Mailman 3 December 2021 - Python-Dev

Python release announcement format
by Yann Droneaud Dec. 19, 2021

Dec. 19, 2021

Hi, I'm not familiar with the Python release process, but looking at the latest release https://www.python.org/downloads/release/python-3101/ we can see MD5 is still used ... which doesn't sound right in 2021 ... especially since we proved it's possible to build different .tar.gz that have the same MD5 https://twitter.com/ydroneaud/status/1448659749604446211 https://twitter.com/angealbertini/status/1449736035110461443 You would reply there's OpenPGP / GnuPG signature. But then I would like to raise another issue regarding the release process: As the announcement on comp.lang.python.announce /python-announce-list(a)python.org doesn't record the release digest / release signature, the operator behind https://www.python.org/downloads/release/python-3101/ are free to change the release content at any time, provided there's a valid signature. And there will no way for us to check the release wasn't modified after the announcement. It would be great ifhttps://www.python.org/dev/peps/pep-0101/ would be improved from the naive: "Write the announcement for the mailing lists. This is the fuzzy bit because not much can be automated. You can use an earlier announcement as a template, but edit it for content!" to require the release announcement to record release archives digests as SHA-2 256 (added point if the announcement is signed), or the armored OpenPGP signatures (but's that a lot of base64 characters). Should I open a bug for this issue ? Regards. -- Yann Droneaud OPTEYA

