Python 3.9.0a5

Include/patchlevel.h

@@ -20,10 +20,10 @@
 #define PY_MINOR_VERSION        9
 #define PY_MICRO_VERSION        0
 #define PY_RELEASE_LEVEL        PY_RELEASE_LEVEL_ALPHA
-#define PY_RELEASE_SERIAL       4
+#define PY_RELEASE_SERIAL       5
 
 /* Version as a string */
-#define PY_VERSION              "3.9.0a4+"
+#define PY_VERSION              "3.9.0a5"
 /*--end constants--*/
 
 /* Version as a single 4-byte hex number, e.g. 0x010502B2 == 1.5.2b2.

Lib/pydoc_data/topics.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Autogenerated by Sphinx on Tue Feb 25 13:20:31 2020
+# Autogenerated by Sphinx on Mon Mar 23 17:18:04 2020
 topics = {'assert': 'The "assert" statement\n'
            '**********************\n'
            '\n'
@@ -1476,8 +1476,8 @@ topics = {'assert': 'The "assert" statement\n'
           '                     | starred_and_keywords ["," '
           'keywords_arguments]\n'
           '                     | keywords_arguments\n'
-          '   positional_arguments ::= ["*"] expression ("," ["*"] '
+          '   positional_arguments ::= positional_item ("," positional_item)*\n'
-          'expression)*\n'
+          '   positional_item      ::= assignment_expression | "*" expression\n'
           '   starred_and_keywords ::= ("*" expression | keyword_item)\n'
           '                            ("," "*" expression | "," '
           'keyword_item)*\n'
@@ -1717,6 +1717,10 @@ topics = {'assert': 'The "assert" statement\n'
           'for\n'
           'function decorators.  The result is then bound to the class name.\n'
           '\n'
+          'Changed in version 3.9: Classes may be decorated with any valid\n'
+          '"assignment_expression". Previously, the grammar was much more\n'
+          'restrictive; see **PEP 614** for details.\n'
+          '\n'
           '**Programmer’s note:** Variables defined in the class definition '
           'are\n'
           'class attributes; they are shared by instances.  Instance '
@@ -2187,8 +2191,8 @@ topics = {'assert': 'The "assert" statement\n'
              '\n'
              'The "if" statement is used for conditional execution:\n'
              '\n'
-             '   if_stmt ::= "if" expression ":" suite\n'
+             '   if_stmt ::= "if" assignment_expression ":" suite\n'
-             '               ("elif" expression ":" suite)*\n'
+             '               ("elif" assignment_expression ":" suite)*\n'
              '               ["else" ":" suite]\n'
              '\n'
              'It selects exactly one of the suites by evaluating the '
@@ -2211,7 +2215,7 @@ topics = {'assert': 'The "assert" statement\n'
              'an\n'
              'expression is true:\n'
              '\n'
-             '   while_stmt ::= "while" expression ":" suite\n'
+             '   while_stmt ::= "while" assignment_expression ":" suite\n'
              '                  ["else" ":" suite]\n'
              '\n'
              'This repeatedly tests the expression and, if it is true, '
@@ -2626,8 +2630,8 @@ topics = {'assert': 'The "assert" statement\n'
              '[parameter_list] ")"\n'
              '               ["->" expression] ":" suite\n'
              '   decorators                ::= decorator+\n'
-             '   decorator                 ::= "@" dotted_name ["(" '
+             '   decorator                 ::= "@" assignment_expression '
-             '[argument_list [","]] ")"] NEWLINE\n'
+             'NEWLINE\n'
              '   dotted_name               ::= identifier ("." identifier)*\n'
              '   parameter_list            ::= defparameter ("," '
              'defparameter)* "," "/" ["," [parameter_list_no_posonly]]\n'
@@ -2681,6 +2685,11 @@ topics = {'assert': 'The "assert" statement\n'
              'the name\n'
              '"func".\n'
              '\n'
+             'Changed in version 3.9: Functions may be decorated with any '
+             'valid\n'
+             '"assignment_expression". Previously, the grammar was much more\n'
+             'restrictive; see **PEP 614** for details.\n'
+             '\n'
              'When one or more *parameters* have the form *parameter* "="\n'
              '*expression*, the function is said to have “default parameter '
              'values.”\n'
@@ -2882,6 +2891,10 @@ topics = {'assert': 'The "assert" statement\n'
              'function decorators.  The result is then bound to the class '
              'name.\n'
              '\n'
+             'Changed in version 3.9: Classes may be decorated with any valid\n'
+             '"assignment_expression". Previously, the grammar was much more\n'
+             'restrictive; see **PEP 614** for details.\n'
+             '\n'
              '**Programmer’s note:** Variables defined in the class definition '
              'are\n'
              'class attributes; they are shared by instances.  Instance '
@@ -4403,8 +4416,8 @@ topics = {'assert': 'The "assert" statement\n'
          '\n'
          'The "if" statement is used for conditional execution:\n'
          '\n'
-         '   if_stmt ::= "if" expression ":" suite\n'
+         '   if_stmt ::= "if" assignment_expression ":" suite\n'
-         '               ("elif" expression ":" suite)*\n'
+         '               ("elif" assignment_expression ":" suite)*\n'
          '               ["else" ":" suite]\n'
          '\n'
          'It selects exactly one of the suites by evaluating the expressions '
@@ -4824,7 +4837,7 @@ topics = {'assert': 'The "assert" statement\n'
               '[","]\n'
               '   starred_expression ::= expression | (starred_item ",")* '
               '[starred_item]\n'
-              '   starred_item       ::= expression | "*" or_expr\n'
+              '   starred_item       ::= assignment_expression | "*" or_expr\n'
               '\n'
               'Except when part of a list or set display, an expression list\n'
