Commit Graph

3504 Commits

Author SHA1 Message Date
Victor Stinner bbe7497c5a
bpo-45434: Remove pystrhex.h header file (GH-28923)
Move Include/pystrhex.h to Include/internal/pycore_strhex.h.
The header file only contains private functions.

The following C extensions are now built with Py_BUILD_CORE_MODULE
macro defined to get access to the internal C API:

* _blake2
* _hashopenssl
* _md5
* _sha1
* _sha3
* _ssl
* binascii
2021-10-13 15:22:35 +02:00
Mike Gilbert be21706f37
bpo-45433: Do not link libpython against libcrypt (GH-28881)
Save/restore LIBS when calling AC_SEARCH_LIBS(..., crypt). This avoid
linking libpython with libcrypt.
2021-10-12 01:24:03 +02:00
Victor Stinner 1f316ea3b4
bpo-41123: Remove Py_UNICODE_COPY() and Py_UNICODE_FILL() (GH-28887) 2021-10-11 23:36:37 +02:00
Victor Stinner 03ea862b8a
bpo-45434: Python.h no longer includes <stdlib.h> (GH-28888) 2021-10-11 23:30:00 +02:00
Victor Stinner 2f92e2a590
bpo-45412: Remove Py_SET_ERRNO_ON_MATH_ERROR() macro (GH-28820)
Remove the following math macros using the errno variable:

* Py_ADJUST_ERANGE1()
* Py_ADJUST_ERANGE2()
* Py_OVERFLOWED()
* Py_SET_ERANGE_IF_OVERFLOW()
* Py_SET_ERRNO_ON_MATH_ERROR()

Create pycore_pymath.h internal header file.

Rename Py_ADJUST_ERANGE1() and Py_ADJUST_ERANGE2() to
_Py_ADJUST_ERANGE1() and _Py_ADJUST_ERANGE2(), and convert these
macros to static inline functions.

Move the following macros to pycore_pymath.h:

* _Py_IntegralTypeSigned()
* _Py_IntegralTypeMax()
* _Py_IntegralTypeMin()
* _Py_InIntegralTypeRange()
2021-10-11 21:00:25 +02:00
Inada Naoki ad970e8623
bpo-29410: Change the default hash algorithm to SipHash13. (GH-28752)
Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
Co-authored-by: Christian Heimes <christian@python.org>
2021-10-10 17:29:46 +09:00
Landon Yarrington 5b4a7675bc
Fix dataclassses spelling (GH-28837) 2021-10-09 15:17:52 -04:00
Pablo Galindo Salgado 32485cecab
Remove draft notice on the 3.10 What's new document (GH-28806)
Automerge-Triggered-By: GH:pablogsal
2021-10-07 11:00:29 -07:00
Christian Clauss 241bda785a
[doc] Fix typos found using codespell (GH-28744)
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
2021-10-05 23:48:44 +02:00
Victor Stinner 1ee0f94d16
bpo-41710: PyThread_acquire_lock_timed() uses sem_clockwait() (GH-28662)
On Unix, if the sem_clockwait() function is available in the C
library (glibc 2.30 and newer), the threading.Lock.acquire() method
now uses the monotonic clock (time.CLOCK_MONOTONIC) for the timeout,
rather than using the system clock (time.CLOCK_REALTIME), to not be
affected by system clock changes.

configure now checks if the sem_clockwait() function is available.
2021-10-01 09:55:28 +02:00
Serhiy Storchaka 233b9da07d
[docs] Use full names for time units (GH-28611)
Use "second", "millisecond", "microsecond", "nanosecond" instead of
"sec", "ms", "msec", "us", "ns", etc.
2021-09-29 12:09:56 +03:00
Serhiy Storchaka 4f05f15d7b
[docs] Improve the markup of powers (GH-28598) 2021-09-28 22:40:57 +02:00
Jörn Heissler 953e733e6d
Fix typo in whatsnew: "ns" is 10^-9 secs and "us" is 10^-6 secs. (GH-28565) 2021-09-28 13:25:15 +03:00
Victor Stinner 7834ff26cb
bpo-21302: Add nanosleep() implementation for time.sleep() in Unix (GH-28545)
Co-authored-by: Livius <egyszeregy@freemail.hu>
2021-09-25 14:36:26 +02:00
Terry Jan Reedy 71f8ff45c6
bpo-43914: Whats New 310: add new SyntaxError attributes (GH-28558)
Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
2021-09-25 11:04:13 +02:00
Antony Lee 6587fc60d4
bpo-44019: Implement operator.call(). (GH-27888)
Having `operator.call(obj, arg)` mean `type(obj).__call__(obj, arg)` is
consistent with the other dunder operators.  The semantics with `*args,
**kwargs` then follow naturally from the single-arg semantics.
2021-09-24 16:22:49 +01:00
Victor Stinner f4ccb79d52
bpo-43760: Document PyThreadState.use_tracing removal (GH-28527) 2021-09-23 16:38:31 +02:00
Victor Stinner ec7ffa4b5b
bpo-41137: Reorganize What's New in Python 3.11 (GH-28518)
* Merge the two Removed sections.
* Move "Build Changes" at the end, before "C API Changes".
* Move the pdb change in Porting to Python 3.11.
* Move C API new features in their section.
2021-09-23 11:37:39 +02:00
Victor Stinner 58f8adfda3
bpo-21302: time.sleep() uses waitable timer on Windows (GH-28483)
On Windows, time.sleep() now uses a waitable timer which has a
resolution of 100 ns (10^-7 sec). Previously, it had a solution of 1
ms (10^-3 sec).

* On Windows, time.sleep() now calls PyErr_CheckSignals() before
  resetting the SIGINT event.
* Add _PyTime_As100Nanoseconds() function.
* Complete and update time.sleep() documentation.

Co-authored-by: Livius <egyszeregy@freemail.hu>
2021-09-22 16:09:30 +02:00
Serhiy Storchaka b0a6ede3d0
bpo-45162: Remove many old deprecated unittest features (GH-28268)
* "fail*" and "assert*" aliases of TestCase methods.
* Broken from start TestCase method assertDictContainsSubset().
* Ignored TestLoader.loadTestsFromModule() parameter use_load_tests.
* Old alias _TextTestResult of TextTestResult.
2021-09-17 13:33:27 +03:00
Erlend Egeberg Aasland ff6d2cc55a
bpo-5846: Deprecate obsolete methods in `unittest` (GH-28299)
Deprecate makeSuite, findTestCases, and getTestCaseNames. Scheduled for removal in Python 3.13.
2021-09-15 20:33:31 +02:00
Pablo Galindo Salgado 1aaa859497
bpo-4356: Mention the new key arguments for the bisect module APIs in the 3.10 What's new (GH-28339) 2021-09-14 20:53:14 +01:00
Benjamin Peterson 024fda47d4
closes bpo-45190: Update Unicode data to version 14.0.0. (GH-28336) 2021-09-14 11:00:38 -07:00
Hugo van Kemenade 1fc41ae870
bpo-45173 Remove configparser deprecations (GH-28292)
In the configparser module, these have been deprecated since Python 3.2:

* the SafeConfigParser class,
* the filename property of the ParsingError class,
* the readfp method of the ConfigParser class,
2021-09-13 19:12:36 +02:00
Victor Stinner 85dc53a463
bpo-21302: Update time.sleep() doc for clock_nanosleep() (GH-28311)
Clean-up also What's New in Python 3.11 doc: move entries to the
correct sections.
2021-09-13 17:40:25 +02:00
Dong-hee Na 5277ffe12d
bpo-44987: Fix typo whatsnew 3.11 (GH-28293) 2021-09-12 04:05:55 +09:00
Dong-hee Na 9abd07e596
bpo-44987: Speed up unicode normalization of ASCII strings (GH-28283) 2021-09-11 18:04:38 +03:00
Pablo Galindo Salgado ab327f2929
bpo-44964: Correct the note about the f_lasti field (GH-28208) 2021-09-10 17:53:42 +02:00
D.Lintin 7366854135
Fix minor typo in 3.10.rst (GH-28253) 2021-09-09 12:02:01 -04:00
Erlend Egeberg Aasland f235dd0784
bpo-38371: Remove deprecated `tkinter` split() method (GH-28237) 2021-09-08 23:02:19 +03:00
Dong-hee Na 84ca5fcd31
bpo-44340: Update whatsnews for ThinLTO (GH-28229)
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
2021-09-08 19:29:33 +02:00
Hugo van Kemenade 59ea704df7
bpo-45129 Remove deprecated reuse_address (GH-28207)
Due to significant security concerns, the reuse_address parameter of
asyncio.loop.create_datagram_endpoint, deprecated in Python 3.9, is
now removed. This is because of the behavior of the socket option
SO_REUSEADDR in UDP.