5 6

Summary of Python tracker Issues
by Python tracker Dec. 17, 2021

Dec. 17, 2021

ACTIVITY SUMMARY (2021-12-10 - 2021-12-17) Python tracker at https://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue. Do NOT respond to this message. Issues counts and deltas: open 7180 (-15) closed 50665 (+93) total 57845 (+78) Open issues with patches: 2857 Issues opened (56) ================== #20741: Documentation archives should be available also in tar.xz form https://bugs.python.org/issue20741 reopened by iritkatriel #23522: Misleading note in Statistics module documentation https://bugs.python.org/issue23522 reopened by gvanrossum #29221: ABC Recursion Error on isinstance() with less than recursion l https://bugs.python.org/issue29221 reopened by serhiy.storchaka #43749: venv module does not copy the correct python exe https://bugs.python.org/issue43749 reopened by eryksun #44413: OverflowError: mktime argument out of range after 2019 https://bugs.python.org/issue44413 reopened by andrei.avk #46044: Update distutils documentation to say PyPI only accepts tar.g https://bugs.python.org/issue46044 opened by mbussonn #46045: NetBSD: do not use POSIX semaphores https://bugs.python.org/issue46045 opened by wiz #46050: [pathlib] Option so that OSError does not block glob in pathli https://bugs.python.org/issue46050 opened by matt32106 #46051: Make @atexit.register work for functions with arguments https://bugs.python.org/issue46051 opened by quapka #46052: IDLE: make Ctrl,Alt + IME non-ascii letter work on Windows https://bugs.python.org/issue46052 opened by anton.bryl #46053: NetBSD: ossaudio support incomplete https://bugs.python.org/issue46053 opened by wiz #46054: Incorrect error when parsing non-utf8 files https://bugs.python.org/issue46054 opened by pablogsal #46055: Speed up binary shifting operators https://bugs.python.org/issue46055 opened by xuxinhang #46061: Journal execution gives fatal error in Python 3.10.1 https://bugs.python.org/issue46061 opened by eaqrzn #46064: Permalinks to underscored documentation entries don't work. https://bugs.python.org/issue46064 opened by Fabian Dill #46065: re.findall takes forever and never ends https://bugs.python.org/issue46065 opened by ramzitra #46066: TypedDict alternative definition syntax with keyword args is c https://bugs.python.org/issue46066 opened by 97littleleaf11 #46067: SSLContext.set_npn_protocols broken in Python 3.10, tries to c https://bugs.python.org/issue46067 opened by diabonas #46068: Change use of warnings.warn to logging.warning in a few places https://bugs.python.org/issue46068 opened by andrei.avk #46070: _PyImport_FixupExtensionObject() regression causing a crash in https://bugs.python.org/issue46070 opened by graysky #46071: Graphlib documentation https://bugs.python.org/issue46071 opened by dam1784 #46072: Unify handling of stats in the CPython VM https://bugs.python.org/issue46072 opened by Mark.Shannon #46073: ast.unparse produces: 'FunctionDef' object has no attribute 'l https://bugs.python.org/issue46073 opened by TheRobotCarlson #46075: CookieJar.extract_cookies doesn't process cookies form local d https://bugs.python.org/issue46075 opened by keddad #46076: Document using __slots__ to provide per-attribute docstrings https://bugs.python.org/issue46076 opened by AlexWaygood #46077: Include sha256 hashes of release downloads in announcement com https://bugs.python.org/issue46077 opened by gregory.p.smith #46079: [doc] Broken URL in "Brief Tour of the Standard Library" https://bugs.python.org/issue46079 opened by vivekvashist #46080: argparse.BooleanOptionalAction with default=argparse.SUPPRESS https://bugs.python.org/issue46080 opened by felixfontein #46083: PyUnicode_FSConverter() has confusing reference semantics https://bugs.python.org/issue46083 opened by twouters #46084: Python 3.9.6 scan_dir returns filenotfound on long paths, but https://bugs.python.org/issue46084 opened by jschwar313 #46085: OrderedDict iterator allocates di_result unnecessarily https://bugs.python.org/issue46085 opened by Kevin Shweh #46086: Add ratio_min() function to the difflib library https://bugs.python.org/issue46086 opened by gibu #46088: Build hangs under Visual Studio in deepfreeze stage https://bugs.python.org/issue46088 opened by gvanrossum #46089: Problems with AF_PACKET sockets https://bugs.python.org/issue46089 opened by gallard #46090: C extensions can't swap out live frames anymore https://bugs.python.org/issue46090 opened by brandtbucher #46091: IndendationError from multi-line indented statements https://bugs.python.org/issue46091 opened by ucodery #46092: Fix/update missing parameters in function signatures for Built https://bugs.python.org/issue46092 opened by vivekvashist #46094: Missing unit test on unittest.TestResult to check for required https://bugs.python.org/issue46094 opened by DreamSh0t #46095: Warning about iterate/modify has unwarranted detail https://bugs.python.org/issue46095 opened by turepalsson #46096: Support PyObject interface for global variables in local scope https://bugs.python.org/issue46096 opened by dzhamoytsin #46097: Split function versions into 1-0xffff and 0x1000+ regions https://bugs.python.org/issue46097 opened by Mark.Shannon #46098: Missing test for multi-line errors in traceback https://bugs.python.org/issue46098 opened by iritkatriel #46099: Solaris: Fix pthread_getcpuclockid test https://bugs.python.org/issue46099 opened by kulikjak #46100: Simplify readline / editline detection https://bugs.python.org/issue46100 opened by christian.heimes #46101: argparse: using parents & subcommands, options can be ignored https://bugs.python.org/issue46101 opened by Lucas Cimon #46103: inspect.getmembers will call the instance __bases__ attribute, https://bugs.python.org/issue46103 opened by hongweipeng #46104: Reduce use of old-style syntax in typing docs https://bugs.python.org/issue46104 opened by AlexWaygood #46106: OpenSSL 1.1.1m is now available https://bugs.python.org/issue46106 opened by ned.deily #46107: ExceptionGroup.split()/subgroup() don't copy __note__ to parts https://bugs.python.org/issue46107 opened by iritkatriel #46108: Enum repr() incorrect when mixed with non-__new__ data types https://bugs.python.org/issue46108 opened by ethan.furman #46109: Separate resources and abc docs from other importlib docs https://bugs.python.org/issue46109 opened by jaraco #46110: `eval("-"*3000000 + "4")` in cmd causes hard crash https://bugs.python.org/issue46110 opened by charles.mcmarrow.4 #46113: Typos and minor fixes in built in types documentation https://bugs.python.org/issue46113 opened by vivekvashist #46114: OpenSSL 3.0 uses different version scheme https://bugs.python.org/issue46114 opened by penguinolog #46115: Interrupting subprocess.popen in recursive calls by KeyboardIn https://bugs.python.org/issue46115 opened by xxm #46117: tk could not refresh auto in mac os https://bugs.python.org/issue46117 opened by asper Most recent 15 issues with no replies (15) ========================================== #46115: Interrupting subprocess.popen in recursive calls by KeyboardIn https://bugs.python.org/issue46115 #46106: OpenSSL 1.1.1m is now available https://bugs.python.org/issue46106 #46104: Reduce use of old-style syntax in typing docs https://bugs.python.org/issue46104 #46103: inspect.getmembers will call the instance __bases__ attribute, https://bugs.python.org/issue46103 #46099: Solaris: Fix pthread_getcpuclockid test https://bugs.python.org/issue46099 #46098: Missing test for multi-line errors in traceback https://bugs.python.org/issue46098 #46096: Support PyObject interface for global variables in local scope https://bugs.python.org/issue46096 #46095: Warning about iterate/modify has unwarranted detail https://bugs.python.org/issue46095 #46083: PyUnicode_FSConverter() has confusing reference semantics https://bugs.python.org/issue46083 #46077: Include sha256 hashes of release downloads in announcement com https://bugs.python.org/issue46077 #46076: Document using __slots__ to provide per-attribute docstrings https://bugs.python.org/issue46076 #46075: CookieJar.extract_cookies doesn't process cookies form local d https://bugs.python.org/issue46075 #46071: Graphlib documentation https://bugs.python.org/issue46071 #46067: SSLContext.set_npn_protocols broken in Python 3.10, tries to c https://bugs.python.org/issue46067 #46053: NetBSD: ossaudio support incomplete https://bugs.python.org/issue46053 Most recent 15 issues waiting for review (15) ============================================= #46114: OpenSSL 3.0 uses different version scheme https://bugs.python.org/issue46114 #46113: Typos and minor fixes in built in types documentation https://bugs.python.org/issue46113 #46109: Separate resources and abc docs from other importlib docs https://bugs.python.org/issue46109 #46107: ExceptionGroup.split()/subgroup() don't copy __note__ to parts https://bugs.python.org/issue46107 #46104: Reduce use of old-style syntax in typing docs https://bugs.python.org/issue46104 #46103: inspect.getmembers will call the instance __bases__ attribute, https://bugs.python.org/issue46103 #46101: argparse: using parents & subcommands, options can be ignored https://bugs.python.org/issue46101 #46099: Solaris: Fix pthread_getcpuclockid test https://bugs.python.org/issue46099 #46096: Support PyObject interface for global variables in local scope https://bugs.python.org/issue46096 #46094: Missing unit test on unittest.TestResult to check for required https://bugs.python.org/issue46094 #46092: Fix/update missing parameters in function signatures for Built https://bugs.python.org/issue46092 #46091: IndendationError from multi-line indented statements https://bugs.python.org/issue46091 #46088: Build hangs under Visual Studio in deepfreeze stage https://bugs.python.org/issue46088 #46086: Add ratio_min() function to the difflib library https://bugs.python.org/issue46086 #46080: argparse.BooleanOptionalAction with default=argparse.SUPPRESS https://bugs.python.org/issue46080 Top 10 most discussed issues (10) ================================= #46028: 3.11.0a3: under tox, sys._base_executable is wrong https://bugs.python.org/issue46028 21 msgs #46052: IDLE: make Ctrl,Alt + IME non-ascii letter work on Windows https://bugs.python.org/issue46052 12 msgs #46084: Python 3.9.6 scan_dir returns filenotfound on long paths, but https://bugs.python.org/issue46084 12 msgs #46006: [subinterpreter] _PyUnicode_EqualToASCIIId() issue with subint https://bugs.python.org/issue46006 9 msgs #46070: _PyImport_FixupExtensionObject() regression causing a crash in https://bugs.python.org/issue46070 9 msgs #44413: OverflowError: mktime argument out of range after 2019 https://bugs.python.org/issue44413 8 msgs #45383: PyType_FromSpec API fails to use metaclass of bases https://bugs.python.org/issue45383 8 msgs #22815: unexpected successes are not output https://bugs.python.org/issue22815 7 msgs #40059: Provide a toml module in the standard library https://bugs.python.org/issue40059 6 msgs #45292: Implement PEP 654: Exception Groups https://bugs.python.org/issue45292 6 msgs Issues closed (75) ================== #4733: Add a "decode to declared encoding" version of urlopen to urll https://bugs.python.org/issue4733 closed by ajaksu2 #9504: signal.signal/signal.alarm not working as expected https://bugs.python.org/issue9504 closed by iritkatriel #13236: unittest needs more flush calls https://bugs.python.org/issue13236 closed by lukasz.langa #16392: [doc] import crashes on circular imports in ext modules https://bugs.python.org/issue16392 closed by scoder #16594: SocketServer should set SO_REUSEPORT along with SO_REUSEADDR w https://bugs.python.org/issue16594 closed by asvetlov #17763: test_pydoc fails with the installed testsuite https://bugs.python.org/issue17763 closed by iritkatriel #18467: argparse - problematic 'default' behavior https://bugs.python.org/issue18467 closed by iritkatriel #19737: Documentation of globals() and locals() should be improved https://bugs.python.org/issue19737 closed by lukasz.langa #19838: test.test_pathlib.PosixPathTest.test_touch_common fails on Fre https://bugs.python.org/issue19838 closed by iritkatriel #21390: readline: setlocale() returns NULL on Android https://bugs.python.org/issue21390 closed by vstinner #21461: Recognize -pthread https://bugs.python.org/issue21461 closed by wiz #21964: inconsistency in list-generator comprehension with yield(-from https://bugs.python.org/issue21964 closed by iritkatriel #23010: "unclosed file" warning when defining unused logging FileHandl https://bugs.python.org/issue23010 closed by vinay.sajip #23148: Missing the charset parameter in as_encoded_word() https://bugs.python.org/issue23148 closed by serhiy.storchaka #23948: Deprecate os.kill() on Windows https://bugs.python.org/issue23948 closed by eryksun #24010: Add error checks to PyInit__locale() https://bugs.python.org/issue24010 closed by iritkatriel #24012: Add error checks to PyInit_pyexpat() https://bugs.python.org/issue24012 closed by iritkatriel #24116: --with-pydebug has no effect when the final python binary is c https://bugs.python.org/issue24116 closed by iritkatriel #25834: getpass falls back when sys.stdin is changed https://bugs.python.org/issue25834 closed by iritkatriel #25864: collections.abc.Mapping should include a __reversed__ that rai https://bugs.python.org/issue25864 closed by AlexWaygood #26216: run runtktests.py error when test tkinter https://bugs.python.org/issue26216 closed by iritkatriel #26726: Incomplete Internationalization in Argparse Module https://bugs.python.org/issue26726 closed by iritkatriel #26952: argparse help formatter raises IndexError https://bugs.python.org/issue26952 closed by iritkatriel #27062: `inspect` doesn't have `__all__` https://bugs.python.org/issue27062 closed by lukasz.langa #27258: Exception in BytesGenerator.flatten https://bugs.python.org/issue27258 closed by iritkatriel #27718: help('signal') incomplete (e.g: signal.signal not visible) https://bugs.python.org/issue27718 closed by serhiy.storchaka #30716: Failing tests with installed 3.6.2rc1 on Win 10-64 https://bugs.python.org/issue30716 closed by iritkatriel #36674: "unittest.TestCase.debug" should honour "skip" (and other test https://bugs.python.org/issue36674 closed by serhiy.storchaka #38584: argparse: Specifying a whitespace-only help message to a posit https://bugs.python.org/issue38584 closed by Lucas Cimon #38590: argparse unexpected behavior with argument group inside mutual https://bugs.python.org/issue38590 closed by iritkatriel #40927: ./python -m test test___all__ test_binhex fails https://bugs.python.org/issue40927 closed by iritkatriel #42114: Documentation of ctypes.CDLL does not correspond to code https://bugs.python.org/issue42114 closed by lukasz.langa #42962: Windows: SystemError during os.kill(..., signal.CTRL_C_EVENT) https://bugs.python.org/issue42962 closed by eryksun #43862: warnings: -W option and PYTHONWARNINGS now use the message as https://bugs.python.org/issue43862 closed by vstinner #44674: dataclasses should allow frozendict default value https://bugs.python.org/issue44674 closed by eric.smith #44893: importlib.metadata Entrypoint has a broken _asdict https://bugs.python.org/issue44893 closed by jaraco #44896: AttributeError in ast.unparse https://bugs.python.org/issue44896 closed by BTaskaya #45635: Tidy up error handling in traceback.c / python run.c https://bugs.python.org/issue45635 closed by iritkatriel #45643: Add signal.SIGSTKFLT constant (Linux) https://bugs.python.org/issue45643 closed by vstinner #45684: `functools.singledispatchmethod` does not define `__class_geti https://bugs.python.org/issue45684 closed by AlexWaygood #45690: Argparse exclusive group inside required exclusive group displ https://bugs.python.org/issue45690 closed by iritkatriel #45755: Specialized generic class does not return class attributes in https://bugs.python.org/issue45755 closed by kj #45840: Improve cross-references in the data model documentation https://bugs.python.org/issue45840 closed by serhiy.storchaka #45855: Replace PyImport_ImportModuleNoBlock with PyImport_ImportModul https://bugs.python.org/issue45855 closed by asvetlov #45919: Use WinAPI GetFileType() in is_valid_fd() https://bugs.python.org/issue45919 closed by corona10 #45949: Provide pure-Python implementation of Programs/_freeze_module https://bugs.python.org/issue45949 closed by christian.heimes #45977: Unexpected effect of sys.pycache_prefix = "" https://bugs.python.org/issue45977 closed by andrei.avk #46014: functools.singledispatch does not support Union types https://bugs.python.org/issue46014 closed by lukasz.langa #46040: asyncio.coroutine documented as removed in 3.10 https://bugs.python.org/issue46040 closed by asvetlov #46041: Add reference counting micro-optimizations to listobject.c https://bugs.python.org/issue46041 closed by rhettinger #46042: Error range of "duplicate argument" SyntaxErrors is too big https://bugs.python.org/issue46042 closed by pablogsal #46043: Python Launcher Not Opening Files. https://bugs.python.org/issue46043 closed by ned.deily #46046: I/O bound threads got to no chance to run with small CPU bound https://bugs.python.org/issue46046 closed by kj #46047: When using Py_NewInterpreter, some modules fail to import in P https://bugs.python.org/issue46047 closed by diabonas #46048: embeddable distro cannot import modules https://bugs.python.org/issue46048 closed by steve.dower #46049: ._pth files untested on Linux https://bugs.python.org/issue46049 closed by steve.dower #46056: Cannot use virtual environment on Windows 10 in corporate secu https://bugs.python.org/issue46056 closed by gregory.p.smith #46057: argparse: embedded groups may prevent options from being in he https://bugs.python.org/issue46057 closed by iritkatriel #46058: argparse: arg groups and mutually exclusive groups behave inco https://bugs.python.org/issue46058 closed by iritkatriel #46059: Typo in match Statement example https://bugs.python.org/issue46059 closed by kj #46060: Clarify asyncio.new_event_loop return value https://bugs.python.org/issue46060 closed by pbryan2 #46062: tkinter.filedialog.SaveAs: create new folder on Ubuntu? https://bugs.python.org/issue46062 closed by serhiy.storchaka #46063: TimedRotatingFileHandler deletes wrong files https://bugs.python.org/issue46063 closed by vinay.sajip #46069: Spam https://bugs.python.org/issue46069 closed by serhiy.storchaka #46074: deepfreeze should rehash all strings upon reset https://bugs.python.org/issue46074 closed by gvanrossum #46078: `ast.unparse` fails on `class C: i: int`�� convert broken fro https://bugs.python.org/issue46078 closed by samuelmarks #46081: Document the msg argument for assertRaises https://bugs.python.org/issue46081 closed by cool-RR #46082: type casting of bool https://bugs.python.org/issue46082 closed by AlexWaygood #46087: format library documentation error https://bugs.python.org/issue46087 closed by serhiy.storchaka #46093: 2D array issue https://bugs.python.org/issue46093 closed by eric.smith #46102: pdb can't convert dict_values to list https://bugs.python.org/issue46102 closed by christian.heimes #46105: Requirement syntax broken when extras indicated on url_req https://bugs.python.org/issue46105 closed by jaraco #46111: test_unittest fails in optimized mode https://bugs.python.org/issue46111 closed by serhiy.storchaka #46112: PEP 8 code format https://bugs.python.org/issue46112 closed by serhiy.storchaka #46116: _asyncio_backend.py datagram_received doesn't handle Future ca https://bugs.python.org/issue46116 closed by asvetlov

