize parameter is no longer used.

- Issue #2202: Fix UnboundLocalError in

AbstractDigestAuthHandler.get_algorithm_impls. Initial patch by Mathieu Dupuy.

- Issue #25718: Fixed pickling and copying the accumulate() iterator with

total is None.

- Issue #26475: Fixed debugging output for regular expressions with the (?x)

flag.

- 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 #26385: Remove the file if the internal open() call in

NamedTemporaryFile() fails. Patch by Silent Ghost.

- 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 #25913: Leading ``<~`` is optional now in base64.a85decode() with

adobe=True. Patch by Swati Jaiswal.

- Issue #26186: Remove an invalid type check in importlib.util.LazyLoader.

- Issue #26367: importlib.__import__() raises SystemError like

builtins.__import__() when ``level`` is specified but without an accompanying

package specified.

- Issue #26309: In the "socketserver" module, shut down the request (closing

the connected socket) when verify_request() returns false. Patch by Aviv

Palivoda.

- Issue #25939: On Windows open the cert store readonly in ssl.enum_certificates.

- Issue #25995: os.walk() no longer uses FDs proportional to the tree depth.

- Issue #26117: The os.scandir() iterator now closes file descriptor not only

when the iteration is finished, but when it was failed with error.

- Issue #25911: Restored support of bytes paths in os.walk() on Windows.

- Issue #26045: Add UTF-8 suggestion to error message when posting a

non-Latin-1 string with http.client.

- Issue #12923: Reset FancyURLopener's redirect counter even if there is an

exception. Based on patches by Brian Brazil and Daniel Rocco.

- 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 #26202: copy.deepcopy() now correctly copies range() objects with

non-atomic attributes.

- Issue #23076: Path.glob() now raises a ValueError if it's called with an

invalid pattern. Patch by Thomas Nyberg.

- Issue #19883: Fixed possible integer overflows in zipimport.

- 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 #26147: xmlrpc now works with strings not encodable with used

non-UTF-8 encoding.

- Issue #25935: Garbage collector now breaks reference loops with OrderedDict.

- Issue #16620: Fixed AttributeError in msilib.Directory.glob().

- Issue #26013: Added compatibility with broken protocol 2 pickles created

in old Python 3 versions (3.4.3 and lower).

- Issue #25850: Use cross-compilation by default for 64-bit Windows.

- Issue #17633: Improve zipimport's support for namespace packages.

- Issue #24705: Fix sysconfig._parse_makefile not expanding ${} vars

appearing before $() vars.

- Issue #22138: Fix mock.patch behavior when patching descriptors. Restore

original values after patching. Patch contributed by Sean McCully.

- Issue #25672: In the ssl module, enable the SSL_MODE_RELEASE_BUFFERS mode

option if it is safe to do so.

- Issue #26012: Don't traverse into symlinks for ** pattern in

pathlib.Path.[r]glob().

- Issue #24120: Ignore PermissionError when traversing a tree with

pathlib.Path.[r]glob(). Patch by Ulrich Petri.

- Issue #25447: fileinput now uses sys.stdin as-is if it does not have a

buffer attribute (restores backward compatibility).

- 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 #24103: Fixed possible use after free in ElementTree.XMLPullParser.

- Issue #25860: os.fwalk() no longer skips remaining directories when error

occurs. Original patch by Samson Lee.

- Issue #25914: Fixed and simplified OrderedDict.__sizeof__.

- Issue #25902: Fixed various refcount issues in ElementTree iteration.

- 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 #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 #25764: In the subprocess module, preserve any exception caused by

fork() failure when preexec_fn is used.

- Issue #6478: _strptime's regexp cache now is reset after changing timezone

with time.tzset().

- 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 #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 #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 #25718: Fixed copying object with state with boolean value is false.

- Issue #10131: Fixed deep copying of minidom documents. Based on patch

by Marian Ganisin.

- Issue #25725: Fixed a reference leak in pickle.loads() when unpickling

invalid data including tuple instructions.

- Issue #25663: In the Readline completer, avoid listing duplicate global

names, and search the global namespace before searching builtins.

- Issue #25688: Fixed file leak in ElementTree.iterparse() raising an error.