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
2021-09-08 18:58:43 +02:00
Hugo van Kemenade d003a5bd25
bpo-45132 Remove deprecated __getitem__ methods (GH-28225)
Remove deprecated __getitem__ methods of xml.dom.pulldom.DOMEventStream,
wsgiref.util.FileWrapper and fileinput.FileInput, deprecated since Python 3.9.
2021-09-08 13:07:40 +03:00
Victor Stinner cb15afcccf
bpo-39573: Py_TYPE becomes a static inline function (GH-28128)
Convert the Py_TYPE() and Py_SIZE() macros to static inline
functions. The Py_SET_TYPE() and Py_SET_SIZE() functions must now be
used to set an object type and size.
2021-09-08 11:59:13 +02:00
Pablo Galindo Salgado fa2c0b85a8
bpo-44964: Add a note explaining the new semantics of f_last_i in frame objects (GH-28200) 2021-09-07 12:18:54 +01:00
Hugo van Kemenade eb254b43d2
bpo-45124: Remove the bdist_msi command (GH-28195)
The bdist_msi command, deprecated in Python 3.9, is now removed.
Use bdist_wheel (wheel packages) instead.
2021-09-07 12:34:27 +02:00
Eric V. Smith a1ba3597d2
Add What's New for dataclass keyword-only parameters. (GH-28158) 2021-09-04 14:58:17 -04:00
Dong-hee Na bc1c49fa94
bpo-42255: Deprecate webbrowser.MacOSX from Python 3.11 (GH-27837)
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
2021-09-03 18:21:03 +02:00
Victor Stinner 19ba2122ac
bpo-37330: open() no longer accept 'U' in file mode (GH-28118)
open(), io.open(), codecs.open() and fileinput.FileInput no longer
accept "U" ("universal newline") in the file mode. This flag was
deprecated since Python 3.3.
2021-09-02 12:58:00 +02:00
Victor Stinner a806608705
bpo-45085: Remove the binhex module (GH-28117)
The binhex module, deprecated in Python 3.9, is now removed. The
following binascii functions, deprecated in Python 3.9, are now also
removed:

* a2b_hqx(), b2a_hqx();
* rlecode_hqx(), rledecode_hqx().

The binascii.crc_hqx() function remains available.
2021-09-02 12:10:08 +02:00
Victor Stinner d589a7e7eb
bpo-40360: Deprecate the lib2to3 package (GH-28116) 2021-09-02 11:46:47 +02:00
Erlend Egeberg Aasland 86d8b46523
bpo-16379: expose SQLite error codes and error names in `sqlite3` (GH-27786) 2021-08-30 19:32:21 +01:00
Dong-hee Na c764dfbcbc
bpo-45000: Update whatsnews about deleting __debug__ (GH-27956) 2021-08-26 09:36:16 +09:00
Dong-hee Na 551da597a0
bpo-45000: Raise SyntaxError when try to delete __debug__ (GH-27947)
Automerge-Triggered-By: GH:pablogsal
2021-08-25 10:54:20 -07:00
Ken Jin 1a995b0cee
bpo-38291: Update 3.10 WhatsNew with typing.{io|re} DeprecationWarning (GH-27872) 2021-08-23 19:13:51 +02:00
Dong-hee Na 24b63c695a
bpo-24234: Implement bytes.__bytes__ (GH-27901) 2021-08-23 19:01:51 +09:00
andrei kulakov b1db308c61
bpo-41322: Add unit tests for deprecation of test return values (GH-27846)
Also fix the traceback of warnings.
2021-08-22 21:32:45 +03:00
Łukasz Langa 0fd66e46b2
bpo-36384: [doc] Mention CVE-2021-29921 fix in 3.8.12 (GH-27824) 2021-08-19 10:55:49 +02:00
Irit Katriel 31ee985db8
bpo-44874: deprecate Py_TRASHCAN_SAFE_BEGIN and Py_TRASHCAN_SAFE_END (GH-27693)
Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
2021-08-18 21:50:19 +02:00
Hai Shi 3e2c643ae0
bpo-42035: Add PyType_GetQualName() to get a type's qualified name. (GH-27551) 2021-08-17 15:39:34 +02:00
Victor Stinner 4d77691172
bpo-44584: Deprecate PYTHONTHREADDEBUG env var (GH-27065)
The threading debug (PYTHONTHREADDEBUG environment variable) is
deprecated in Python 3.10 and will be removed in Python 3.12. This
feature requires a debug build of Python.
2021-08-06 13:11:12 +02:00
Inada Naoki ce5e1a6809
bpo-41103: Resurrect the old buffer protocol. (GH-27437)
Revert "bpo-41103: Remove old buffer protocol support (#21117)"

This reverts commit 6f8a6ee59c.
2021-07-29 12:46:47 +02:00
Hai Shi a390ebea17
bpo-42035: Add a PyType_GetName() to get type's short name. (GH-23903) 2021-07-29 09:57:02 +02:00
Erlend Egeberg Aasland 5269c09145
bpo-44688: Remove ASCII limitation from `sqlite3` collation names (GH-27395) 2021-07-29 09:47:56 +02:00
Mariusz Felisiak 2e41df4d60
bpo-44740: Make minor edits to lowercasing "internet" and "web". (GH-27385)
Follow up to 11749e2dc2
2021-07-27 10:57:52 +02:00
Mariusz Felisiak 11749e2dc2
bpo-44740: Lowercase "internet" and "web" where appropriate. (#27378)
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
2021-07-27 00:11:55 +02:00
Yurii Karabas 6c1b57d958
bpo-44490: Add 'Whats New' docs regarding types.Union changes (GH-27215) 2021-07-26 18:05:55 +02:00
Dong-hee Na 4463fa2fa1
bpo-44611: Update docs for os and whatsnew 3.11 (#27314) 2021-07-24 11:14:08 +02:00
Dong-hee Na 906fe47083
bpo-44611: Use BCryptGenRandom instead of CryptGenRandom on Windows (GH-27168) 2021-07-23 23:04:30 +09:00
Pablo Galindo Salgado 2b47af6398
Add release highlights for the 3.10 what's new document (GH-27150) 2021-07-14 23:19:55 +01:00
Serhiy Storchaka 054e9c84ac
bpo-33346: Allow async comprehensions inside implicit async comprehensions (GH-6766)
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
2021-07-13 22:27:50 +01:00
Ammar Askar 9c3eaf88dc
bpo-43950: Add documentation for PEP-657 (GH-27047)
Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
Co-authored-by: Batuhan Taskaya <batuhanosmantaskaya@gmail.com>
2021-07-13 01:29:39 +01:00
Erlend Egeberg Aasland a3739b207a
bpo-43908: Immutable types inherit vectorcall (GH-27001)
Heap types with the Py_TPFLAGS_IMMUTABLETYPE flag can now inherit the
PEP 590 vectorcall protocol.  Previously, this was only possible for static types.

Co-authored-by: Victor Stinner <vstinner@python.org>
2021-07-08 12:48:01 +02:00
Srinivas Reddy Thatiparthy (శ్రీనివాస్ రెడ్డి తాటిపర్తి) 58248d9437
bpo-41137: Use utf-8 encoding while reading .pdbrc files (GH-21263) 2021-07-08 16:16:08 +09:00
Illia Volochii ddd5f36971
bpo-43234: Prohibit non-ThreadPoolExecutor in loop.set_default_executor (GH-24540) 2021-07-01 17:46:49 +03:00
Illia Volochii a1092f6249
bpo-43216: Remove @asyncio.coroutine (GH-26369)
Remove the @asyncio.coroutine decorator
enabling legacy generator-based coroutines to be compatible with async/await
code; remove asyncio.coroutines.CoroWrapper used for wrapping
legacy coroutine objects in the debug mode.

The decorator has been deprecated
since Python 3.8 and the removal was initially scheduled for Python 3.10.
2021-07-01 15:13:59 +02:00
Julien Palard 50148cacfa
Doc: Remove trailing whitespaces. (GH-26953) 2021-06-29 13:16:53 +02:00
Serhiy Storchaka 6cb145d23f
bpo-44471: Change error type for bad objects in ExitStack.enter_context() (GH-26820)
A TypeError is now raised instead of an AttributeError in
ExitStack.enter_context() and AsyncExitStack.enter_async_context()
for objects which do not support the context manager or
asynchronous context manager protocols correspondingly.
2021-06-29 11:28:15 +03:00
Serhiy Storchaka 20a88004ba
bpo-12022: Change error type for bad objects in "with" and "async with" (GH-26809)
A TypeError is now raised instead of an AttributeError in
"with" and "async with" statements for objects which do not
support the context manager or asynchronous context manager
protocols correspondingly.
2021-06-29 11:27:04 +03:00
Rodrigo Girão Serrão dcb1caef5b
[doc] Fix typo in what's new in 3.10 (GH-26911)
The `try` statement was missing a colon and therefore was not exemplifying the correct `SyntaxError`.
2021-06-28 23:02:18 +01:00
Jason R. Coombs efe7d08d17
bpo-44464: Remove special exclusion for flake8 in the deprecation warnings. (#26807)
Sync with importlib_metadata 4.6.
2021-06-27 17:59:18 -04:00
Barry Warsaw 8488b85c63
bpo-44498: Issue a deprecation warning on asynchat, asyncore and smtpd import (#26882)
* Issue a deprecation warning on smtpd import

* Also issue DeprecationWarnings for asynchat and asyncore

* Fix some tests

* test___all__ requires the word 'module' or 'package' in the deprecation
  warning text, so add those to smtpd, asynchat, and asyncore.
* In test_support, use pprint now instead of asyncore as the landmark.