               'containing at least one comma yields a tuple.  The length of '
@@ -5134,11 +5147,11 @@ topics = {'assert': 'The "assert" statement\n'
                   'only\n'
                   'supported by the numeric types.\n'
                   '\n'
-                  'A general convention is that an empty format string ("""") '
+                  'A general convention is that an empty format specification '
                   'produces\n'
                   'the same result as if you had called "str()" on the value. '
                   'A non-empty\n'
-                  'format string typically modifies the result.\n'
+                  'format specification typically modifies the result.\n'
                   '\n'
                   'The general form of a *standard format specifier* is:\n'
                   '\n'
@@ -5693,8 +5706,8 @@ topics = {'assert': 'The "assert" statement\n'
              '[parameter_list] ")"\n'
              '               ["->" expression] ":" suite\n'
              '   decorators                ::= decorator+\n'
-             '   decorator                 ::= "@" dotted_name ["(" '
+             '   decorator                 ::= "@" assignment_expression '
-             '[argument_list [","]] ")"] NEWLINE\n'
+             'NEWLINE\n'
              '   dotted_name               ::= identifier ("." identifier)*\n'
              '   parameter_list            ::= defparameter ("," '
              'defparameter)* "," "/" ["," [parameter_list_no_posonly]]\n'
@@ -5748,6 +5761,11 @@ topics = {'assert': 'The "assert" statement\n'
              'the name\n'
              '"func".\n'
              '\n'
+             'Changed in version 3.9: Functions may be decorated with any '
+             'valid\n'
+             '"assignment_expression". Previously, the grammar was much more\n'
+             'restrictive; see **PEP 614** for details.\n'
+             '\n'
              'When one or more *parameters* have the form *parameter* "="\n'
              '*expression*, the function is said to have “default parameter '
              'values.”\n'
@@ -6119,8 +6137,8 @@ topics = {'assert': 'The "assert" statement\n'
        '\n'
        'The "if" statement is used for conditional execution:\n'
        '\n'
-       '   if_stmt ::= "if" expression ":" suite\n'
+       '   if_stmt ::= "if" assignment_expression ":" suite\n'
-       '               ("elif" expression ":" suite)*\n'
+       '               ("elif" assignment_expression ":" suite)*\n'
        '               ["else" ":" suite]\n'
        '\n'
        'It selects exactly one of the suites by evaluating the expressions '
@@ -9018,7 +9036,7 @@ topics = {'assert': 'The "assert" statement\n'
                  '\n'
                  'If the metaclass has no "__prepare__" attribute, then the '
                  'class\n'
-                 'namespace is initialised as an empty "dict()".\n'
+                 'namespace is initialised as an empty ordered mapping.\n'
                  '\n'
                  'See also:\n'
                  '\n'
@@ -11196,10 +11214,17 @@ topics = {'assert': 'The "assert" statement\n'
           'for\n'
           '   the operands provided.  (The interpreter will then try the\n'
           '   reflected operation, or some other fallback, depending on the\n'
-          '   operator.)  Its truth value is true.\n'
+          '   operator.)  It should not be evaluated in a boolean context.\n'
           '\n'
           '   See Implementing the arithmetic operations for more details.\n'
           '\n'
+          '   Changed in version 3.9: Evaluating "NotImplemented" in a '
+          'boolean\n'
+          '   context is deprecated. While it currently evaluates as true, it\n'
+          '   will emit a "DeprecationWarning". It will raise a "TypeError" in '
+          'a\n'
+          '   future version of Python.\n'
+          '\n'
           'Ellipsis\n'
           '   This type has a single value.  There is a single object with '
           'this\n'
@@ -12487,6 +12512,29 @@ topics = {'assert': 'The "assert" statement\n'
                  '         >>> d.values() == d.values()\n'
                  '         False\n'
                  '\n'
+                 '   d | other\n'
+                 '\n'
+                 '      Create a new dictionary with the merged keys and '
+                 'values of *d*\n'
+                 '      and *other*, which must both be dictionaries. The '
+                 'values of\n'
+                 '      *other* take priority when *d* and *other* share '
+                 'keys.\n'
+                 '\n'
+                 '      New in version 3.9.\n'
+                 '\n'
+                 '   d |= other\n'
+                 '\n'
+                 '      Update the dictionary *d* with keys and values from '
+                 '*other*,\n'
+                 '      which may be either a *mapping* or an *iterable* of '
+                 'key/value\n'
+                 '      pairs. The values of *other* take priority when *d* '
+                 'and *other*\n'
+                 '      share keys.\n'
+                 '\n'
+                 '      New in version 3.9.\n'
+                 '\n'
                  '   Dictionaries compare equal if and only if they have the '
                  'same "(key,\n'
                  '   value)" pairs (regardless of ordering). Order comparisons '
@@ -13616,7 +13664,7 @@ topics = {'assert': 'The "assert" statement\n'
           'The "while" statement is used for repeated execution as long as an\n'
           'expression is true:\n'
           '\n'
-          '   while_stmt ::= "while" expression ":" suite\n'
+          '   while_stmt ::= "while" assignment_expression ":" suite\n'
           '                  ["else" ":" suite]\n'
           '\n'
           'This repeatedly tests the expression and, if it is true, executes '