- Issue #23914: Fixed SystemError raised by unpickler on broken pickle data.

- Issue #25691: Fixed crash on deleting ElementTree.Element attributes.

- Issue #25624: ZipFile now always writes a ZIP_STORED header for directory

entries. Patch by Dingyuan Wang.

- Skip getaddrinfo if host is already resolved.

Patch by A. Jesse Jiryu Davis.

- Issue #26050: Add asyncio.StreamReader.readuntil() method.

Patch by Марк Коренберг.

- 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 #26406: Avoid unnecessary serialization of getaddrinfo(3) calls on

current versions of OpenBSD and NetBSD. Patch by A. Jesse Jiryu Davis.

- Issue #26848: Fix asyncio/subprocess.communicate() to handle empty input.

Patch by Jack O'Connor.

- Issue #27040: Add loop.get_exception_handler method

- Issue #27041: asyncio: Add loop.create_future method

- Issue #27223: asyncio: Fix _read_ready and _write_ready to respect

_conn_lost.

Patch by Łukasz Langa.

- Issue #22970: asyncio: Fix inconsistency cancelling Condition.wait.

Patch by David Coles.

IDLE

----

- Issue #5124: Paste with text selected now replaces the selection on X11.

This matches how paste works on Windows, Mac, most modern Linux apps,

and ttk widgets. Original patch by Serhiy Storchaka.

- Issue #24759: Make clear in idlelib.idle_test.__init__ that the directory

is a private implementation of test.test_idle and tool for maintainers.

- Issue #27196: Stop 'ThemeChanged' warnings when running IDLE tests.

These persisted after other warnings were suppressed in #20567.

Apply Serhiy Storchaka's update_idletasks solution to four test files.

Record this additional advice in idle_test/README.txt

- Issue #20567: Revise idle_test/README.txt with advice about avoiding

tk warning messages from tests. Apply advice to several IDLE tests.

- Issue #27117: Make colorizer htest and turtledemo work with dark themes.

Move code for configuring text widget colors to a new function.

- Issue #26673: When tk reports font size as 0, change to size 10.

Such fonts on Linux prevented the configuration dialog from opening.

- Issue #21939: Add test for IDLE's percolator.

Original patch by Saimadhav Heblikar.

- Issue #21676: Add test for IDLE's replace dialog.

Original patch by Saimadhav Heblikar.

- Issue #18410: Add test for IDLE's search dialog.

Original patch by Westley Martínez.

- Issue #21703: Add test for IDLE's undo delegator.

Original patch by Saimadhav Heblikar .

- Issue #27044: Add ConfigDialog.remove_var_callbacks to stop memory leaks.

- Issue #23977: Add more asserts to test_delegator.

- Issue #20640: Add tests for idlelib.configHelpSourceEdit.

Patch by Saimadhav Heblikar.

- In the 'IDLE-console differences' section of the IDLE doc, clarify

how running with IDLE affects sys.modules and the standard streams.

- Issue #25507: fix incorrect change in IOBinding that prevented printing.

Augment IOBinding htest to include all major IOBinding functions.

- Issue #25905: Revert unwanted conversion of ' to ’ RIGHT SINGLE QUOTATION

MARK in README.txt and open this and NEWS.txt with 'ascii'.

Re-encode CREDITS.txt to utf-8 and open it with 'utf-8'.

Documentation

-------------

- Issue #24136: Document the new PEP 448 unpacking syntax of 3.5.

- Issue #26736: Used HTTPS for external links in the documentation if possible.

- 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 #23606: Adds note to ctypes documentation regarding cdll.msvcrt.

- Issue #25500: Fix documentation to not claim that __import__ is searched for

in the global scope.

- Issue #26014: Update 3.x packaging documentation:

* "See also" links to the new docs are now provided in the legacy pages

* links to setuptools documentation have been updated

Tests

-----

- Issue #21916: Added tests for the turtle module. Patch by ingrid,

Gregory Loyse and Jelle Zijlstra.

- Issue #26523: The multiprocessing thread pool (multiprocessing.dummy.Pool)

was untested.

- Issue #26015: Added new tests for pickling iterators of mutable sequences.

- Issue #26325: Added test.support.check_no_resource_warning() to check that

no ResourceWarning is emitted.