* Add What's New

* Use ..deprecated::

* Use ..deprecated::

* Update Lib/smtpd.py

Co-authored-by: Miro Hrončok <miro@hroncok.cz>

* Update Doc/library/smtpd.rst

Co-authored-by: Miro Hrončok <miro@hroncok.cz>

* Import async{hat,ore} after the DeprecationWarning for this module

Co-authored-by: Miro Hrončok <miro@hroncok.cz>
2021-06-24 12:37:26 -07:00
Erlend Egeberg Aasland b19f455339
bpo-44491: Allow clearing the sqlite3 authoriser callback (GH-26863) 2021-06-24 15:35:57 +01:00
Arnon Yaari 599c07006a
Fix typo in whatsnew 3.10.rst (GH-26854)
Thanks for the fix @wiggin15 .
2021-06-24 10:01:42 -03:00
Petr Viktorin 29987f7265
bpo-40939: Remove documentation for `PyParser_*` & add porting notes (GH-26855)
I tried to be relatively thorough and give lots of links.
One reason is that this wasn't deprecated very long; also it seems people running into this tend to not be familiar with similar APIs.

Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
2021-06-24 14:57:28 +02:00
Victor Stinner d19163912b
bpo-44466: Faulthandler now detects the GC (GH-26823)
The faulthandler module now detects if a fatal error occurs during a
garbage collector collection (only if all_threads is true).
2021-06-21 13:15:40 +02:00
Georg Sauthoff a317778fd5
bpo-44077: Expose IP_RECVTOS in the socket module (GH-25992)
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
2021-06-20 21:08:07 +01:00
Hemangii 7265b277fa
Fix typos and grammatical changes in the 3.10 what's new document (GH-26319) 2021-06-20 20:46:59 +01:00
Pablo Galindo 83c9dad8da
Add a note about NameError/AttributeError suggestions with custom error functions (GH-26794) 2021-06-18 23:08:38 +01:00
Mark Dickinson 1d10bf0bb9
bpo-43475: Add what's new entry for NaN hash changes (GH-26725) 2021-06-15 19:48:35 +01:00
Mark Dickinson 4a42cebf6d
bpo-44339: Fix math.pow corner case to comply with IEEE 754 (GH-26606)
Change the behaviour of `math.pow(0.0, -math.inf)` and `math.pow(-0.0, -math.inf)` to return positive infinity instead of raising `ValueError`. This makes `math.pow` consistent with the built-in `pow` (and the `**` operator) for this particular special case, and brings the `math.pow` special-case handling into compliance with IEEE 754.
2021-06-12 10:23:02 +01:00
Christian Heimes e26014f1c4
bpo-44362: ssl: improve deprecation warnings and docs (GH-26646)
Signed-off-by: Christian Heimes <christian@python.org>
2021-06-11 09:15:48 +02:00
Ajith Ramachandran ac867f10b4
bpo-44357:Add `math.cbrt()` function: Cube Root (GH-26622)
* Add math.cbrt() function: Cube Root

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
2021-06-10 17:42:09 +01:00
Dong-hee Na 309ab61602
bpo-35800: Remove smtpd.MailmanProxy since 3.11 (GH-26617) 2021-06-10 08:12:41 +09:00
Serhiy Storchaka 2ea6d89028
bpo-43833: Emit warnings for numeric literals followed by keyword (GH-25466)
Emit a deprecation warning if the numeric literal is immediately followed by
one of keywords: and, else, for, if, in, is, or. Raise a syntax error with
more informative message if it is immediately followed by other keyword or
identifier.

Automerge-Triggered-By: GH:pablogsal
2021-06-08 16:31:10 -07:00
Petr Viktorin 257e400a19
bpo-43795: Note Stable ABI PEP in What's New (GH-26479)
Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
2021-06-08 17:20:07 +02:00
Pablo Galindo 6d518bb3a1
bpo-44348: Revert "bpo-39573: Py_TYPE becomes a static inline function (GH-26493)" (GH-26596)
This reverts commit f3fa63ec75 as is
causing crashes in some Windows tests in the buildbots.
2021-06-08 12:24:40 +01:00
Sergey B Kirpichev 89e50ab36f
bpo-44258: support PEP 515 for Fraction's initialization from string (GH-26422)
* bpo-44258: support PEP 515 for Fraction's initialization from string

* regexps's version

* A different regexps version, which doesn't suffer from catastrophic backtracking

* revert denom -> den

* strip "_" from the decimal str, add few tests

* drop redundant tests

* Add versionchanged & whatsnew entry

* Amend Fraction constructor docs

* Change .. versionchanged:...
2021-06-07 08:06:33 +01:00
Pablo Galindo b250f89bb7
bpo-44305: Improve syntax error for try blocks without except or finally (GH-26523) 2021-06-03 23:52:12 +01:00
Victor Stinner f3fa63ec75
bpo-39573: Py_TYPE becomes a static inline function (GH-26493)
Convert the Py_TYPE() and Py_SIZE() macros to static inline
functions. The Py_SET_TYPE() and Py_SET_SIZE() functions must now be
used to set an object type and size.
2021-06-03 18:42:59 +02:00
Wm. Keith van der Meulen 4846ea95d1
Add bpo-42914 to What's New (GH-25124)
BPO-42914 was not added to the What's New in #24864. This includes it in the "Improved Modules" section.

Automerge-Triggered-By: GH:gpshead
2021-06-02 20:45:34 -07:00
Victor Stinner ee7637596d
bpo-44263: Py_TPFLAGS_HAVE_GC requires tp_traverse (GH-26463)
The PyType_Ready() function now raises an error if a type is defined
with the Py_TPFLAGS_HAVE_GC flag set but has no traverse function
(PyTypeObject.tp_traverse).
2021-06-01 23:37:12 +02:00
Jason R. Coombs 78d9a9b190
bpo-44246: Remove note about access by index now that a compatibility shim is offered. (GH-26472) 2021-05-31 12:29:24 -04:00
Dong-hee Na 14ba761078
bpo-44235: Remove deprecated functions in the gettext module. (GH-26378) 2021-05-30 10:29:45 +09:00
Jason R. Coombs 28f12c9f4f
bpo-44246: Update What's New for importlib.metadata. (#26408)
* bpo-44246: Update What's New for importlib.metadata.

Bump version of importlib_metadata included.
Add note about compatibility notice and fix link to entry_points documentation.
Add note about removal of access by index on Distribution.entry_points.

* Fix syntax mistake in issue reference.

Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>

* Fix broken reference in entry-points.

Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
2021-05-27 19:36:06 -04:00
Ken Jin d8fd8c8568
bpo-42392: [docs] Add deprecated-removed loop labels for asyncio (GH-26357)
* Add deprecated-removed loop labels for all reelvant functions/classes in asyncio
2021-05-26 14:59:34 -07:00
Petr Viktorin d16856960e
bpo-43795: Remove Py_FrozenMain from the Limited API & Stable ABI (GH-26241)
Py_FrozenMain was added to the Limited C API in [bpo-42591]() (3.10.0a4);
but to fix that issue it would be enough to add it to the regular C API.

The function is undocumented, tests were added very recently ([bpo-44131]()),
and most importantly, it is not present in all builds of Python, as
the linker sometimes omits it as unused.
It should be added back when these issues are fixed.

Note that this does not affect Python's regular C API.
2021-05-25 04:42:03 -07:00
Ken Jin 8450e8a81f
bpo-38908: [docs] Add changes to 3.10 whatsnew and fix some minor inaccuracies in news (GH-26096)
The fix only applies to ``isinstance``. ``issubclass`` isn't affected (because it was always working to begin with). So I also fixed the news to reflect that.
2021-05-24 16:51:08 -07:00
Tushar Sadhwani 3ad101b317
Fix typo in whatsnew/3.10.rst (GH-26310) 2021-05-23 23:10:24 +01:00
Mariusz Felisiak b06ed1d883
Remove duplicate words in docs. (GH-26167) 2021-05-21 23:39:09 +05:30
Ken Jin 5c6619552d
bpo-26110: Document `CALL_METHOD_KW` (GH-26159)
Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
2021-05-19 19:32:06 +01:00
Tal Einat 60d343a816
bpo-44010: IDLE: colorize pattern-matching soft keywords (GH-25851) 2021-05-19 12:18:10 +03:00
Pablo Galindo c5b833046d
bpo-44139: Use a more descriptive syntax error comprehension case in the What's New for 3.10 (GH-26145) 2021-05-15 17:37:12 +01:00
Ken Jin 53c91ac525
bpo-43977: Update pattern matching language reference docs (GH-25917)
* Update patma language reference with new changes to sequence and mapping