1 0

Static types and subinterpreters running in parallel
by Victor Stinner Dec. 17, 2021

Dec. 17, 2021

Hi, One option to solve the https://bugs.python.org/issue40601 "[C API] Hide static types from the limited C API" issue without breaking the backward compatibility is to leave the C API and the stable ABI as they are for the main interpreter (static types), but force subinterpreters running in parallel to use their own heap types. It means that subinterpreters would be able to use the main interpreter GIL or own their GIL. By default, the GIL would still be shared. C extensions using "&PyLongType" (static type) would continue to work in the main interpreter. C extensions which want to opt-in for running subinterpreters in parallel would not access to "&PyLong_Type" but be forced to call PyLong_GetType() (heap type). Internally, Python should be modified to replace "&PyLongType" with PyLong_GetType(). So the code would work with static types and heap types. It also means that a subinterpreter running in parallel would only be able to import C extensions built with explicit support for this feature. Otherwise, an ImportError would be raised. Victor -- Night gathers, and now my watch begins. It shall not end until my death.

4 3

subinterpreters and their possible impact on large extension projects
by Eric Snow Dec. 17, 2021

Dec. 17, 2021

One of the open questions relative to subinterpreters is: how to reduce the amount of work required for extension modules to support them? Thanks to Petr Viktorin for a lot of work he's done in this area (e.g. PEP 489)! Extensions also have the option to opt out of subinterpreter support. However, that's only one part of the story. A while back Nathaniel expressed concerns with how making subinterpreters more accessible will have a negative side effect affecting projects that publish large extensions, e.g. numpy. Not all extensions support subinterpreters due to global state (incl. in library dependencies). The amount of work to get there may be large. As subinterpreters increase in usage in the community, so will demand increase for subinterpreter support in those extensions. Consequently, such projects be pressured to do the extra work (which is made even more stressful by the short-handed nature of most open source projects) . So we (the core devs) would effectively be requiring those extensions to support subinterpreters, regardless of letting them opt out. This situation has been weighing heavily on my mind since Nathaniel brought this up. Here are some ideas I've had or heard of about what we could do to help: * add a page to the C-API documentation about how to support subinterpreters * identify the extensions most likely to be impacted and offer to help * add more helpers to the C-API to make adding subinterpreter support less painful * fall back to loading the extension in its own namespace (e.g. use ldm_open()) * fall back to copying the extension's file and loading from the copied file * ... I'd appreciate your thoughts on what we can do to help. Thanks! -eric

6 12

Re: [python-committers] Sad news from Zurich
by Ivan Van Laningham Dec. 14, 2021

Dec. 14, 2021

Fredrik was a lovely man who was also essential to the development of Python as it is today. I'm sorry that I only met him once, and I will miss him greatly. Metta, Ivan -- Ivan Van Laningham God N Locomotive Works https://legacy.python.org/workshops/1998-11/proceedings/papers/laningham/la… <http://www.python.org/workshops/1998-11/proceedings/papers/laningham/laning…> Army Signal Corps: Cu Chi, Class of '70 Author: Teach Yourself Python in 24 Hours

1 0

Should dataclasses add__set__ (and possibly __get __) descriptors ?
by Vioshim Dec. 14, 2021

Dec. 14, 2021

Hello good morning. I've decided to open a discussion of a topic that I consider should be part of dataclasses, but not sure how suggestions work and many threads recommend to check python dev first so-. Anyways, at the moment that I write this message in python3.10.1, It happens that when making a class with the dataclasses module, this class can't actually be used in Multiple inheritance for Enum purposes, this is mostly to avoid code repetition by having to write the methods over again. Here's an example from dataclasses import dataclass from enum import Enum @dataclass class Foo: a: int = 0 class Entries(Foo, Enum): ENTRY1 = Foo(1) ENTRY2 = Foo(2) ENTRY3 = Foo(3) assert Entries.ENTRY1.a == 1 This raises AssertionError, due to the values not being defined at that point, as the class is currently just using the default paremeters. This is why I think it'd be essential to implement __set__ in the module. Currently there's a workaround to have this work, which is defining a __set__ but doing this, in more complex cases, can get to be very tedious and repetitive coding wise from dataclasses import dataclass from enum import Enum @dataclass class Foo: a: int = 0 def __set__(self, instance, value: int): instance.a = value class Entries(Foo, Enum): ENTRY1 = Foo(1) ENTRY2 = Foo(2) ENTRY3 = Foo(3) assert Entries.ENTRY1.a == 1 Have a great day, and hopefully this post enables a good discussion.