Misc/NEWS.d/next/Build/2020-02-06-18-08-25.bpo-1294959.AZPg4R.rst

@@ -1,6 +0,0 @@
-Add ``--with-platlibdir`` option to the configure script: name of the
-platform-specific library directory, stored in the new :attr:`sys.platlibdir`
-attribute. It is used to build the path of platform-specific dynamic libraries
-and the path of the standard library. It is equal to ``"lib"`` on most
-platforms. On Fedora and SuSE, it is equal to ``"lib64"`` on 64-bit platforms.
-Patch by Jan Matějek, Matěj Cepl, Charalampos Stratakis and Victor Stinner.

Misc/NEWS.d/next/Build/2020-03-02-14-44-09.bpo-39763.GGEwhH.rst

@@ -1,3 +0,0 @@
-setup.py now uses a basic implementation of the :mod:`subprocess` module if
-the :mod:`subprocess` module is not available: before required C extension
-modules are built.

Misc/NEWS.d/next/Build/2020-03-03-15-56-07.bpo-39761.k10aGe.rst

@@ -1 +0,0 @@
-Fix build with DTrace but without additional DFLAGS.

Misc/NEWS.d/next/C API/2019-11-22-14-06-28.bpo-38500.nPEdjH.rst

@@ -1,5 +0,0 @@
-Add a private API to get and set the frame evaluation function: add
-:c:func:`_PyInterpreterState_GetEvalFrameFunc` and
-:c:func:`_PyInterpreterState_SetEvalFrameFunc` C functions.
-The :c:type:`_PyFrameEvalFunction` function type now takes a *tstate*
-parameter.

Misc/NEWS.d/next/C API/2020-02-25-20-10-34.bpo-38913.siF1lS.rst

@@ -1,2 +0,0 @@
-Fixed segfault in ``Py_BuildValue()`` called with a format containing "#"
-and undefined PY_SSIZE_T_CLEAN whwn an exception is set.

Misc/NEWS.d/next/C API/2020-03-02-11-29-45.bpo-39824.71_ZMn.rst

@@ -1,10 +0,0 @@
-Extension modules: :c:member:`~PyModuleDef.m_traverse`,
-:c:member:`~PyModuleDef.m_clear` and :c:member:`~PyModuleDef.m_free` functions
-of :c:type:`PyModuleDef` are no longer called if the module state was requested
-but is not allocated yet. This is the case immediately after the module is
-created and before the module is executed (:c:data:`Py_mod_exec` function). More
-precisely, these functions are not called if :c:member:`~PyModuleDef.m_size` is
-greater than 0 and the module state (as returned by
-:c:func:`PyModule_GetState`) is ``NULL``.
-
-Extension modules without module state (``m_size <= 0``) are not affected.

Misc/NEWS.d/next/C API/2020-03-06-23-56-04.bpo-39882.Iqhcqm.rst

@@ -1,3 +0,0 @@
-The :c:func:`Py_FatalError` function is replaced with a macro which logs
-automatically the name of the current function, unless the ``Py_LIMITED_API``
-macro is defined.

Misc/NEWS.d/next/C API/2020-03-08-22-56-22.bpo-38643.k2ixx6.rst

@@ -1,2 +0,0 @@
-:c:func:`PyNumber_ToBase` now raises a :exc:`SystemError` instead of
-crashing when called with invalid base.

Misc/NEWS.d/next/C API/2020-03-09-20-27-19.bpo-38249.IxYbQy.rst

@@ -1,2 +0,0 @@
-:c:macro:`Py_UNREACHABLE` is now implemented with
-``__builtin_unreachable()`` and analogs in release mode.

Misc/NEWS.d/next/C API/2020-03-10-00-18-16.bpo-39877.GOYtIm.rst

@@ -1,3 +0,0 @@
-Deprecated :c:func:`PyEval_InitThreads` and
-:c:func:`PyEval_ThreadsInitialized`. Calling :c:func:`PyEval_InitThreads` now
-does nothing.

Misc/NEWS.d/next/C API/2020-03-12-00-27-26.bpo-39884.CGOJBO.rst

@@ -1,2 +0,0 @@
-:c:func:`PyDescr_NewMethod` and :c:func:`PyCFunction_NewEx` now include the
-method name in the SystemError "bad call flags" error message to ease debug.