* update 3.10 whatsnew too
2021-05-13 22:31:28 -07:00
Erlend Egeberg Aasland a09fc9c63f
bpo-43908: Add What's New entry for Py_TPFLAGS_IMMUTABLETYPE flag (GH-25816) 2021-05-13 15:44:55 -07:00
Barney Gale 366c69f3f6
bpo-39906: Document new follow_symlinks argument to pathlib.Path.stat() and chmod() in 3.10 whatsnew. (GH-26089) 2021-05-13 13:17:04 +01:00
Barney Gale d1560d2429
bpo-43757: Document os.path.realpath(strict=True) in 3.10 whatsnew. (GH-26090) 2021-05-13 13:14:45 +01:00
Victor Stinner 6cd0446ef7
bpo-44113: Deprecate old functions to config Python init (GH-26060)
Deprecate the following functions to configure the Python
initialization:

* PySys_AddWarnOption()
* PySys_AddWarnOptionUnicode()
* PySys_AddXOption()
* PySys_HasWarnOptions()
* Py_SetPath()
* Py_SetProgramName()
* Py_SetPythonHome()
* Py_SetStandardStreamEncoding()
* _Py_SetProgramFullPath()

Use the new PyConfig API of the Python Initialization Configuration
instead (PEP 587).
2021-05-12 23:59:25 +02:00
Victor Stinner ff230153fd
bpo-44117: Add C API section to What's New in Python 3.11 (GH-26071)
Add also references to PyFrame_BlockPop() removal.
2021-05-12 18:46:29 +02:00
Mark Shannon 78b2abca8e
bpo-40222: Mention zero-cost exceptions in whats-new for 3.11 (GH-26021) 2021-05-12 11:31:48 +01:00
Thomas Grainger c1df8808e0
Correct the changelog entry for the syntax error message for multiple exception types (GH-26038) 2021-05-12 00:22:50 +01:00
Serhiy Storchaka a0bd9e9c11
bpo-28307: Convert simple C-style formatting with literal format into f-string. (GH-5012)
C-style formatting with literal format containing only format codes
%s, %r and %a (with optional width, precision and alignment)
will be converted to an equivalent f-string expression.

It can speed up formatting more than 2 times by eliminating
runtime parsing of the format string and creating temporary tuple.
2021-05-08 22:33:10 +03:00
Pablo Galindo 6692dc1ca9
bpo-43149: Correct the syntax error message for multiple exception types (GH-25996)
Automerge-Triggered-By: GH:pablogsal
2021-05-08 11:24:41 -07:00
Batuhan Taskaya 17229ab4a2
bpo-42725: mention the changes on what's new (GH-25974) 2021-05-08 14:49:40 +03:00
Ned Deily 42fcad26a4
Fix the whatsnew/3.11.rst to link to the blurb-generated changelog. (GH-25979) 2021-05-07 23:25:37 -04:00
Mark Shannon adcd220556
bpo-40222: "Zero cost" exception handling (GH-25729)
"Zero cost" exception handling.

* Uses a lookup table to determine how to handle exceptions.
* Removes SETUP_FINALLY and POP_TOP block instructions, eliminating (most of) the runtime overhead of try statements.
* Reduces the size of the frame object by about 60%.
2021-05-07 15:19:19 +01:00
Julien Palard a0cb2e4302
Doc: What's new in Python 3.11 (GH-25963) 2021-05-07 10:06:45 +02:00
Jelle Zijlstra f6d7abc6e7
Copyedits to 3.10 What's New (#25787)
Co-authored-by: Dominic Davis-Foster <dominic@davis-foster.co.uk>
2021-05-04 11:19:23 +02:00
Jelle Zijlstra 87109f4d85
bpo-44001: improve Literal documentation (GH-25877) 2021-05-04 10:54:12 +02:00
Tal Einat b43cc31a27
bpo-37903: IDLE: add shell sidebar mouse interactions (GH-25708)
Left click and drag to select lines.  With selection, right click for context menu with copy and copy-with-prompts.
Also add copy-with-prompts to the text-box context menu.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
2021-05-02 22:27:38 -04:00
Christian Heimes d8389e3e50
bpo-38820: Add ssl, hashlib, and hmac changes to whatsnew 3.10 (GH-25817)
Signed-off-by: Christian Heimes <christian@python.org>
2021-05-02 16:38:02 +02:00
Christian Heimes 60ce8f0be6
bpo-36384: Leading zeros in IPv4 addresses are no longer tolerated (GH-25099)
Reverts commit e653d4d8e8 and makes
parsing even more strict. Like socket.inet_pton() any leading zero
is now treated as invalid input.

Signed-off-by: Christian Heimes <christian@python.org>

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
2021-05-02 14:00:35 +02:00
larryhastings 49b26fa517
bpo-43987: Add "Annotations Best Practices" HOWTO doc. (#25746)
Add "Annotations Best Practices" HOWTO doc.
2021-05-01 21:19:24 -07:00
Christian Heimes e983252b51
bpo-43998: Default to TLS 1.2 and increase cipher suite security (GH-25778)
The ssl module now has more secure default settings. Ciphers without forward
secrecy or SHA-1 MAC are disabled by default. Security level 2 prohibits
weak RSA, DH, and ECC keys with less than 112 bits of security.
:class:`~ssl.SSLContext` defaults to minimum protocol version TLS 1.2.
Settings are based on Hynek Schlawack's research.

```
$ openssl version
OpenSSL 1.1.1k  FIPS 25 Mar 2021
$ openssl ciphers -v '@SECLEVEL=2:ECDH+AESGCM:ECDH+CHACHA20:ECDH+AES:DHE+AES:!aNULL:!eNULL:!aDSS:!SHA1:!AESCCM'
TLS_AES_256_GCM_SHA384  TLSv1.3 Kx=any      Au=any  Enc=AESGCM(256) Mac=AEAD
TLS_CHACHA20_POLY1305_SHA256 TLSv1.3 Kx=any      Au=any  Enc=CHACHA20/POLY1305(256) Mac=AEAD
TLS_AES_128_GCM_SHA256  TLSv1.3 Kx=any      Au=any  Enc=AESGCM(128) Mac=AEAD
TLS_AES_128_CCM_SHA256  TLSv1.3 Kx=any      Au=any  Enc=AESCCM(128) Mac=AEAD
ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256) Mac=AEAD
ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=RSA  Enc=AESGCM(256) Mac=AEAD
ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128) Mac=AEAD
ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=RSA  Enc=AESGCM(128) Mac=AEAD
ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
ECDHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=RSA  Enc=CHACHA20/POLY1305(256) Mac=AEAD
ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(256)  Mac=SHA384
ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH     Au=RSA  Enc=AES(256)  Mac=SHA384
ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(128)  Mac=SHA256
ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH     Au=RSA  Enc=AES(128)  Mac=SHA256
DHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=DH       Au=RSA  Enc=AESGCM(256) Mac=AEAD
DHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=DH       Au=RSA  Enc=AESGCM(128) Mac=AEAD
DHE-RSA-AES256-SHA256   TLSv1.2 Kx=DH       Au=RSA  Enc=AES(256)  Mac=SHA256
DHE-RSA-AES128-SHA256   TLSv1.2 Kx=DH       Au=RSA  Enc=AES(128)  Mac=SHA256
```

Signed-off-by: Christian Heimes <christian@python.org>
2021-05-01 20:53:10 +02:00
larryhastings 99f71aea5c
Noted my recent contributions in "What's New In Python 3.10". (#25771)
Noted my recent contributions in "What's New In Python 3.10".  Also made some edits clarifying "annotations" vs "type hints", and some other edits for correctness.
2021-04-30 22:55:21 -07:00
Yurii Karabas c24199184b
bpo-42269: Add slots parameter to dataclass decorator (GH-24171)
Add slots parameter to dataclass decorator and make_dataclass function.
2021-04-30 22:14:30 -04:00
Victor Stinner 3bb09947ec
bpo-43916: Add Py_TPFLAGS_DISALLOW_INSTANTIATION type flag (GH-25721)
Add a new Py_TPFLAGS_DISALLOW_INSTANTIATION type flag to disallow
creating type instances: set tp_new to NULL and don't create the
"__new__" key in the type dictionary.

The flag is set automatically on static types if tp_base is NULL or
&PyBaseObject_Type and tp_new is NULL.

Use the flag on the following types:

* _curses.ncurses_version type
* _curses_panel.panel
* _tkinter.Tcl_Obj
* _tkinter.tkapp
* _tkinter.tktimertoken
* _xxsubinterpretersmodule.ChannelID
* sys.flags type
* sys.getwindowsversion() type
* sys.version_info type

Update MyStr example in the C API documentation to use
Py_TPFLAGS_DISALLOW_INSTANTIATION.

Add _PyStructSequence_InitType() function to create a structseq type
with the Py_TPFLAGS_DISALLOW_INSTANTIATION flag set.

type_new() calls _PyType_CheckConsistency() at exit.
2021-04-30 12:46:15 +02:00
Victor Stinner abfd6388cd
bpo-43774: Enhance debug build documentation (GH-25712)
* Add also references to --with-trace-refs option.
* Move _ob_next and _ob_prev at the end, since they don't exist by
  default and are related to debug.
2021-04-29 13:06:59 +02:00
Victor Stinner 5bd0619533
bpo-43908: Document Static Types in the C API (GH-25710)
Update also PyTypeObject structure definition in the doc.
2021-04-29 10:26:34 +02:00
Inada Naoki e52ab42ced
bpo-41139: Deprecate `cgi.log()` (GH-25625) 2021-04-29 11:36:04 +09:00
scoder 3cc481b9de
bpo-28254: Add a C-API for controlling the GC state (GH-25687)
Add new C-API functions to control the state of the garbage collector:
PyGC_Enable(), PyGC_Disable(), PyGC_IsEnabled(),
corresponding to the functions in the gc module.