6 6

Sad news from Zurich
by Guido van Rossum Dec. 12, 2021

Dec. 12, 2021

A former core dev who works at Google just passed the news that Fredrik Lundh (also known as Effbot) has died. Fredrik was an early Python contributor (e.g. Elementtree and the 're' module) and his enthusiasm for the language and community were inspiring for all who encountered him or his work. He spent countless hours on comp.lang.python answering questions from newbies and advanced users alike. He also co-founded an early Python startup, Secret Labs AB, which among other software released an IDE named PythonWorks. Fredrik also created the Python Imaging Library (PIL) which is still THE way to interact with images in Python, now most often through its Pillow fork. His effbot.org site was a valuable resource for generations of Python users, especially its Tkinter documentation. Fredrik's private Facebook page contains the following message from November 25 by Ylva Larensson (translated from Swedish): """ It is with such sorrow and pain that I write this. Fredrik has left us suddenly. """ A core dev wrote: "I felt privileged to be able to study Fredrik's code and to read his writing. He was a huge asset to our community in the early days. I enjoyed his sense of humor as well. I'm sad that he passed away." We will miss him. -- --Guido van Rossum (python.org/~guido) *Pronouns: he/him **(why is my pronoun here?)* <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-…>

5 4

Do we need to remove everything that's deprecated?
by Petr Viktorin Dec. 12, 2021

Dec. 12, 2021

We're rebuilding many popular projects with Python 3.11 alpha, and I see many failures like: AttributeError: module 'configparser' has no attribute 'SafeConfigParser'. Did you mean: 'RawConfigParser'? (bpo-45173) ImportError: cannot import name 'formatargspec' from 'inspect' (bpo-45320) AttributeError: '[...]Tests' object has no attribute 'failUnless' (bpo-45162) Are these changes necessary? Does it really cost us that much in maintainer effort to keep a well-tested backwards compatibility alias name, or a function that has a better alternative? I think that rather than helping our users, changes like these are making Python projects painful to maintain. If we remove them to make Python easier for us to develop, is it now actually that much easier to maitain? The current backwards compatibility policy (PEP 387) sets a *minimum* timeline for deprecations and removals -- "deprecation period must last at least two years." But it seems like it's not treated as a minimum: if any contributor sends an issue/PR to remove deprecated functionality, it's merged without much discussion. And it's very easy to "solve" these "issues", since everything is already marked for deletion; I fear we get the same kind of bikeshed/powerplant problem https://bikeshed.com/ for changes that explains for discussion. It's just so much easier to do "spring cleaning" than solve other problems. Note that I am criticizing the *process*; the examples I gave have some people's names attached, and I have no doubt the people acted with best intentions. I'm also not talking about code that's buggy, insecure, or genuinely hard to maintain. If deprecation now means "we've come up with a new way to do things, and you have two years to switch", can we have something else that means "there's now a better way to do things; the old way is a bit worse but continues to work as before"?

12 28

PEP 669: Low Impact Monitoring for CPython
by Mark Shannon Dec. 12, 2021

Dec. 12, 2021

Hi, I would like to announce latest PEP, PEP 669: Low Impact Monitoring for CPython. The aim of this PEP is to provide an API for profilers, debuggers and other tools to avoid the punitive overhead of using sys.settrace. If you have any interest in profilers, debuggers, coverage tools or anything of that ilk, then do please take a look. There is no change to the language and it adds 7 functions to the sys module, so shouldn't be too intrusive for those of who aren't planning on implementing any of those tools. As always, all feedback and comments are welcome. You can read the PEP here: https://python.github.io/peps/pep-0669/ Cheers, Mark.

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Summary of Python tracker Issues
by Python tracker Dec. 10, 2021