Misc/NEWS.d/next/C API/2020-03-12-23-47-57.bpo-39947.-nCdFV.rst

@@ -1,3 +0,0 @@
-Py_TRASHCAN_BEGIN_CONDITION and Py_TRASHCAN_END macro no longer access
-PyThreadState attributes, but call new private _PyTrash_begin() and
-_PyTrash_end() functions which hide implementation details.

Misc/NEWS.d/next/C API/2020-03-13-00-15-19.bpo-39947.w3dIru.rst

@@ -1,4 +0,0 @@
-Move the static inline function flavor of Py_EnterRecursiveCall() and
-Py_LeaveRecursiveCall() to the internal C API: they access PyThreadState
-attributes. The limited C API provides regular functions which hide
-implementation details.

Misc/NEWS.d/next/C API/2020-03-13-16-44-23.bpo-35370.sXRA-r.rst

@@ -1,2 +0,0 @@
-If :c:func:`PySys_Audit` fails in :c:func:`PyEval_SetProfile` or
-:c:func:`PyEval_SetTrace`, log the error as an unraisable exception.

Misc/NEWS.d/next/C API/2020-03-13-17-43-00.bpo-39947.1Cu_d2.rst

@@ -1 +0,0 @@
-Add :c:func:`PyInterpreterState_Get` function to the limited C API.

Misc/NEWS.d/next/C API/2020-03-13-18-10-58.bpo-39947.gmEAaU.rst

@@ -1,2 +0,0 @@
-Add :c:func:`PyThreadState_GetInterpreter`: get the interpreter of a Python
-thread state.

Misc/NEWS.d/next/C API/2020-03-14-01-56-03.bpo-37207.R3jaTy.rst

@@ -1 +0,0 @@
-Add _PyArg_NoKwnames helper function. Patch by Dong-hee Na.

Misc/NEWS.d/next/C API/2020-03-20-14-55-09.bpo-39947.W7uCJ3.rst

@@ -1,2 +0,0 @@
-Add :c:func:`PyThreadState_GetFrame` function: get the current frame of a
-Python thread state.

Misc/NEWS.d/next/C API/2020-03-20-17-05-52.bpo-39946.3NS-Ls.rst

@@ -1,3 +0,0 @@
-Remove ``_PyRuntime.getframe`` hook and remove ``_PyThreadState_GetFrame``
-macro which was an alias to ``_PyRuntime.getframe``. They were only exposed
-by the internal C API. Remove also ``PyThreadFrameGetter`` type.

Misc/NEWS.d/next/C API/2020-03-20-18-41-33.bpo-40024.9zHpve.rst

@@ -1 +0,0 @@
-Add :c:func:`PyModule_AddType` helper function: add a type to a module. Patch by Dong-hee Na.

Misc/NEWS.d/next/Core and Builtins/2018-09-23-16-32-58.bpo-22490.8e0YDf.rst

@@ -1,2 +0,0 @@
-Don't leak environment variable ``__PYVENV_LAUNCHER__`` into the interpreter
-session on macOS.

Misc/NEWS.d/next/Core and Builtins/2019-05-08-11-11-45.bpo-35712.KJthus.rst

@@ -1,2 +0,0 @@
-Using :data:`NotImplemented` in a boolean context has been deprecated. Patch
-contributed by Josh Rosenberg.

Misc/NEWS.d/next/Core and Builtins/2020-01-06-13-58-37.bpo-39220.KGFovE.rst

@@ -1,2 +0,0 @@
-Do not optimize annotations if 'from __future__ import annotations' is used.
-Patch by Pablo Galindo.

Misc/NEWS.d/next/Core and Builtins/2020-02-02-00-12-07.bpo-39520.uicBq6.rst

@@ -1,2 +0,0 @@
-Fix unparsing of ext slices with no items (``foo[:,]``). Patch by Batuhan
-Taskaya.

Misc/NEWS.d/next/Core and Builtins/2020-02-03-21-12-39.bpo-39087.YnbUpL.rst

@@ -1,2 +0,0 @@
-Optimize :c:func:`PyUnicode_AsUTF8` and :c:func:`PyUnicode_AsUTF8AndSize`
-slightly when they need to create internal UTF-8 cache.

Misc/NEWS.d/next/Core and Builtins/2020-02-05-07-55-57.bpo-1635741.H_tCC9.rst

@@ -1 +0,0 @@
-Port _locale extension module to multiphase initialization (:pep:`489`).

Misc/NEWS.d/next/Core and Builtins/2020-02-14-23-10-07.bpo-38091.pwR0K7.rst

@@ -1 +0,0 @@
-Tweak import deadlock detection code to not deadlock itself.

Misc/NEWS.d/next/Core and Builtins/2020-02-20-08-12-52.bpo-39702.4_AmyF.rst

@@ -1,2 +0,0 @@
-Relax :term:`decorator` grammar restrictions to allow any valid expression
-(:pep:`614`).

Misc/NEWS.d/next/Core and Builtins/2020-02-22-14-33-59.bpo-1635741.BTJ0cX.rst

@@ -1 +0,0 @@
-Port audioop extension module to multiphase initialization (:pep:`489`).

Misc/NEWS.d/next/Core and Builtins/2020-03-02-19-21-21.bpo-39778._YGLEc.rst

@@ -1,2 +0,0 @@
-Fixed a crash due to incorrect handling of weak references in
-``collections.OrderedDict`` classes. Patch by Pablo Galindo.