- Issue #25940: Changed test_ssl to use self-signed.pythontest.net. This

avoids relying on svn.python.org, which recently changed root certificate.

- Issue #25616: Tests for OrderedDict are extracted from test_collections

into separate file test_ordered_dict.

- Issue #26583: Skip test_timestamp_overflow in test_import if bytecode

files cannot be written.

Build

-----

- Issue #26884: Fix linking extension modules for cross builds.

Patch by Xavier de Gaye.

- 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.

- Issue #27229: Fix the cross-compiling pgen rule for in-tree builds. Patch

by Xavier de Gaye.

- Issue #21668: Link audioop, _datetime, _ctypes_test modules to libm,

except on Mac OS X. Patch written by Xavier de Gaye.

- 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.

- Issue #26624: Adds validation of ucrtbase[d].dll version with warning

for old versions.

- Issue #17603: Avoid error about nonexistant fileblocks.o file by using a

lower-level check for st_blocks in struct stat.

- Issue #26079: Fixing the build output folder for tix-8.4.3.6. Patch by

Bjoern Thiel.

- Issue #26465: Update Windows builds to use OpenSSL 1.0.2g.

- 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 #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 #25827: Add support for building with ICC to ``configure``, including

a new ``--with-icc`` flag.

- Issue #25696: Fix installation of Python on UNIX with make -j9.

- Issue #26930: Update OS X 10.5+ 32-bit-only installer to build

and link with OpenSSL 1.0.2h.

- Issue #26268: Update Windows builds to use OpenSSL 1.0.2f.

- Issue #25136: Support Apple Xcode 7's new textual SDK stub libraries.

- 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.

Windows

-------

- Issue #27053: Updates make_zip.py to correctly generate library ZIP file.

- 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 #26071: bdist_wininst created binaries fail to start and find

32bit Python

- Issue #26073: Update the list of magic numbers in launcher

- Issue #26065: Excludes venv from library when generating embeddable

distro.

Tools/Demos

-----------

- 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 #26271: Fix the Freeze tool to properly use flags passed through

configure. Patch by Daniel Shaulov.

- Issue #26489: Add dictionary unpacking support to Tools/parser/unparse.py.

Patch by Guo Ci Teo.

- Issue #26316: Fix variable name typo in Argument Clinic.

Misc

----

- Issue #17500, and https://github.com/python/pythondotorg/issues/945: Remove

unused and outdated icons.

What's New in Python 3.5.1 final?

=================================

Release date: 2015-12-06

Core and Builtins

-----------------

- Issue #25709: Fixed problem with in-place string concatenation and

utf-8 cache.

Windows

-------

- Issue #25715: Python 3.5.1 installer shows wrong upgrade path and incorrect

logic for launcher detection.

What's New in Python 3.5.1 release candidate 1?

===============================================

Release date: 2015-11-22

Core and Builtins

-----------------

- Issue #25630: Fix a possible segfault during argument parsing in functions

that accept filesystem paths.

- 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 #25388: Fixed tokenizer crash when processing undecodable source code

with a null byte.

- Issue #25462: The hash of the key now is calculated only once in most

operations in C implementation of OrderedDict.

- Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now

rejects builtin types with not defined __new__.

- Issue #25555: Fix parser and AST: fill lineno and col_offset of "arg" node

when compiling AST from Python objects.

- 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 #24726: Fixed a crash and leaking NULL in repr() of OrderedDict that

was mutated by direct calls of dict methods.

- Issue #25449: Iterating OrderedDict with keys with unstable hash now raises

KeyError in C implementations as well as in Python implementation.

- Issue #25395: Fixed crash when highly nested OrderedDict structures were

garbage collected.

- 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 #24402: Fix input() to prompt to the redirected stdout when

sys.stdout.fileno() fails.

- 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.

- Issue #25280: Import trace messages emitted in verbose (-v) mode are no

longer formatted twice.

- 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 #25182: The stdprinter (used as sys.stderr before the io module is

imported at startup) now uses the backslashreplace error handler.

- Issue #25131: Make the line number and column offset of set/dict literals and

comprehensions correspond to the opening brace.

- 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.

Library

-------

- 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.