Dec. 10, 2021

ACTIVITY SUMMARY (2021-12-03 - 2021-12-10) Python tracker at https://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue. Do NOT respond to this message. Issues counts and deltas: open 7195 (-57) closed 50572 (+123) total 57767 (+66) Open issues with patches: 2859 Issues opened (44) ================== #23469: Delete Misc/*.wpr files https://bugs.python.org/issue23469 reopened by berker.peksag #28533: Remove asyncore, asynchat and smtpd modules https://bugs.python.org/issue28533 reopened by vstinner #31184: Fix data descriptor detection in inspect.getattr_static https://bugs.python.org/issue31184 reopened by davidhalter #45620: A misleading url in 'Floating Point Arithmetic' page https://bugs.python.org/issue45620 reopened by eric.smith #45798: Move _decimal build setup into configure https://bugs.python.org/issue45798 reopened by ned.deily #45975: Simplify some while-loops with walrus operator https://bugs.python.org/issue45975 opened by nickdrozd #45977: Unexpected effect of sys.pycache_prefix = "" https://bugs.python.org/issue45977 opened by andrei.avk #45978: deepfreeze opaquely fails on Windows when building from Visual https://bugs.python.org/issue45978 opened by Dennis Sweeney #45979: Fix Tkinter tests with old Tk https://bugs.python.org/issue45979 opened by serhiy.storchaka #45981: Get raw file name in bytes from ZipFile https://bugs.python.org/issue45981 opened by accelerator0099 #45985: AttributeError from @property inadvertantly flows into __getat https://bugs.python.org/issue45985 opened by koreno #45988: inspect.signature fails on a @staticmethod https://bugs.python.org/issue45988 opened by PhilipVinc #45990: Exception notes need more documentation https://bugs.python.org/issue45990 opened by cool-RR #45991: Improve ambiguous docstrings in pkgutil https://bugs.python.org/issue45991 opened by khock #45992: distutils paths are scattered between PythonXY and PythonXY-32 https://bugs.python.org/issue45992 opened by uranusjr #45994: Add simple usage to email module https://bugs.python.org/issue45994 opened by tarao1006 #45995: string formatting: normalize negative zero https://bugs.python.org/issue45995 opened by John Belmonte #45996: Worse error from asynccontextmanager in Python 3.10 https://bugs.python.org/issue45996 opened by Dima.Tisnek #45997: asyncio.Semaphore waiters deque doesn't work https://bugs.python.org/issue45997 opened by hyzyla #45998: Document best practice for including and linking python framew https://bugs.python.org/issue45998 opened by ronaldoussoren #46005: [doc] replace 'distutils' examples with 'setuptools' https://bugs.python.org/issue46005 opened by elmjag #46006: [subinterpreter] _PyUnicode_EqualToASCIIId() issue with subint https://bugs.python.org/issue46006 opened by vstinner #46010: Cookie cutter templates to allow variable fields and data tran https://bugs.python.org/issue46010 opened by Francisco #46011: Python 3.10 email returns invalid Date: header unchanged. https://bugs.python.org/issue46011 opened by msapiro #46013: Confusing period in object.__hash__ doc https://bugs.python.org/issue46013 opened by JMcB17 #46014: functools.singledispatch does not support Union types https://bugs.python.org/issue46014 opened by evansd #46017: Tutorial incorrectly refers to skits rather than sketches. https://bugs.python.org/issue46017 opened by k2k #46020: Optimize long_pow for the common case https://bugs.python.org/issue46020 opened by rhettinger #46021: fcntl module update supports FreeBSD F_KINFO flag https://bugs.python.org/issue46021 opened by devnexen #46022: Multiprocessing.Server.serve_forever runs sys.exit() https://bugs.python.org/issue46022 opened by bar.harel #46023: Modules/makesetup generated rules ignore *disabled* https://bugs.python.org/issue46023 opened by christian.heimes #46024: Different behaviour with zipfile https://bugs.python.org/issue46024 opened by flvn.dev #46026: importlib.resources.read_text() raises FileNotFound https://bugs.python.org/issue46026 opened by Zac Hatfield-Dodds #46027: email.utils.parsedate_to_datetime() handling of -0000 offset https://bugs.python.org/issue46027 opened by fdrake #46028: 3.11.0a3: under tox, sys._base_executable is wrong https://bugs.python.org/issue46028 opened by nedbat #46030: socket module add couple of FreeBSD constants https://bugs.python.org/issue46030 opened by dcarlier #46031: add POP_JUMP_IF_NOT_NONE and POP_JUMP_IF_NONE https://bugs.python.org/issue46031 opened by penguin_wwy #46032: functools' singledispatch does not support GenericAlias https://bugs.python.org/issue46032 opened by kumaraditya303 #46033: Duplicated sentence in for statement documentation https://bugs.python.org/issue46033 opened by michcio1234 #46035: mimetypes.guess_type returns deprecated mimetype application/x https://bugs.python.org/issue46035 opened by milahu #46036: Single-phase initialized modules gets initialized multiple tim https://bugs.python.org/issue46036 opened by daniel-falk #46037: logging.config.dictConfig with disable_existing_loggers set, a https://bugs.python.org/issue46037 opened by vladmihaisima #46038: Mark /configure file as generated in .gitattributes https://bugs.python.org/issue46038 opened by arhadthedev #46039: Break up the YIELD_FROM instruction. https://bugs.python.org/issue46039 opened by Mark.Shannon Most recent 15 issues with no replies (15) ========================================== #46039: Break up the YIELD_FROM instruction. https://bugs.python.org/issue46039 #46038: Mark /configure file as generated in .gitattributes https://bugs.python.org/issue46038 #46037: logging.config.dictConfig with disable_existing_loggers set, a https://bugs.python.org/issue46037 #46036: Single-phase initialized modules gets initialized multiple tim https://bugs.python.org/issue46036 #46031: add POP_JUMP_IF_NOT_NONE and POP_JUMP_IF_NONE https://bugs.python.org/issue46031 #46030: socket module add couple of FreeBSD constants https://bugs.python.org/issue46030 #46027: email.utils.parsedate_to_datetime() handling of -0000 offset https://bugs.python.org/issue46027 #46014: functools.singledispatch does not support Union types https://bugs.python.org/issue46014 #46010: Cookie cutter templates to allow variable fields and data tran https://bugs.python.org/issue46010 #46005: [doc] replace 'distutils' examples with 'setuptools' https://bugs.python.org/issue46005 #45998: Document best practice for including and linking python framew https://bugs.python.org/issue45998 #45991: Improve ambiguous docstrings in pkgutil https://bugs.python.org/issue45991 #45990: Exception notes need more documentation https://bugs.python.org/issue45990 #45985: AttributeError from @property inadvertantly flows into __getat https://bugs.python.org/issue45985 #45970: Py_NewInterpreter causes bogus fatal error along the failure p https://bugs.python.org/issue45970 Most recent 15 issues waiting for review (15) ============================================= #46039: Break up the YIELD_FROM instruction. https://bugs.python.org/issue46039 #46038: Mark /configure file as generated in .gitattributes https://bugs.python.org/issue46038 #46033: Duplicated sentence in for statement documentation https://bugs.python.org/issue46033 #46031: add POP_JUMP_IF_NOT_NONE and POP_JUMP_IF_NONE https://bugs.python.org/issue46031 #46023: Modules/makesetup generated rules ignore *disabled* https://bugs.python.org/issue46023 #46014: functools.singledispatch does not support Union types https://bugs.python.org/issue46014 #46013: Confusing period in object.