Misc/NEWS.d/next/Core and Builtins/2020-03-02-20-12-33.bpo-39776.fNaxi_.rst

@@ -1,6 +0,0 @@
-Fix race condition where threads created by PyGILState_Ensure() could get a
-duplicate id.
-
-This affects consumers of tstate->id like the contextvar caching machinery,
-which could return invalid cached objects under heavy thread load (observed
-in embedded scenarios).

Misc/NEWS.d/next/Core and Builtins/2020-03-06-06-12-37.bpo-39871.dCAj_2.rst

@@ -1,3 +0,0 @@
-Fix a possible :exc:`SystemError` in ``math.{atan2,copysign,remainder}()``
-when the first argument cannot be converted to a :class:`float`. Patch by
-Zachary Spytz.

Misc/NEWS.d/next/Core and Builtins/2020-03-06-18-30-00.bpo-39877.bzd1y0.rst

@@ -1,5 +0,0 @@
-Fix :c:func:`PyEval_RestoreThread` random crash at exit with daemon threads.
-It now accesses the ``_PyRuntime`` variable directly instead of using
-``tstate->interp->runtime``, since ``tstate`` can be a dangling pointer after
-:c:func:`Py_Finalize` has been called. Moreover, the daemon thread now exits
-before trying to take the GIL.

Misc/NEWS.d/next/Core and Builtins/2020-03-06-21-04-39.bpo-38894.nfcGKv.rst

@@ -1,4 +0,0 @@
-Fix a bug that was causing incomplete results when calling
-``pathlib.Path.glob`` in the presence of symlinks that point
-to files where the user does not have read access. Patch by Pablo
-Galindo and Matt Wozniski.

Misc/NEWS.d/next/Core and Builtins/2020-03-08-12-11-38.bpo-19466.OdOpXP.rst

@@ -1,3 +0,0 @@
-Clear the frames of daemon threads earlier during the Python shutdown to
-call objects destructors. So "unclosed file" resource warnings are now
-emitted for daemon threads in a more reliable way.

Misc/NEWS.d/next/Core and Builtins/2020-03-10-19-14-42.bpo-39926.H19bAa.rst

@@ -1 +0,0 @@
-Update Unicode database to Unicode version 13.0.0.

Misc/NEWS.d/next/Core and Builtins/2020-03-11-12-28-16.bpo-38373.FE9S21.rst

@@ -1,2 +0,0 @@
-Chaged list overallocation strategy. It no longer overallocates if the new
-size is closer to overalocated size than to the old size and adds padding.

Misc/NEWS.d/next/Core and Builtins/2020-03-12-02-41-12.bpo-37207.ye7OM3.rst

@@ -1,2 +0,0 @@
-Speed up calls to ``tuple()`` by using the :pep:`590` ``vectorcall`` calling
-convention. Patch by Dong-hee Na.

Misc/NEWS.d/next/Core and Builtins/2020-03-12-22-13-50.bpo-39562.E2u273.rst

@@ -1,2 +0,0 @@
-Allow executing asynchronous comprehensions on the top level when the
-``PyCF_ALLOW_TOP_LEVEL_AWAIT`` flag is given. Patch by Batuhan Taskaya.

Misc/NEWS.d/next/Core and Builtins/2020-03-15-03-52-01.bpo-39965.Od3ZdP.rst

@@ -1,3 +0,0 @@
-Correctly raise ``SyntaxError`` if *await* is used inside non-async
-functions and ``PyCF_ALLOW_TOP_LEVEL_AWAIT`` is set (like in the asyncio
-REPL). Patch by Pablo Galindo.

Misc/NEWS.d/next/Core and Builtins/2020-03-15-13-51-10.bpo-39968.f-Xi39.rst

@@ -1 +0,0 @@
-Use inline function to replace extension modules' get_module_state macros.

Misc/NEWS.d/next/Core and Builtins/2020-03-15-20-51-15.bpo-1635741.iH0JND.rst

@@ -1 +0,0 @@
-Port _statistics module to multiphase initialization (:pep:`489`).

Misc/NEWS.d/next/Core and Builtins/2020-03-15-23-16-00.bpo-37207.6XbnQA.rst

@@ -1,2 +0,0 @@
-Speed up calls to ``set()`` by using the :pep:`590` ``vectorcall`` calling
-convention. Patch by Dong-hee Na.

Misc/NEWS.d/next/Core and Builtins/2020-03-17-01-55-33.bpo-39984.y5Chgb.rst

@@ -1,3 +0,0 @@
-subinterpreters: Move ``_PyRuntimeState.ceval.tracing_possible`` to
-``PyInterpreterState.ceval.tracing_possible``: each interpreter now has its own
-variable.

Misc/NEWS.d/next/Core and Builtins/2020-03-17-22-35-29.bpo-37207.sBAV1j.rst

@@ -1,2 +0,0 @@
-Speed up calls to ``frozenset()`` by using the :pep:`590` ``vectorcall``
-calling convention. Patch by Dong-hee Na.

