3.7.0b4 - Cpython — ContextQMD

.. bpo: 33363 .. date: 2018-04-26-22-48-28 .. nonce: 8RCnN2 .. release date: 2018-05-02 .. section: Core and Builtins

Raise a SyntaxError for async with and async for statements outside of async functions.

.. bpo: 33128 .. date: 2018-04-24-22-31-04 .. nonce: g2yLuf .. section: Core and Builtins

Fix a bug that causes PathFinder to appear twice on sys.meta_path. Patch by Pablo Galindo Salgado.

.. bpo: 33312 .. date: 2018-04-19-08-30-07 .. nonce: mDe2iL .. section: Core and Builtins

Fixed clang ubsan (undefined behavior sanitizer) warnings in dictobject.c by adjusting how the internal struct _dictkeysobject shared keys structure is declared.

.. bpo: 33231 .. date: 2018-04-05-22-20-44 .. nonce: 3Jmo0q .. section: Core and Builtins

Fix potential memory leak in normalizestring().

.. bpo: 33205 .. date: 2018-04-03-00-58-41 .. nonce: lk2F3r .. section: Core and Builtins

Change dict growth function from round_up_to_power_2(used*2+hashtable_size/2) to round_up_to_power_2(used*3). Previously, dict is shrunk only when used == 0. Now dict has more chance to be shrunk.

.. bpo: 29922 .. date: 2018-04-03-00-30-25 .. nonce: CdLuMl .. section: Core and Builtins

Improved error messages in 'async with' when __aenter__() or __aexit__() return non-awaitable object.

.. bpo: 33199 .. date: 2018-04-02-09-32-40 .. nonce: TPnxQu .. section: Core and Builtins

Fix ma_version_tag in dict implementation is uninitialized when copying from key-sharing dict.

.. bpo: 33281 .. date: 2018-05-01-22-35-50 .. nonce: d4jOt4 .. section: Library

Fix ctypes.util.find_library regression on macOS.

.. bpo: 33383 .. date: 2018-04-29-11-15-38 .. nonce: g32YWn .. section: Library

Fixed crash in the get() method of the :mod:dbm.ndbm database object when it is called with a single argument.

.. bpo: 33329 .. date: 2018-04-23-13-21-39 .. nonce: lQ-Eod .. section: Library

Fix multiprocessing regression on newer glibcs

.. bpo: 991266 .. date: 2018-04-21-00-24-08 .. nonce: h93TP_ .. section: Library

Fix quoting of the Comment attribute of :class:http.cookies.SimpleCookie.

.. bpo: 33131 .. date: 2018-04-20-10-43-17 .. nonce: L2E977 .. section: Library

Upgrade bundled version of pip to 10.0.1.

.. bpo: 33308 .. date: 2018-04-18-19-12-25 .. nonce: fW75xi .. section: Library

Fixed a crash in the :mod:parser module when converting an ST object to a tree of tuples or lists with line_info=False and col_info=True.

.. bpo: 33266 .. date: 2018-04-16-15-59-21 .. nonce: w2PAm- .. section: Library

lib2to3 now recognizes rf'...' strings.

.. bpo: 11594 .. date: 2018-04-16-08-42-03 .. nonce: QLo4vv .. section: Library

Ensure line-endings are respected when using lib2to3.

.. bpo: 33254 .. date: 2018-04-13-15-14-47 .. nonce: DS4KFK .. section: Library

Have :func:importlib.resources.contents and :meth:!importlib.abc.ResourceReader.contents return an :term:iterable instead of an :term:iterator.

.. bpo: 33256 .. date: 2018-04-10-20-57-14 .. nonce: ndHkqu .. section: Library

Fix display of <module> call in the html produced by cgitb.html(). Patch by Stéphane Blondon.

.. bpo: 33185 .. date: 2018-04-08-22-54-07 .. nonce: Id-Ba9 .. section: Library

Fixed regression when running pydoc with the :option:-m switch. (The regression was introduced in 3.7.0b3 by the resolution of :issue:33053) This fix also changed pydoc to add os.getcwd() to :data:sys.path when necessary, rather than adding ".".

.. bpo: 33169 .. date: 2018-04-06-14-56-26 .. nonce: ByhDqb .. section: Library

Delete entries of None in :data:sys.path_importer_cache when :meth:importlib.machinery.invalidate_caches is called.

.. bpo: 33217 .. date: 2018-04-05-13-36-09 .. nonce: FfOKDI .. section: Library

Deprecate looking up non-Enum objects in Enum classes and Enum members (will raise :exc:TypeError in 3.8+).

.. bpo: 33203 .. date: 2018-04-05-11-09-45 .. nonce: Hje9Py .. section: Library

random.Random.choice() now raises IndexError for empty sequences consistently even when called from subclasses without a getrandbits() implementation.

.. bpo: 33224 .. date: 2018-04-04-23-41-30 .. nonce: pyR0jB .. section: Library

Update difflib.mdiff() for :pep:479. Convert an uncaught StopIteration in a generator into a return-statement.

.. bpo: 33209 .. date: 2018-04-03-10-37-13 .. nonce: 9sGWE_ .. section: Library

End framing at the end of C implementation of :func:pickle.Pickler.dump.