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
Co-authored-by: Victor Stinner <vstinner@python.org>
2021-04-28 18:12:16 +02:00
Ma Lin f9bedb630e
bpo-41486: Faster bz2/lzma/zlib via new output buffering (GH-21740)
Faster bz2/lzma/zlib via new output buffering.
Also adds .readall() function to _compression.DecompressReader class
to take best advantage of this in the consume-all-output at once scenario.

Often a 5-20% speedup in common scenarios due to less data copying.

Contributed by Ma Lin.
2021-04-27 23:58:54 -07:00
Ken Jin 05ab4b60ab
bpo-43766: Implement PEP 647 (User-Defined Type Guards) in typing.py (#25282) 2021-04-27 07:31:04 -07:00
Erlend Egeberg Aasland 7244c0060d
bpo-43762: Add audit events for loading of sqlite3 extensions (GH-25246) 2021-04-27 00:16:46 +01:00
Tymoteusz Wołodźko 09aa6f914d
bpo-38490: statistics: Add covariance, Pearson's correlation, and simple linear regression (#16813)
Co-authored-by: Tymoteusz Wołodźko <twolodzko+gitkraken@gmail.com
2021-04-25 14:45:09 +03:00
Serhiy Storchaka 172c0f2752
bpo-39529: Deprecate creating new event loop in asyncio.get_event_loop() (GH-23554)
asyncio.get_event_loop() emits now a deprecation warning when it creates a new event loop.
In future releases it will became an alias of asyncio.get_running_loop().
2021-04-25 13:40:44 +03:00
Batuhan Taskaya 8cc3cfa8af
bpo-42737: annotations with complex targets no longer causes any runtime effects (GH-23952) 2021-04-25 05:31:20 +03:00
Zackery Spytz b2fac1afaa
bpo-31870: Add a timeout parameter to ssl.get_server_certificate() (GH-22270) 2021-04-23 21:46:01 -07:00
Barney Gale f24e2e5464
bpo-39950: add `pathlib.Path.hardlink_to()` method that supersedes `link_to()` (GH-18909)
The argument order of `link_to()` is reversed compared to what one may expect, so:

    a.link_to(b)

Might be expected to create *a* as a link to *b*, in fact it creates *b* as a link to *a*, making it function more like a "link from". This doesn't match `symlink_to()` nor the documentation and doesn't seem to be the original author's intent.

This PR deprecates `link_to()` and introduces `hardlink_to()`, which has the same argument order as `symlink_to()`.
2021-04-23 13:48:52 -07:00
Pablo Galindo a77aac4fca
bpo-43914: Highlight invalid ranges in SyntaxErrors (#25525)
To improve the user experience understanding what part of the error messages associated with SyntaxErrors is wrong, we can highlight the whole error range and not only place the caret at the first character. In this way:

>>> foo(x, z for z in range(10), t, w)
  File "<stdin>", line 1
    foo(x, z for z in range(10), t, w)
           ^
SyntaxError: Generator expression must be parenthesized

becomes

>>> foo(x, z for z in range(10), t, w)
  File "<stdin>", line 1
    foo(x, z for z in range(10), t, w)
           ^^^^^^^^^^^^^^^^^^^^
SyntaxError: Generator expression must be parenthesized
2021-04-23 14:27:05 +01:00
Petr Viktorin 91b69b77cf
bpo-43868: Remove PyOS_ReadlineFunctionPointer from the stable ABI list (GH-25442)
The inclusion of PyOS_ReadlineFunctionPointer in python3dll.c was a mistake.

According to PEP 384:
> functions expecting FILE* are not part of the ABI, to avoid depending
> on a specific version of the Microsoft C runtime DLL on Windows.

https://bugs.python.org/issue43868
2021-04-23 14:23:38 +02:00
Hai Shi 32980fb669
bpo-37751: Document codecs.lookup() change in What's New in Python 3.9 (GH-23096) 2021-04-23 11:10:43 +02:00
Saiyang Gou 660592f67c
bpo-28724: Doc: Move socket.send_fds and socket.recv_fds docs to right section (GH-22608) 2021-04-22 13:08:46 +09:00
Batuhan Taskaya 81fe01492c
doc: Sync some missing 3.10 changes with the What's New (GH-25503)
Automerge-Triggered-By: GH:isidentical
2021-04-21 13:44:27 -07:00
JunWei Song 18e0d32804
Fix typo in whatsnew/3.10.rst (GH-25498) 2021-04-21 18:34:05 +01:00
Pablo Galindo 56c95dfe27
bpo-43859: Improve the error message for IndentationError exceptions (GH-25431) 2021-04-21 15:28:21 +01:00
Pablo Galindo b0544ba77c
bpo-38605: Revert making 'from __future__ import annotations' the default (GH-25490)
This reverts commits 044a1048ca and 1be456ae9d, adapting the code to changes that happened after it.
2021-04-21 12:41:19 +01:00
Pablo Galindo 8bf274a500
Small changes to the section about SyntaxErrors in the 3.10 What's New document (GH-25461) 2021-04-17 22:41:46 +01:00
Christian Heimes 39258d3595
bpo-43669: PEP 644: Require OpenSSL 1.1.1 or newer (GH-23014)
- Remove HAVE_X509_VERIFY_PARAM_SET1_HOST check
- Update hashopenssl to require OpenSSL 1.1.1
- multissltests only OpenSSL > 1.1.0
- ALPN is always supported
- SNI is always supported
- Remove deprecated NPN code. Python wrappers are no-op.
- ECDH is always supported
- Remove OPENSSL_VERSION_1_1 macro
- Remove locking callbacks
- Drop PY_OPENSSL_1_1_API macro
- Drop HAVE_SSL_CTX_CLEAR_OPTIONS macro
- SSL_CTRL_GET_MAX_PROTO_VERSION is always defined now
- security level is always available now
- get_num_tickets is available with TLS 1.3
- X509_V_ERR MISMATCH is always available now
- Always set SSL_MODE_RELEASE_BUFFERS
- X509_V_FLAG_TRUSTED_FIRST is always available
- get_ciphers is always supported
- SSL_CTX_set_keylog_callback is always available
- Update Modules/Setup with static link example
- Mention PEP in whatsnew
- Drop 1.0.2 and 1.1.0 from GHA tests
2021-04-17 11:36:35 +02:00
Pablo Galindo ff3d9c0f1a
Improve the section with SyntaxError message improvements to the What's New of 3.10 (GH-25428) 2021-04-16 01:28:48 +01:00
Zackery Spytz 0c4c436325
Fix typo in 3.10's What's New documentation (GH-25409)
"occured" ->  "occurred"
2021-04-14 09:16:11 -07:00
Pablo Galindo 5bf8bf2267
bpo-38530: Offer suggestions on NameError (GH-25397)
When printing NameError raised by the interpreter, PyErr_Display
will offer suggestions of simmilar variable names in the function that the exception
was raised from:

    >>> schwarzschild_black_hole = None
    >>> schwarschild_black_hole
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    NameError: name 'schwarschild_black_hole' is not defined. Did you mean: schwarzschild_black_hole?
2021-04-14 15:10:33 +01:00
Pablo Galindo c4073a24f9
Fix typo in the What's New for 3.10 (GH-25396) 2021-04-14 14:16:47 +01:00
Inada Naoki 333d10cbb5
bpo-43712 : fileinput: Add encoding parameter (GH-25272) 2021-04-14 14:12:58 +09:00
Pablo Galindo 37494b441a
bpo-38530: Offer suggestions on AttributeError (#16856)
When printing AttributeError, PyErr_Display will offer suggestions of similar 
attribute names in the object that the exception was raised from:

>>> collections.namedtoplo
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'collections' has no attribute 'namedtoplo'. Did you mean: namedtuple?
2021-04-14 02:36:07 +01:00
Lewis Gaul 11159d2c9d
bpo-43080: pprint for dataclass instances (GH-24389)
* Added pprint support for dataclass instances which don't have a custom __repr__.
2021-04-13 19:59:24 -04:00
Inada Naoki 695d47b51e
bpo-43785: Update bz2 document (GH-25351) 2021-04-14 08:22:49 +09:00
Victor Stinner 85918e4ab6
bpo-43774: Add more links to configure options (GH-25363) 2021-04-12 23:27:35 +02:00
Jelle Zijlstra 9825bdfbd5
bpo-43723: Deprecate camelCase aliases from threading (GH-25174)
The snake_case names have existed since Python 2.6, so there is
no reason to keep the old camelCase names around. One similar
method, threading.Thread.isAlive, was already removed in
Python 3.9 (bpo-37804).
2021-04-12 10:42:53 +02:00
Victor Stinner 553ee2781a
bpo-43682: Make staticmethod objects callable (GH-25117)
Static methods (@staticmethod) are now callable as regular functions.
2021-04-12 00:21:22 +02:00
Jelle Zijlstra 522433601a
bpo-43783: Add ParamSpecArgs/Kwargs (GH-25298) 2021-04-10 19:57:05 -07:00
Antti Haapala c3a478b7e5
Fix typo about line number in the 3.10 What's New document (GH-25328)
This was a typo copied from PEP 626.
2021-04-11 01:20:41 +01:00
Victor Stinner 09bbebea16
bpo-43753: Add Py_Is() and Py_IsNone() functions (GH-25227)
Add the Py_Is(x, y) function to test if the 'x' object is the 'y'
object, the same as "x is y" in Python. Add also the Py_IsNone(),
Py_IsTrue(), Py_IsFalse() functions to test if an object is,
respectively, the None singleton, the True singleton or the False
singleton.
2021-04-11 00:17:39 +02:00
Victor Stinner 507a574de3
bpo-43682: @staticmethod inherits attributes (GH-25268)
Static methods (@staticmethod) and class methods (@classmethod) now
inherit the method attributes (__module__, __name__, __qualname__,
__doc__, __annotations__) and have a new __wrapped__ attribute.

Changes:

* Add a repr() method to staticmethod and classmethod types.
* Add tests on the @classmethod decorator.
2021-04-09 17:51:22 +02:00
Victor Stinner a41782cc84
bpo-43774: Document configure options (GH-25283)
Add Doc/using/configure.rst documentation to document configure,
preprocessor, compiler and linker options.

Add a new section about the "Python debug build".
2021-04-08 22:32:21 +02:00
Saiyang Gou 0fdf11e8e9
bpo-43755: Update docs to reflect that lambda is not allowed in `comp_if` since 3.9 (GH-25231) 2021-04-06 23:15:37 +01:00
Brett Cannon 57c6cb5100
bpo-42135: Deprecate implementations of find_module() and find_loader() (GH-25169) 2021-04-06 08:56:57 -07:00
Dong-hee Na efccff9ac8
bpo-41870: Update What's News 3.10 about vectorcall (#25219)
* bpo-41870: Update What's News 3.10 about vectorcall

* update

* Update Doc/whatsnew/3.10.rst

Co-authored-by: Victor Stinner <vstinner@python.org>

Co-authored-by: Victor Stinner <vstinner@python.org>
2021-04-07 00:43:59 +09:00
Brett Cannon f97dc80068
bpo-43672: raise ImportWarning when calling find_loader() (GH-25119) 2021-04-02 12:35:32 -07:00
Zackery Spytz afd1265058
bpo-31956: Add start and stop parameters to array.index() (GH-25059)
Co-Authored-By: Anders Lorentsen <Phaqui@gmail.com>
2021-04-03 00:28:35 +09:00
Victor Stinner 3359cab038
bpo-43688: Support the limited C API in debug mode (GH-25131)
The limited C API is now supported if Python is built in debug mode
(if the Py_DEBUG macro is defined). In the limited C API, the
Py_INCREF() and Py_DECREF() functions are now implemented as opaque
function calls, rather than accessing directly the PyObject.ob_refcnt
member, if Python is built in debug mode and the Py_LIMITED_API macro
targets Python 3.10 or newer. It became possible to support the
limited C API in debug mode because the PyObject structure is the
same in release and debug mode since Python 3.8 (see bpo-36465).

The limited C API is still not supported in the --with-trace-refs
special build (Py_TRACE_REFS macro).
2021-04-02 15:45:37 +02:00
Don Kirkby 18701a0608
Fix typos in 3.10 "What's new" (GH-25104) 2021-04-01 15:00:30 +09:00
Ethan Furman b775106d94
bpo-40066: Enum: modify `repr()` and `str()` (GH-22392)
* Enum: streamline repr() and str(); improve docs

- repr() is now ``enum_class.member_name``
- stdlib global enums are ``module_name.member_name``
- str() is now ``member_name``
- add HOW-TO section for ``Enum``
- change main documentation to be an API reference
2021-03-30 21:17:26 -07:00
Brett Cannon a7ff6df60c
bpo-42134: Raise ImportWarning when calling find_module() in the import system (GH-25044) 2021-03-30 08:43:03 -07:00
Inada Naoki 4827483f47
bpo-43510: Implement PEP 597 opt-in EncodingWarning. (GH-19481)
See [PEP 597](https://www.python.org/dev/peps/pep-0597/).

* Add `-X warn_default_encoding` and `PYTHONWARNDEFAULTENCODING`.
* Add EncodingWarning
* Add io.text_encoding()
* open(), TextIOWrapper() emits EncodingWarning when encoding is omitted and warn_default_encoding is enabled.
* _pyio.TextIOWrapper() uses UTF-8 as fallback default encoding used when failed to import locale module. (used during building Python)
* bz2, configparser, gzip, lzma, pathlib, tempfile modules use io.text_encoding().
* What's new entry
2021-03-29 12:28:14 +09:00
Brett Cannon 1899087b21
bpo-42136: Deprecate module_repr() as found in importlib (GH-25022) 2021-03-26 11:55:07 -07:00
blopblopy 56816bb845
"exists" -> "exist" in What's New 3.10 (GH-25019) 2021-03-25 09:14:22 -07:00
Brett Cannon 9cb31d6716
bpo-42137: have ModuleType.__repr__ prefer __spec__ over module_repr() (GH-24953)
This is to work towards the removal of the use of  module_repr() in Python 3.12 (documented as deprecated since 3.4).
2021-03-24 08:26:56 -07:00
Victor Stinner 8370e07e1e
bpo-43244: Remove the pyarena.h header (GH-25007)
Remove the pyarena.h header file with functions:

* PyArena_New()
* PyArena_Free()
* PyArena_Malloc()
* PyArena_AddPyObject()

These functions were undocumented, excluded from the limited C API,
and were only used internally by the compiler.

Add pycore_pyarena.h header. Rename functions:

* PyArena_New() => _PyArena_New()
* PyArena_Free() => _PyArena_Free()
* PyArena_Malloc() => _PyArena_Malloc()
* PyArena_AddPyObject() => _PyArena_AddPyObject()
2021-03-24 02:23:01 +01:00
Victor Stinner 57364ce34e
bpo-43244: Remove parser_interface.h header file (GH-25001)
Remove parser functions using the "struct _mod" type, because the
AST C API was removed:

* PyParser_ASTFromFile()
* PyParser_ASTFromFileObject()
* PyParser_ASTFromFilename()
* PyParser_ASTFromString()
* PyParser_ASTFromStringObject()

These functions were undocumented and excluded from the limited C
API.

Add pycore_parser.h internal header file. Rename functions:

* PyParser_ASTFromFileObject() => _PyParser_ASTFromFile()
* PyParser_ASTFromStringObject() => _PyParser_ASTFromString()

These functions are no longer exported (replace PyAPI_FUNC() with
extern).

Remove also _PyPegen_run_parser_from_file() function. Update
test_peg_generator to use _PyPegen_run_parser_from_file_pointer()
instead.
2021-03-24 01:29:09 +01:00
Pablo Galindo a054f6b2b1
bpo-43452: Document the PyType_Lookup optimizations in the What's New for 3.10 (GH-24949) 2021-03-24 00:04:52 +00:00
Victor Stinner a81fca6ec8
bpo-43244: Add pycore_compile.h header file (GH-25000)
Remove the compiler functions using "struct _mod" type, because the
public AST C API was removed:

* PyAST_Compile()
* PyAST_CompileEx()
* PyAST_CompileObject()
* PyFuture_FromAST()
* PyFuture_FromASTObject()

These functions were undocumented and excluded from the limited C API.

Rename functions:

* PyAST_CompileObject() => _PyAST_Compile()
* PyFuture_FromASTObject() => _PyFuture_FromAST()

Moreover, _PyFuture_FromAST() is no longer exported (replace
PyAPI_FUNC() with extern). _PyAST_Compile() remains exported for
test_peg_generator.

Remove also compatibility functions:

* PyAST_Compile()
* PyAST_CompileEx()
* PyFuture_FromAST()
2021-03-24 00:51:50 +01:00
Joshua Bronson f0a6fde882
bpo-31861: Add aiter and anext to builtins (#23847)
Co-authored-by: jab <jab@users.noreply.github.com>
Co-authored-by: Daniel Pope <mauve@mauveweb.co.uk>
Co-authored-by: Justin Wang <justin39@gmail.com>
2021-03-23 15:47:21 -07:00
Victor Stinner 94faa0724f
bpo-43244: Remove ast.h, asdl.h, Python-ast.h headers (GH-24933)
These functions were undocumented and excluded from the limited C
API.

Most names defined by these header files were not prefixed by "Py"
and so could create names conflicts. For example, Python-ast.h
defined a "Yield" macro which was conflict with the "Yield" name used
by the Windows <winbase.h> header.