Misc/NEWS.d/next/Core and Builtins/2020-03-18-00-17-26.bpo-1635741.7AtdhP.rst

@@ -1 +0,0 @@
-Port itertools module to multiphase initialization (:pep:`489`).

Misc/NEWS.d/next/Core and Builtins/2020-03-18-19-48-53.bpo-1635741.ELEihr.rst

@@ -1 +0,0 @@
-Port _heapq module to multiphase initialization.

Misc/NEWS.d/next/Core and Builtins/2020-03-19-00-45-37.bpo-39984.u-bHIq.rst

@@ -1,4 +0,0 @@
-If :c:func:`Py_AddPendingCall` is called in a subinterpreter, the function is
-now scheduled to be called from the subinterpreter, rather than being called
-from the main interpreter. Each subinterpreter now has its own list of
-scheduled calls.

Misc/NEWS.d/next/Core and Builtins/2020-03-19-02-26-13.bpo-40010.Y-LIR0.rst

@@ -1,8 +0,0 @@
-Optimize signal handling in multithreaded applications. If a thread different
-than the main thread gets a signal, the bytecode evaluation loop is no longer
-interrupted at each bytecode instruction to check for pending signals which
-cannot be handled. Only the main thread of the main interpreter can handle
-signals.
-
-Previously, the bytecode evaluation loop was interrupted at each instruction
-until the main thread handles signals.

Misc/NEWS.d/next/Core and Builtins/2020-03-19-23-34-22.bpo-1635741.ayunLM.rst

@@ -1 +0,0 @@
-Port _collections module to multiphase initialization (:pep:`489`).

Misc/NEWS.d/next/Core and Builtins/2020-03-20-13-42-35.bpo-1635741.bhIu5M.rst

@@ -1 +0,0 @@
-Port _weakref extension module to multiphase initialization (:pep:`489`).

Misc/NEWS.d/next/Core and Builtins/2020-03-20-13-51-55.bpo-40010.QGf5s8.rst

@@ -1,8 +0,0 @@
-Optimize pending calls in multithreaded applications. If a thread different
-than the main thread schedules a pending call (:c:func:`Py_AddPendingCall`),
-the bytecode evaluation loop is no longer interrupted at each bytecode
-instruction to check for pending calls which cannot be executed. Only the
-main thread can execute pending calls.
-
-Previously, the bytecode evaluation loop was interrupted at each instruction
-until the main thread executes pending calls.

Misc/NEWS.d/next/Documentation/2020-02-18-14-28-31.bpo-39677.vNHqoX.rst

@@ -1 +0,0 @@
-Changed operand name of **MAKE_FUNCTION** from *argc* to *flags* for module :mod:`dis`

Misc/NEWS.d/next/Documentation/2020-02-21-22-05-20.bpo-39718.xtBoSi.rst

@@ -1 +0,0 @@
-Update :mod:`token` documentation to reflect additions in Python 3.8

Misc/NEWS.d/next/Documentation/2020-02-23-13-26-40.bpo-39530._bCvzQ.rst

@@ -1 +0,0 @@
-Fix misleading documentation about mixed-type numeric comparisons.

Misc/NEWS.d/next/Documentation/2020-02-27-17-35-27.bpo-17422.eS1hVh.rst

@@ -1,2 +0,0 @@
-The language reference no longer restricts default class namespaces to dicts
-only.

Misc/NEWS.d/next/Documentation/2020-02-28-14-39-25.bpo-13790.hvLaRI.rst

@@ -1 +0,0 @@
-Change 'string' to 'specification' in format doc.

Misc/NEWS.d/next/Documentation/2020-03-05-16-29-03.bpo-39868.JQoHhO.rst

@@ -1 +0,0 @@
-Updated the Language Reference for :pep:`572`.

Misc/NEWS.d/next/IDLE/2020-02-27-22-17-09.bpo-39781.bbYBeL.rst

@@ -1 +0,0 @@
-Selecting code context lines no longer causes a jump.

Misc/NEWS.d/next/IDLE/2020-03-06-01-55-14.bpo-39852.QjA1qF.rst

@@ -1,2 +0,0 @@
-Edit "Go to line" now clears any selection, preventing accidental deletion.
-It also updates Ln and Col on the status bar.

Misc/NEWS.d/next/IDLE/2020-03-08-14-27-36.bpo-39885.29ERiR.rst

@@ -1,2 +0,0 @@
-Since clicking to get an IDLE context menu moves the cursor,
-any text selection should be and now is cleared.

Misc/NEWS.d/next/IDLE/2020-03-09-02-45-12.bpo-27115.8hSHMo.rst

@@ -1,2 +0,0 @@
-For 'Go to Line', use a Query box subclass with IDLE standard behavior
-and improved error checking.

Misc/NEWS.d/next/Library/2018-09-27-19-31-47.bpo-34822.EztBhL.rst

@@ -1,5 +0,0 @@
-Simplified AST for subscription. Simple indices are now represented by their
-value, extended slices are represented as tuples.  :mod:`ast` classes
-``Index`` and ``ExtSlice`` are considered deprecated and will be removed in
-future Python versions. In the meantime, ``Index(value)`` now returns
-a ``value`` itself, ``ExtSlice(slices)`` returns ``Tuple(slices, Load())``.