.. bpo: 20104 .. date: 2018-04-01-19-21-04 .. nonce: -AKcGa .. section: Library

Improved error handling and fixed a reference leak in :func:os.posix_spawn.

.. bpo: 33175 .. date: 2018-03-29-04-32-25 .. nonce: _zs1yM .. section: Library

In dataclasses, Field.set_name now looks up the set_name special method on the class, not the instance, of the default value.

.. bpo: 33097 .. date: 2018-03-18-16-48-23 .. nonce: Yl4gI2 .. section: Library

Raise RuntimeError when executor.submit is called during interpreter shutdown.

.. bpo: 31908 .. date: 2017-10-31 .. nonce: g4xh8x .. section: Library

Fix output of cover files for trace module command-line tool. Previously emitted cover files only when --missing option was used. Patch by Michael Selik.

.. bpo: 33378 .. date: 2018-04-29-04-02-18 .. nonce: -anAHN .. section: Documentation

Add Korean language switcher for https://docs.python.org/3/

.. bpo: 33276 .. date: 2018-04-20-14-09-36 .. nonce: rA1z_3 .. section: Documentation

Clarify that the __path__ attribute on modules cannot be just any value.

.. bpo: 33201 .. date: 2018-04-01-21-03-41 .. nonce: aa8Lkl .. section: Documentation

Modernize documentation for writing C extension types.

.. bpo: 33195 .. date: 2018-04-01-14-30-36 .. nonce: dRS-XX .. section: Documentation

Deprecate Py_UNICODE usage in c-api/arg document. Py_UNICODE related APIs are deprecated since Python 3.3, but it is missed in the document.

.. bpo: 8243 .. date: 2018-01-13-20-30-53 .. nonce: s98r28 .. section: Documentation

Add a note about curses.addch and curses.addstr exception behavior when writing outside a window, or pad.

.. bpo: 32337 .. date: 2017-12-22-17-29-37 .. nonce: eZe-ID .. section: Documentation

Update documentation related with dict order.

.. bpo: 33358 .. date: 2018-04-27-11-46-35 .. nonce: _OcR59 .. section: Tests

Fix test_embed.test_pre_initialization_sys_options() when the interpreter is built with --enable-shared.

.. bpo: 33394 .. date: 2018-04-30-17-36-46 .. nonce: _Vdi4t .. section: Build

Enable the verbose build for extension modules, when GNU make is passed macros on the command line.

.. bpo: 33393 .. date: 2018-04-30-17-19-37 .. nonce: HkVCqI .. section: Build

Update config.guess and config.sub files.

.. bpo: 33377 .. date: 2018-04-30-16-53-00 .. nonce: QBh6vP .. section: Build

Add new triplets for mips r6 and riscv variants (used in extension suffixes).

.. bpo: 32232 .. date: 2018-04-17-00-38-19 .. nonce: o7G_UO .. section: Build

By default, modules configured in Modules/Setup are no longer built with -DPy_BUILD_CORE. Instead, modules that specifically need that preprocessor definition include it in their individual entries.

.. bpo: 33182 .. date: 2018-03-30-14-55-48 .. nonce: CePczb .. section: Build

The embedding tests can once again be built with clang 6.0

.. bpo: 33184 .. date: 2018-04-13-11-28-55 .. nonce: 7YhqQE .. section: Windows

Update Windows installer to use OpenSSL 1.1.0h.

.. bpo: 33184 .. date: 2018-04-07-00-51-34 .. nonce: 3j208P .. section: macOS

Update macOS installer build to use OpenSSL 1.1.0h.

.. bpo: 21474 .. date: 2018-04-29-16-13-02 .. nonce: bglg-F .. section: IDLE

Update word/identifier definition from ascii to unicode. In text and entry boxes, this affects selection by double-click, movement left/right by control-left/right, and deletion left/right by control-BACKSPACE/DEL.

.. bpo: 33204 .. date: 2018-04-02-00-28-13 .. nonce: NBsuIv .. section: IDLE

IDLE: consistently color invalid string prefixes. A 'u' string prefix cannot be paired with either 'r' or 'f'. Consistently color as much of the prefix, starting at the right, as is valid. Revise and extend colorizer test.

.. bpo: 33189 .. date: 2018-04-03-18-10-00 .. nonce: QrXR00 .. section: Tools/Demos

:program:pygettext.py now recognizes only literal strings as docstrings and translatable strings, and rejects bytes literals and f-string expressions.

.. bpo: 31920 .. date: 2018-03-26-18-54-24 .. nonce: u_WKsT .. section: Tools/Demos

Fixed handling directories as arguments in the pygettext script. Based on patch by Oleg Krasnikov.

.. bpo: 29673 .. date: 2018-03-16-17-25-05 .. nonce: m8QtaW .. section: Tools/Demos

Fix pystackv and pystack gdbinit macros.

.. bpo: 31583 .. date: 2017-09-26-10-11-21 .. nonce: TM90_H .. section: Tools/Demos

Fix 2to3 for using with --add-suffix option but without --output-dir option for relative path to files in current directory.