Use the Python ast module instead.

* Move Include/asdl.h to Include/internal/pycore_asdl.h.
* Move Include/Python-ast.h to Include/internal/pycore_ast.h.
* Remove ast.h header file.
* pycore_symtable.h no longer includes Python-ast.h.
2021-03-23 20:47:40 +01:00
Victor Stinner cd27af70d5
bpo-41718: Update runpy startup time What's New (GH-24998) 2021-03-23 20:22:40 +01:00
Rui Cunha b05b48dd7a
bpo-43571: Add IPPROTO_MPTCP macro (GH-24946)
Add IPPROTO_MPTCP constant when defined in the system headers.
2021-03-20 15:04:56 -07:00
Mark Shannon 148bc05844
Mention that code.co_lnotab is deprecated in what's new for 3.10. (#24902) 2021-03-19 17:30:24 +00:00
Victor Stinner 28ad12f8fe
bpo-43244: Remove symtable.h header file (GH-24910)
Rename Include/symtable.h to to Include/internal/pycore_symtable.h,
don't export symbols anymore (replace PyAPI_FUNC and PyAPI_DATA with
extern) and rename functions:

* PyST_GetScope() to _PyST_GetScope()
* PySymtable_BuildObject() to _PySymtable_Build()
* PySymtable_Free() to _PySymtable_Free()

Remove PySymtable_Build(), Py_SymtableString() and
Py_SymtableStringObject() functions.

The Py_SymtableString() function was part the stable ABI by mistake
but it could not be used, since the symtable.h header file was
excluded from the limited C API.

The Python symtable module remains available and is unchanged.
2021-03-19 12:41:49 +01:00
Christian Heimes 32eba61ea4
bpo-43466: Add --with-openssl-rpath configure option (GH-24820) 2021-03-19 10:29:25 +01:00
Victor Stinner eec8e61992
bpo-43244: Remove the PyAST_Validate() function (GH-24911)
Remove the PyAST_Validate() function. It is no longer possible to
build a AST object (mod_ty type) with the public C API. The function
was already excluded from the limited C API (PEP 384).

Rename PyAST_Validate() function to _PyAST_Validate(), move it to the
internal C API, and don't export it anymore (replace PyAPI_FUNC with
extern).

The function was added in bpo-12575 by
the commit 832bfe2ebd.
2021-03-18 14:57:49 +01:00
Mark Shannon 6086ae7fd4
Add PEP 626 to what's new in 3.10. (#24892) 2021-03-16 13:43:58 +00:00
Jason R. Coombs 35d5068928
bpo-43428: Improve documentation for importlib.metadata changes. (GH-24858)
* bpo-43428: Sync with importlib_metadata 3.7.3 (16ac3a95)

* Add 'versionadded' for importlib.metadata.packages_distributions

* Add section in what's new for Python 3.10 highlighting most salient changes and relevant backport.
2021-03-14 22:20:49 -04:00
Antoine Pitrou ba251c2ae6
bpo-43356: Allow passing a signal number to interrupt_main() (GH-24755)
Also introduce a new C API ``PyErr_SetInterruptEx(int signum)``.
2021-03-11 23:35:45 +01:00
Pablo Galindo b4f9089d4a
bpo-43439: Add audit hooks for gc functions (GH-24794) 2021-03-10 00:53:57 +00:00
Pablo Galindo 8747c1f233
Improve the description of the improvements in bpo-42202 (GH-24738) 2021-03-04 01:29:29 +00:00
Julien Palard b04f1cb9df
Doc: typo fix. (GH-24721) 2021-03-03 11:32:12 +01:00
Ken Jin 727a68b6e5
Reorder contents of 3.10's What's New (#24687) 2021-03-02 16:52:03 -08:00
Ned Deily a65b050516
bpo-42603: Add whatsnew and ACKS entries. (GH-24675) 2021-03-01 00:27:20 -05:00
Carol Willing 41934b399b
GH-42128: Add Pattern Matching to What's New (#24667)
* Add Pattern Matching to What's New

* add review suggestions

* fix stray indent

* Add suggestions from gvr and lr

* trim whitespace
2021-02-28 15:43:17 -08:00
Dennis Sweeney e8f5ddd33e
Add whatsnew note for GH-22904 (#24672) 2021-02-28 15:32:04 -06:00
Alex cc02b4f2e8
bpo-38302: __pow__/__rpow__ now called when __ipow__ returns NotImplemented (#16459) 2021-02-26 11:58:39 -08:00
Pablo Galindo d439fb304c
bpo-43277: Add PySet_CheckExact to the C-API (GH-24598)
For some mysterious reason we have PySet_Check, PyFrozenSet_Check, PyAnySet_Check, PyAnySet_CheckExact and PyFrozenSet_CheckExact but no PySet_CheckExact.
2021-02-20 18:03:08 +00:00
Victor Stinner 46496f9d12
bpo-42990: Functions inherit current builtins (GH-24564)
The types.FunctionType constructor now inherits the current builtins
if the globals dictionary has no "__builtins__" key, rather than
using {"None": None} as builtins: same behavior as eval() and exec()
functions.

Defining a function with "def function(...): ..." in Python is not
affected, globals cannot be overriden with this syntax: it also
inherits the current builtins.

PyFrame_New(), PyEval_EvalCode(), PyEval_EvalCodeEx(),
PyFunction_New() and PyFunction_NewWithQualName() now inherits the
current builtins namespace if the globals dictionary has no
"__builtins__" key.

* Add _PyEval_GetBuiltins() function.
* _PyEval_BuiltinsFromGlobals() now uses _PyEval_GetBuiltins() if
  builtins cannot be found in globals.
* Add tstate parameter to _PyEval_BuiltinsFromGlobals().
2021-02-20 15:17:18 +01:00
Nicholas Sim 4a6bf276ed
bpo-35134: Move non-limited C API files to Include/cpython/ (GH-24561)
Include/{odictobject.h,parser_interface.h,picklebufobject.h,pydebug.h,pyfpe.h}
into Include/cpython/.

Parser: peg_api: include Python.h instead of parser_interface.h.
2021-02-19 15:55:46 +01:00
Victor Stinner a3c3ffa68e
bpo-42990: Add __builtins__ attribute to functions (GH-24559)
Expose the new PyFunctionObject.func_builtins member in Python as a
new __builtins__ attribute on functions.

Document also the behavior change in What's New in Python 3.10.
2021-02-18 12:35:37 +01:00
Victor Stinner 801bb0b503
bpo-43103: Add configure --without-static-libpython (GH-24418)
Add a new configure --without-static-libpython option to not build
the libpythonMAJOR.MINOR.a static library and not install the
python.o object file.

Fix smelly.py and stable_abi.py tools when libpython3.10.a is
missing.
2021-02-17 11:14:42 +01:00
Ken Jin a2f0654b0a
bpo-42967: Fix urllib.parse docs and make logic clearer (GH-24536) 2021-02-15 09:00:20 -08:00
Adam Goldschmidt fcbe0cb04d
bpo-42967: only use '&' as a query string separator (#24297)
bpo-42967: [security] Address a web cache-poisoning issue reported in urllib.parse.parse_qsl().

urllib.parse will only us "&" as query string separator by default instead of both ";" and "&" as allowed in earlier versions. An optional argument seperator with default value "&" is added to specify the separator.


Co-authored-by: Éric Araujo <merwok@netwok.org>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
Co-authored-by: Éric Araujo <merwok@netwok.org>
2021-02-14 14:41:57 -08:00
Tom Forbes 749d40a53f
Fix link to sqlite3 enable_shared_cache documentation (GH-24496) 2021-02-10 19:56:16 +02:00
Ken Jin 5f77dee056
Improve docs of PEP 604 Union (#24301) 2021-02-08 17:57:11 -08:00
Dong-hee Na f917c243c5
bpo-43106: Add os.O_EVTONLY/O_FSYNC/O_SYMLINK/O_NOFOLLOW_ANY (GH-24428) 2021-02-04 08:32:55 +09:00
Aviral Srivastava 000cde5984
bpo-38307: Add end_lineno attribute to pyclbr Objects (GH-24348)
For back-compatibility, make the new constructor parameter for public classes Function and Class
keyword-only with a default of None.