Misc/NEWS.d/next/Library/2019-07-17-08-26-14.bpo-34788.pwV1OK.rst

@@ -1,2 +0,0 @@
-Add support for scoped IPv6 addresses to :mod:`ipaddress`. Patch by Oleksandr 
-Pavliuk.

Misc/NEWS.d/next/Library/2019-08-20-00-02-37.bpo-37534.TvjAUi.rst

@@ -1,2 +0,0 @@
-When using minidom module to generate XML documents the ability to add Standalone Document Declaration is added.
-All the changes are made to generate a document in compliance with Extensible Markup Language (XML) 1.0 (Fifth Edition) W3C Recommendation (available here: https://www.w3.org/TR/xml/#sec-prolog-dtd).

Misc/NEWS.d/next/Library/2019-10-30-15-31-09.bpo-38641.HrTL9k.rst

@@ -1,2 +0,0 @@
-Added starred expressions support to ``return`` and ``yield`` statements for
-``lib2to3``. Patch by Vlad Emelianov.

Misc/NEWS.d/next/Library/2019-12-20-16-06-28.bpo-38971.fKRYlF.rst

@@ -1,3 +0,0 @@
-Open issue in the BPO indicated a desire to make the implementation of
-codecs.open() at parity with io.open(), which implements a try/except to
-assure file stream gets closed before an exception is raised.

Misc/NEWS.d/next/Library/2020-01-30-07-02-02.bpo-39495.8LsIRN.rst

@@ -1 +0,0 @@
-Remove default value from *attrs* parameter of :meth:`xml.etree.ElementTree.TreeBuilder.start` for consistency between Python and C implementations.

Misc/NEWS.d/next/Library/2020-01-31-14-24-05.bpo-39507.3oln1a.rst

@@ -1 +0,0 @@
-Adding HTTP status 418 "I'm a Teapot" to HTTPStatus in http library. Patch by Ross Rhodes.

Misc/NEWS.d/next/Library/2020-02-01-00-03-06.bpo-39509.-YxUSf.rst

@@ -1,2 +0,0 @@
-HTTP status codes ``103 EARLY_HINTS`` and ``425 TOO_EARLY`` are added to
-:class:`http.HTTPStatus`. Patch by Dong-hee Na.

Misc/NEWS.d/next/Library/2020-02-06-05-33-52.bpo-39548.DF4FFe.rst

@@ -1,2 +0,0 @@
-Fix handling of header in :class:`urllib.request.AbstractDigestAuthHandler` when the optional ``qop`` parameter
-is not present.

Misc/NEWS.d/next/Library/2020-02-11-19-45-31.bpo-39609.dk40Uw.rst

@@ -1 +0,0 @@
-Add thread_name_prefix to default asyncio executor

Misc/NEWS.d/next/Library/2020-02-15-15-29-34.bpo-39639.3mqJjm.rst

@@ -1 +0,0 @@
-Deprecated ``ast.Suite`` node class because it's no longer used. Patch by Batuhan Taskaya.

Misc/NEWS.d/next/Library/2020-02-15-20-38-11.bpo-39638.wm_RS3.rst

@@ -1,2 +0,0 @@
-Keep ASDL signatures in the docstrings for ``AST`` nodes. Patch by Batuhan
-Taskaya

Misc/NEWS.d/next/Library/2020-02-17-22-38-15.bpo-39667.QuzEHH.rst

@@ -1 +0,0 @@
-Improve pathlib.Path compatibility on zipfile.Path and correct performance degradation as found in zipp 3.0.

Misc/NEWS.d/next/Library/2020-02-21-22-35-57.bpo-39719.2jLy1C.rst

@@ -1 +0,0 @@
-Remove :meth:`tempfile.SpooledTemporaryFile.softspace` as files no longer have the ``softspace`` attribute in Python 3. Patch by Shantanu.

Misc/NEWS.d/next/Library/2020-02-23-02-09-03.bpo-38691.oND8Sk.rst

@@ -1,3 +0,0 @@
-The :mod:`importlib` module now ignores the :envvar:`PYTHONCASEOK`
-environment variable when the :option:`-E` or :option:`-I` command line
-options are being used.

Misc/NEWS.d/next/Library/2020-02-25-09-28-06.bpo-36144.Rbvvi7.rst

@@ -1,2 +0,0 @@
-:class:`types.MappingProxyType` objects now support the merge (``|``) operator
-from :pep:`584`.

Misc/NEWS.d/next/Library/2020-02-27-00-40-21.bpo-39769.hJmxu4.rst

@@ -1,4 +0,0 @@
-The :func:`compileall.compile_dir` function's *ddir* parameter and the
-compileall command line flag `-d` no longer write the wrong pathname to the
-generated pyc file for submodules beneath the root of the directory tree
-being compiled.  This fixes a regression introduced with Python 3.5.