__hash__ doc https://bugs.python.org/issue46013 #46006: [subinterpreter] _PyUnicode_EqualToASCIIId() issue with subint https://bugs.python.org/issue46006 #45979: Fix Tkinter tests with old Tk https://bugs.python.org/issue45979 #45970: Py_NewInterpreter causes bogus fatal error along the failure p https://bugs.python.org/issue45970 #45953: Statically allocate interpreter states as much as possible. https://bugs.python.org/issue45953 #45950: Reintroduce bootstrap_python for freezing https://bugs.python.org/issue45950 #45949: Provide pure-Python implementation of Programs/_freeze_module https://bugs.python.org/issue45949 #45947: Place dict (and values) pointers at a fixed (negative) offset https://bugs.python.org/issue45947 #45944: Avoid calling isatty() for most open() calls https://bugs.python.org/issue45944 Top 10 most discussed issues (10) ================================= #32683: isinstance is calling ob.__getattribute__ as a fallback instea https://bugs.python.org/issue32683 13 msgs #45995: string formatting: normalize negative zero https://bugs.python.org/issue45995 12 msgs #45459: Limited API support for Py_buffer https://bugs.python.org/issue45459 11 msgs #46006: [subinterpreter] _PyUnicode_EqualToASCIIId() issue with subint https://bugs.python.org/issue46006 11 msgs #45847: Port module setup to PY_STDLIB_MOD() macro and addext() https://bugs.python.org/issue45847 9 msgs #45950: Reintroduce bootstrap_python for freezing https://bugs.python.org/issue45950 9 msgs #45934: python curses newterm implementation https://bugs.python.org/issue45934 8 msgs #44092: [sqlite3] Remove special rollback handling https://bugs.python.org/issue44092 7 msgs #46021: fcntl module update supports FreeBSD F_KINFO flag https://bugs.python.org/issue46021 6 msgs #43683: Handle generator (and coroutine) state in the bytecode. https://bugs.python.org/issue43683 5 msgs Issues closed (100) =================== #8161: inconsistency behavior in ctypes.c_char_p dereferencing https://bugs.python.org/issue8161 closed by iritkatriel #12413: make faulthandler dump traceback of child processes https://bugs.python.org/issue12413 closed by vstinner #13548: line number when tracing an implicit return https://bugs.python.org/issue13548 closed by iritkatriel #15673: PEP 3121, 384 Refactoring applied to testcapi module https://bugs.python.org/issue15673 closed by erlendaasland #17113: argparse.RawDescriptionHelpFormatter should not delete blank l https://bugs.python.org/issue17113 closed by iritkatriel #17780: the test suite should use a TEMPDIR in the build directory, no https://bugs.python.org/issue17780 closed by iritkatriel #20751: Harmonize descriptor protocol documentation: direct call, supe https://bugs.python.org/issue20751 closed by rhettinger #20899: Nested namespace imports do not work inside zip archives https://bugs.python.org/issue20899 closed by iritkatriel #20936: test_strftime: enormous allocation, fails under Clang sanitize https://bugs.python.org/issue20936 closed by iritkatriel #21731: Calendar Problem with Windows (XP) https://bugs.python.org/issue21731 closed by iritkatriel #21952: fnmatch.py can appear in tracemalloc diffs https://bugs.python.org/issue21952 closed by vstinner #22282: ipaddress module accepts octal formatted IPv4 addresses in IPv https://bugs.python.org/issue22282 closed by iritkatriel #22910: test_pydoc test_synopsis_sourceless is a flaky test https://bugs.python.org/issue22910 closed by gregory.p.smith #23104: [Windows x86-64] ctypes: Incorrect function call https://bugs.python.org/issue23104 closed by iritkatriel #23317: Incorrect description of descriptor invocation in Python Langu https://bugs.python.org/issue23317 closed by rhettinger #24393: Test urllib2_localnet fails depending on host proxy configurat https://bugs.python.org/issue24393 closed by iritkatriel #24709: Unix build uses '-Wno-unused-result', which icc doesn't recogn https://bugs.python.org/issue24709 closed by ammar2 #26159: Unsafe to BaseEventLoop.set_debug(False) when PYTHONASYNCIODEB https://bugs.python.org/issue26159 closed by iritkatriel #27016: BlockingIOError not raised inside function. https://bugs.python.org/issue27016 closed by iritkatriel #27831: Python 3.4.5 leaks memory when attempting to load non-existent https://bugs.python.org/issue27831 closed by ammar2 #27946: elementtree calls PyDict_GetItem without owning a reference to https://bugs.python.org/issue27946 closed by serhiy.storchaka #28953: Use `raise from` when raising new IncompleteRead https://bugs.python.org/issue28953 closed by asvetlov #29309: Interpreter hang when interrupting a loop.run_in_executor() fu https://bugs.python.org/issue29309 closed by iritkatriel #29590: Incorrect stack traces when re-entering a generator/coroutine https://bugs.python.org/issue29590 closed by iritkatriel #29899: zlib missing when --enable--optimizations option appended https://bugs.python.org/issue29899 closed by iritkatriel #29988: with statements are not ensuring that __exit__ is called if __ https://bugs.python.org/issue29988 closed by Mark.Shannon #31139: Improve tracemalloc demo code in docs https://bugs.python.org/issue31139 closed by vstinner #31441: Descriptor example in documentation is confusing, possibly wro https://bugs.python.org/issue31441 closed by rhettinger #31735: Documentation incorrectly states how descriptors are invoked https://bugs.python.org/issue31735 closed by rhettinger #33080: regen-importlib is causing build races against other regen-all https://bugs.python.org/issue33080 closed by Alexander Kanavin #33632: undefined behaviour: signed integer overflow in threadmodule.c https://bugs.python.org/issue33632 closed by vstinner #34338: abstractmethod can run on classes https://bugs.python.org/issue34338 closed by iritkatriel #35362: list inheritor with abstract content does not raise https://bugs.python.org/issue35362 closed by iritkatriel #35419: Thread.is_alive while running Process.is_alive causes either p https://bugs.python.org/issue35419 closed by iritkatriel #35821: Clarify when logging events are propagated when propagate is t https://bugs.python.org/issue35821 closed by vinay.sajip #36392: IPv4Interface Object has no attributte prefixlen https://bugs.python.org/issue36392 closed by andrei.avk #36850: shutil.copy2 fails with even with source network filesystem no https://bugs.python.org/issue36850 closed by eryksun #37198: _parse_localename fail to parse 'en_IL' https://bugs.python.org/issue37198 closed by christian.heimes #39694: Incorrect dictionary unpacking when calling str.format https://bugs.python.org/issue39694 closed by rhettinger #41174: asyncio.coroutine decorator returns a non-generator function w https://bugs.python.org/issue41174 closed by iritkatriel #43418: FTPLib error when server returns byte message instead of strin https://bugs.python.org/issue43418 closed by andrei.avk #43474: http.server.BaseHTTPRequestHandler end_header() fails https://bugs.python.org/issue43474 closed by andrei.avk #43806: asyncio.StreamReader hangs when reading from pipe and other pr https://bugs.python.org/issue43806 closed by kormang #43931: Add the Python version to the API data. https://bugs.python.org/issue43931 closed by pablogsal #44016: Enum related deprecation warnings in test_httpservers and test https://bugs.python.org/issue44016 closed by vstinner #44035: Regenerating the configure script fails even if dependencies a https://bugs.python.org/issue44035 closed by christian.heimes #44077: IP_RECVTOS option is missing from socket module https://bugs.python.org/issue44077 closed by andrei.avk #44166: Make IndexError messages for list more informative https://bugs.python.org/issue44166 closed by rhettinger #44245: Cross-compilation of CPython 3.8 with _socket module using And https://bugs.python.org/issue44245 closed by laheller #44534: unittest.mock.Mock.unsafe doc is garbled https://bugs.python.org/issue44534 closed by andrei.avk #44735: Failed venv Activation With "&" In Folder Name https://bugs.python.org/issue44735 closed by eryksun #45359: TopologicalSorter is not Generic at runtime (but is in typeshe https://bugs.python.org/issue45359 closed by asvetlov #45415: Assert oparg < INSTR_OFFSET() https://bugs.python.org/issue45415 closed by steve.dower #45420: Python 3.10 final installation failure https://bugs.python.org/issue45420 closed by wyz23x2 #45607: Make it possible to enrich an exception's error message https://bugs.python.org/issue45607 closed by iritkatriel #45618: Documentation builds fail with Sphinx 3.2.1 https://bugs.python.org/issue45618 closed by pablogsal #45654: Freeze the runpy module. https://bugs.python.org/issue45654 closed by gvanrossum #45662: Incorrect repr of InitVar of a type alias https://bugs.python.org/issue45662 closed by serhiy.storchaka #45663: is_dataclass() does not work for dataclasses which are subclas https://bugs.python.org/issue45663 closed by serhiy.storchaka #45664: resolve_bases() and new_class() do not work with type alias of https://bugs.python.org/issue45664 closed by serhiy.storchaka #45732: Make python.org Windows and macOS installers use Tk 8.6.12 https://bugs.python.org/issue45732 closed by ned.deily #45816: Python does not support standalone MSVC v143 (VS 2022) Build T https://bugs.python.org/issue45816 closed by steve.dower #45823: python stopped working https://bugs.python.org/issue45823 closed by asvetlov #45885: Specialize COMPARE_OP https://bugs.python.org/issue45885 closed by Dennis Sweeney #45890: Add tests for tracing try-except-finally blocks https://bugs.python.org/issue45890 closed by iritkatriel #45916: documentation link error https://bugs.python.org/issue45916 closed by terry.reedy #45957: _tkinter.TclError: expected boolean value but got "" https://bugs.python.org/issue45957 closed by ned.deily #45963: Embed interpreter frame in generator. https://bugs.python.org/issue45963 closed by pablogsal #45964: gdb test fails when packaging Python 3.10 for openSUSE/Linux https://bugs.python.org/issue45964 closed by mcepl #45967: Tkinter.ttk.Treeview does not clear after opening and reopenin https://bugs.python.org/issue45967 closed by ned.deily #45971: calendar module does not recognize switch to Gregorian https://bugs.python.org/issue45971 closed by terry.reedy #45974: Using walrus produces different/unoptimized bytecode https://bugs.python.org/issue45974 closed by BTaskaya #45976: Random._randbelow() loses time by caching an attribute lookup https://bugs.python.org/issue45976 closed by rhettinger #45980: Why there isn't a ��Python 2.2�� for PyPI's classifiers? https://bugs.python.org/issue45980 closed by steven.daprano #45982: Bug in Error messages https://bugs.python.org/issue45982 closed by pablogsal #45983: PyType_Spec.name must remain valid after PyType_FromSpec https://bugs.python.org/issue45983 closed by ronaldoussoren #45984: Error messages for invalid string prefixes and potential attri https://bugs.python.org/issue45984 closed by pablogsal #45986: 3.10.0 ships with older tcl/tk DLLs than 3.9.9 causing Windows https://bugs.python.org/issue45986 closed by ned.deily #45987: os.chdir in unittest's test case causes RecursionError on Wind https://bugs.python.org/issue45987 closed by tos-kamiya #45989: Add new function or method to return the dict key with the max https://bugs.python.org/issue45989 closed by eric.smith #45993: Main branch of CPython does not build anymore on macOS https://bugs.python.org/issue45993 closed by sobolevn #45999: Links to packaging broken https://bugs.python.org/issue45999 closed by ned.deily #46000: NetBSD curses compatibility https://bugs.python.org/issue46000 closed by serhiy.storchaka #46001: JSON module documentation mentions OverflowError for case that https://bugs.python.org/issue46001 closed by serhiy.storchaka #46002: py Launcher for Windows with MSYS2 https://bugs.python.org/issue46002 closed by Zernoxi #46003: os.replace is not cross-platform: at least improve documentati https://bugs.python.org/issue46003 closed by hancos #46004: Incorrect bad token identified in 3.10.1 https://bugs.python.org/issue46004 closed by pablogsal #46007: [C API] PyUnicode_CHECK_INTERNED() doesn't work in the limited https://bugs.python.org/issue46007 closed by vstinner #46008: Prepare runtime/interp/thread state and init for upcoming chan https://bugs.python.org/issue46008 closed by eric.snow #46009: sending non-None values makes generator raise StopIteration on https://bugs.python.org/issue46009 closed by pablogsal #46012: unittest AsyncConnection not described https://bugs.python.org/issue46012 closed by asvetlov #46015: Windows venvs do not include DLLs directory https://bugs.python.org/issue46015 closed by steve.dower #46016: fcntl module add F_DUP2FD_CLOEXEC https://bugs.python.org/issue46016 closed by vstinner #46018: expm1 may incorrectly raise OverflowError on underflow https://bugs.python.org/issue46018 closed by steve.dower #46019: collections.Counter - Cast list of keys into set to remove ite https://bugs.python.org/issue46019 closed by rhettinger #46025: Raising in an atexit function in dev mode crashes https://bugs.python.org/issue46025 closed by pablogsal #46029: "ValueError: Invalid isoformat string" from a valid string https://bugs.python.org/issue46029 closed by eric.smith #46034: Patch-adding __init__ in a class takes no effect when called f https://bugs.python.org/issue46034 closed by vstinner #1512163: mailbox (2.5b1): locking doesn't work (esp. on FreeBSD) https://bugs.python.org/issue1512163 closed by iritkatriel #1653457: Python misbehaves when installed in / (patch attached) https://bugs.python.org/issue1653457 closed by iritkatriel

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