Co-authored-by: Aviral Srivastava <aviralsrivastava@Avirals-MacBook-Air.local
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
2021-02-01 12:38:44 -05:00
Pablo Galindo a776da90b8
bpo-42927: Update the What's new entry for LOAD_ATTR optimizations (GH-24383) 2021-01-31 22:55:48 +00:00
Steve Dower 62949f697f
bpo-41282: Add deprecation warning and docs for distutils (PEP 632) (GH-24355) 2021-01-29 21:48:55 +00:00
Pablo Galindo 7c8e0b0336
Document new parenthesized with statements (GH-24281) 2021-01-25 23:15:51 +00:00
Victor Stinner 9852cb3811
bpo-42955: Rename module_names to sys.stdlib_module_names (GH-24332)
* Rename _Py_module_names to _Py_stdlib_module_names.
* Rename Python/module_names.h to Python/stdlib_module_names.h.
2021-01-25 23:12:50 +01:00
Serhiy Storchaka f066bd94b9
bpo-37319: Improve documentation, code and tests of randrange. (GH-19112) 2021-01-25 23:02:04 +02:00
Victor Stinner db584bdad3
bpo-42955: Add sys.modules_names (GH-24238)
Add sys.module_names, containing the list of the standard library
module names.
2021-01-25 13:24:42 +01:00
Pablo Galindo 805ede8ae8
Add a What's New entry for the new parser error improvements (GH-24280) 2021-01-21 17:36:35 +00:00
ravcio 6cd5b0117e
Fix typo in what's new. bidst_wheel -> bdist_wheel (GH-24234)
bidst_wheel -> bdist_wheel

Automerge-Triggered-By: GH:Mariatta
2021-01-21 02:23:46 -08:00
Ken Jin dcea78ff53
bpo-42392: Mention loop removal in whatsnew for 3.10 (GH-24256)
@vstinner [noticed on python-dev](https://mail.python.org/archives/list/python-dev@python.org/thread/O3T7SK3BGMFWMLCQXDODZJSBL42AUWTR/) that there is no what's new or porting entry for removal of asyncio ``loop`` parameter. 

This patch adds a basic guide.

Co-Authored-By: Kyle Stanley <aeros167@gmail.com>
2021-01-20 16:16:12 -08:00
Victor Stinner 75e59a97f5
bpo-42856: Add --with-wheel-pkg-dir=PATH configure option (GH-24210)
Add --with-wheel-pkg-dir=PATH option to the ./configure script. If
specified, the ensurepip module looks for setuptools and pip wheel
packages in this directory: if both are present, these wheel packages
are used instead of ensurepip bundled wheel packages.

Some Linux distribution packaging policies recommend against bundling
dependencies. For example, Fedora installs wheel packages in the
/usr/share/python-wheels/ directory and don't install the
ensurepip._bundled package.

ensurepip: Remove unused runpy import.
2021-01-20 17:07:21 +01:00
Zackery Spytz 14cfa325c2
bpo-39273: Expose BUTTON5_* constants in the curses module if available (GH-17996) 2021-01-14 11:40:09 +02:00
Hugo van Kemenade c47c78b878
bpo-37324: Remove ABC aliases from collections (GH-23754)
Remove deprecated aliases to Abstract Base Classes from the
collections module.
2021-01-13 00:16:37 +01:00
Tomáš Hrnčiar fb35fa49d1
bpo-42870: Document change in argparse help output. (GH-24190) 2021-01-11 16:41:35 -08:00
Victor Stinner 0e2a0f72cc
bpo-42802: Remove distutils bdist_wininst command (GH-24043)
The distutils bdist_wininst command deprecated in Python 3.8 has been
removed. The distutils bidst_wheel command is now recommended to
distribute binary packages on Windows.

* Remove Lib/distutils/command/bdist_wininst.py
* Remove PC/bdist_wininst/ project
* Remove Lib/distutils/command/wininst-*.exe programs
* Remove all references to bdist_wininst
2021-01-09 00:35:01 +01:00
Erlend Egeberg Aasland ddb5e11683
bpo-24464: Deprecate sqlite3.enable_shared_cache (GH-24008) 2021-01-06 02:36:04 +02:00
Erlend Egeberg Aasland cf0b23908c
bpo-40810: Require SQLite 3.7.15 (GH-24106) 2021-01-06 02:02:43 +02:00
Pablo Galindo 9e8fe1986c
bpo-42093: Tweak the what's new message about the new LOAD_ATTR opcode cache (GH-24070) 2021-01-03 04:37:46 +00:00
Ken Jin 11276cd9c4
bpo-41559: Documentation for PEP 612 (GH-24000) 2021-01-01 16:45:50 -08:00
Erlend Egeberg Aasland f4936ad1c4
bpo-42393: Raise OverflowError iso. DeprecationWarning on overflow in socket.ntohs and socket.htons (GH-23980) 2020-12-31 15:16:50 +02:00
pxinwr 277ce3060b
bpo-27640: Add --disable-test-modules configure option (GH-23886)
Added --disable-test-modules option to the configure script:
don't build nor install test modules.

Patch by Xavier de Gaye, Thomas Petazzoni and Peixing Xin.

Co-Authored-By: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Co-Authored-By: Xavier de Gaye <xdegaye@gmail.com>
2020-12-30 13:50:39 +01:00
Ken Jin f0853bcedf
Sync what's new in 3.9 with 3.9 branch (GH-23943) 2020-12-25 23:08:17 +00:00
Batuhan Taskaya eee1c7745a
bpo-41960: Add globalns and localns parameters to inspect.signature and Signature.from_callable (GH-22583) 2020-12-24 01:45:13 +03:00
kj d75f6f78e6
bpo-42675: Document collections.abc.Callable changes (GH-23839) 2020-12-18 09:39:26 -08:00
Victor Stinner 357704c9f2
bpo-42639: atexit now logs callbacks exceptions (GH-23771)
At Python exit, if a callback registered with atexit.register()
fails, its exception is now logged. Previously, only some exceptions
were logged, and the last exception was always silently ignored.

Add _PyAtExit_Call() function and remove
PyInterpreterState.atexit_func member. call_py_exitfuncs() now calls
directly _PyAtExit_Call().

The atexit module must now always be built as a built-in module.
2020-12-14 23:07:54 +01:00
Hai Shi 0f91f586ae
bpo-42599: Remove useless PyModule_GetWarningsModule() (GH-23691)
Removed PyModule_GetWarningsModule() which is useless due to 
the _warnings module was converted to a builtin module in 2.6.
2020-12-08 15:42:42 +01:00
Victor Stinner 0ef96c2b2a
bpo-30459: Cast the result of PyCell_SET to void (GH-23654) 2020-12-07 11:56:20 +01:00
Brett Cannon 2de5097ba4
bpo-26131: Deprecate usage of load_module() (GH-23469)
Raise an ImportWarning when the import system falls back on load_module(). As for implementations of load_module(), raise a DeprecationWarning.
2020-12-04 15:39:21 -08:00
Victor Stinner 1867b462de
bpo-37221: PyCode_New() didn't change in Python 3.8 (GH-23595) 2020-12-01 16:22:25 +01:00
Christian Heimes 5c73afc36e
bpo-28468: Add platform.freedesktop_os_release() (GH-23492)
Add platform.freedesktop_os_release() function to parse freedesktop.org
os-release files.

Signed-off-by: Christian Heimes <christian@python.org>
Co-authored-by: Victor Stinner <vstinner@python.org>
2020-11-30 22:34:45 +01:00
Dong-hee Na be319c0c10
bpo-42299: Remove formatter module (GH-23476) 2020-11-25 22:17:30 +09:00
Yurii Karabas 7301979b23
bpo-42202: Store func annotations as a tuple (GH-23316)
Reduce memory footprint and improve performance of loading modules having many func annotations.

  >>> sys.getsizeof({"a":"int","b":"int","return":"int"})
  232
  >>> sys.getsizeof(("a","int","b","int","return","int"))
  88

The tuple is converted into dict on the fly when `func.__annotations__` is accessed first.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Inada Naoki <songofacandy@gmail.com>
2020-11-25 19:43:18 +09:00
kj 8d17d2bd0a
Doc: Minor fixes (GH-23422) 2020-11-25 13:59:59 +09:00
Yaroslav Pankovych 79d2e62c00
Added support for negative indexes to PurePath.parents (GH-21799)
This commit also fixes up some of the overlapping documentation changed
in bpo-35498, which added support for indexing with slices.

Fixes bpo-21041.
https://bugs.python.org/issue21041

Co-authored-by: Paul Ganssle <p.ganssle@gmail.com>
Co-authored-by: Rémi Lapeyre <remi.lapeyre@henki.fr>
2020-11-23 15:06:22 -05:00
Serhiy Storchaka 686c203cd4
bpo-42423: Accept single base class in PyType_FromModuleAndSpec() (GH-23441) 2020-11-22 13:25:02 +02:00
Quentin Hibon aa3a3521ce
bpo-42419: Correct 'deprecatations' is What's New 3.9 (GH-23421) 2020-11-20 23:07:22 -05:00
Joshua Cannon 4520584483
bpo-35498: Added slice support to PathLib parents attribute. (GH-11165)
Added slice support to the `pathlib.Path.parents` sequence. For a `Path` `p`, slices of `p.parents` should return the same thing as slices of `tuple(p.parents)`.
2020-11-20 10:40:39 -05:00
Christian Heimes 03c8ddd9e9
bpo-42413: socket.timeout is now an alias of TimeoutError (GH-23413)
Signed-off-by: Christian Heimes <christian@python.org>
2020-11-20 00:26:07 -08:00
kj e1dc0db8c7
bpo-42345: Add whatsnew and versionchanged for typing.Literal in 3.9 (GH-23386)
* Whatsnew entry in 3.9 same as the one in 3.10.
* versionchanged for typing.Literal docs

Needs backport to 3.9.
2020-11-19 09:37:26 -08:00