Misc/NEWS.d/next/Library/2020-02-27-18-21-07.bpo-39764.wqPk68.rst

@@ -1 +0,0 @@
-Fix AttributeError when calling get_stack on a PyAsyncGenObject Task

Misc/NEWS.d/next/Library/2020-02-28-12-59-30.bpo-39678.3idfxM.rst

@@ -1,2 +0,0 @@
-Refactor queue_manager in :class:`concurrent.futures.ProcessPoolExecutor` to
-make it easier to maintain.

Misc/NEWS.d/next/Library/2020-02-28-16-42-16.bpo-39775.IuSvVb.rst

@@ -1,2 +0,0 @@
-Change ``inspect.Signature.parameters`` back to ``collections.OrderedDict``.
-This was changed to ``dict`` in Python 3.9.0a4.

Misc/NEWS.d/next/Library/2020-02-29-11-20-50.bpo-39517.voQZb8.rst

@@ -1 +0,0 @@
-Fix runpy.run_path() when using pathlike objects

Misc/NEWS.d/next/Library/2020-02-29-15-54-08.bpo-36144.4GgTZs.rst

@@ -1 +0,0 @@
-:class:`collections.defaultdict` now implements ``|`` (:pep:`584`).

Misc/NEWS.d/next/Library/2020-02-29-19-17-39.bpo-39794.7VjatS.rst

@@ -1,2 +0,0 @@
-Add --without-decimal-contextvar build option.  This enables a thread-local
-rather than a coroutine local context.

Misc/NEWS.d/next/Library/2020-03-02-14-43-19.bpo-39763.5a822c.rst

@@ -1,2 +0,0 @@
-Reimplement :func:`distutils.spawn.spawn` function with the
-:mod:`subprocess` module.

Misc/NEWS.d/next/Library/2020-03-02-15-15-01.bpo-39826.DglHk7.rst

@@ -1 +0,0 @@
-Add getConnection method to logging HTTPHandler to enable custom connections.

Misc/NEWS.d/next/Library/2020-03-02-23-52-38.bpo-28577.EK91ae.rst

@@ -1 +0,0 @@
-The hosts method on 32-bit prefix length IPv4Networks and 128-bit prefix IPv6Networks now returns a list containing the single Address instead of an empty list.

Misc/NEWS.d/next/Library/2020-03-03-16-21-41.bpo-39674.HJVkD5.rst

@@ -1,3 +0,0 @@
-Revert "bpo-37330: open() no longer accept 'U' in file mode". The "U" mode of
-open() is kept in Python 3.9 to ease transition from Python 2.7, but will be
-removed in Python 3.10.

Misc/NEWS.d/next/Library/2020-03-04-16-10-59.bpo-13487.gqe4Fb.rst

@@ -1,3 +0,0 @@
-Avoid a possible *"RuntimeError: dictionary changed size during iteration"*
-from :func:`inspect.getmodule` when it tried to loop through
-:attr:`sys.modules`.

Misc/NEWS.d/next/Library/2020-03-05-00-57-49.bpo-39828.yWq9NJ.rst

@@ -1 +0,0 @@
-Fix :mod:`json.tool` to catch :exc:`BrokenPipeError`. Patch by Dong-hee Na.

Misc/NEWS.d/next/Library/2020-03-07-16-44-51.bpo-39889.3RYqeX.rst

@@ -1,3 +0,0 @@
-Fixed :func:`ast.unparse` for extended slices containing a single element
-(e.g. ``a[i:j,]``). Remove redundant tuples when index with a tuple (e.g.
-``a[i, j]``).

Misc/NEWS.d/next/Library/2020-03-08-09-53-55.bpo-36287.mxr5m8.rst

@@ -1,4 +0,0 @@
-:func:`ast.dump()` no longer outputs optional fields and attributes with
-default values. The default values for optional fields and attributes of
-AST nodes are now set as class attributes (e.g. ``Constant.kind`` is set
-to ``None``).

Misc/NEWS.d/next/Library/2020-03-09-01-45-06.bpo-39850.eaJNIE.rst

@@ -1,5 +0,0 @@
-:mod:`multiprocessing` now supports abstract socket addresses (if abstract sockets
-are supported in the running platform). When creating arbitrary addresses (like when
-default-constructing :class:`multiprocessing.connection.Listener` objects) abstract
-sockets are preferred to avoid the case when the temporary-file-generated address is
-too large for an AF_UNIX socket address. Patch by Pablo Galindo.

Misc/NEWS.d/next/Library/2020-03-09-18-56-27.bpo-39916.BHHyp3.rst

@@ -1,2 +0,0 @@
-More reliable use of ``os.scandir()`` in ``Path.glob()``. It no longer emits
-a ResourceWarning when interrupted.

Misc/NEWS.d/next/Library/2020-03-10-12-52-06.bpo-38075.qbESAF.rst

@@ -1,2 +0,0 @@
-Fix the :meth:`random.Random.seed` method when a :class:`bool` is passed as the
-seed.

Misc/NEWS.d/next/Library/2020-03-10-15-32-31.bpo-38662.o1DMXj.rst

@@ -1,4 +0,0 @@
-The ``ensurepip`` module now invokes ``pip`` via the ``runpy`` module.
-Hence it is no longer tightly coupled with the internal API of the bundled
-``pip`` version, allowing easier updates to a newer ``pip`` version both
-internally and for distributors.