Mailman 3 December 2021 - Python-Dev

Remove asyncore, asynchat and smtpd modules
by Victor Stinner Dec. 3, 2021

Dec. 3, 2021

Hi, The asyncore module is a very old module of the Python stdlib for asynchronous programming, usually to handle network sockets concurrently. It's a common event loop, but its design has many flaws. The asyncio module was added to Python 3.4 with a well designed architecture. Twisted developers, who have like 10 to 20 years of experience in asynchronous programming, helped to design the asyncio API. By design, asyncio doesn't have flaws which would be really hard to fix in asyncore and asynchat. It was decided to start deprecating the asyncore, asynchat and smtpd modules in Python 3.6 released in 2016, 5 years ago. Python 3.10 emits DeprecationWarning. asynchat and smtpd are implemented with asyncore. Open issues in asyncore, asynchat and smtpd have been closed as "wont fix" because these modules are deprecated. These modules are basically no longer maintained. I propose to remove asyncore, aynchat and smtpd in Python 3.11 to reduce the Python maintenance burden, while asyncio remains available in stdlib and is maintained: * asyncore and asynchat can be replaced with asyncio * smtpd can be replaced with aiosmtpd which is based on asyncio: https://aiosmtpd.readthedocs.io/ If someone wants to continue using asyncore, asynchat or smtpd, it's trivial to copy Python 3.10 asyncore.py, asynchat.py and smtpd.py to their project, and maintain these files there. Someone is also free to continue maintaining these modules as third-party projects on PyPI. The removal is discussed at: https://bugs.python.org/issue28533 I wrote a PR to remove the 3 modules: https://github.com/python/cpython/pull/29521 ... in short, the intent is to move the asyncore, asynchat and smtpd maintenance outside the Pyhon project ;-) (if anyone still use them) Victor -- Night gathers, and now my watch begins. It shall not end until my death.

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Summary of Python tracker Issues
by Python tracker Dec. 3, 2021

Dec. 3, 2021

ACTIVITY SUMMARY (2021-11-26 - 2021-12-03) 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 7252 (-14) closed 50449 (+82) total 57701 (+68) Open issues with patches: 2884 Issues opened (47) ================== #44530: Propagate qualname from the compiler unit to code objects for https://bugs.python.org/issue44530 reopened by steve.dower #45813: Importing asyncio after deleting a coroutine object and before https://bugs.python.org/issue45813 reopened by Dennis Sweeney #45906: Python github installation issue https://bugs.python.org/issue45906 opened by mazen001.ahmed001 #45909: sysconfig --generate-posix-vars creates wrong file when cross https://bugs.python.org/issue45909 opened by christian.heimes #45910: mailbox should support options for calling email parser https://bugs.python.org/issue45910 opened by bpoaugust #45913: readline + GTK + Pytest Seg Fault with Python 3.7 and 3.10 on https://bugs.python.org/issue45913 opened by danyeaw #45914: Very first multiprocessing example not working on Windows 11 https://bugs.python.org/issue45914 opened by quattrozhou #45915: Use fcntl(fd, F_GETFD) to check whether an fd is valid https://bugs.python.org/issue45915 opened by christian.heimes #45916: documentation link error https://bugs.python.org/issue45916 opened by cookiez6 #45919: Use WinAPI GetFileType() in is_valid_fd() https://bugs.python.org/issue45919 opened by eryksun #45921: codecs module doesn't support iso-8859-6-i, iso-8859-6-e, iso- https://bugs.python.org/issue45921 opened by msapiro #45922: Many method, function, built-in... are not clickable and shoul https://bugs.python.org/issue45922 opened by Arthur-Milchior #45923: Improve performance of sys.settracing based tools. https://bugs.python.org/issue45923 opened by Mark.Shannon #45924: Incorrect traceback when future's exception is raised multiple https://bugs.python.org/issue45924 opened by iritkatriel #45925: Upgrade macOS and Windows installers to use SQLite 3.37.0 https://bugs.python.org/issue45925 opened by erlendaasland #45926: singledispatchmethod doesn't handle named arguments https://bugs.python.org/issue45926 opened by alisson276 #45927: timeit accepts -c/--clock and -t/--time without any functional https://bugs.python.org/issue45927 opened by lemburg #45929: extend json.tool --json-lines to ignore empty rows https://bugs.python.org/issue45929 opened by ZeD #45934: python curses newterm implementation https://bugs.python.org/issue45934 opened by draganic1 #45935: Add test for Issue11109: socketserver.ForkingMixIn leaves zomb https://bugs.python.org/issue45935 opened by iritkatriel #45937: Pdb can't use the commands through -c or .pdbrc files https://bugs.python.org/issue45937 opened by Zrincet #45938: EmailMessage as_bytes https://bugs.python.org/issue45938 opened by marc.villain #45940: add_multiarch_paths breaks cross compilation to Emscripten https://bugs.python.org/issue45940 opened by ethan smith #45942: shutil.copytree can raise OSErrors not wrapped in shutil.Error https://bugs.python.org/issue45942 opened by Floozutter #45944: Avoid calling isatty() for most open() calls https://bugs.python.org/issue45944 opened by collinanderson #45945: compileall.py throws a traceback when using -j0 and thus 'make https://bugs.python.org/issue45945 opened by Alexander Kanavin #45946: RecursionError when annotating a field with the same name as a https://bugs.python.org/issue45946 opened by Gobot1234 #45947: Place dict (and values) pointers at a fixed (negative) offset https://bugs.python.org/issue45947 opened by Mark.Shannon #45948: Unexpected instantiation behavior for xml.etree.ElementTree.XM https://bugs.python.org/issue45948 opened by rdsteed #45949: Provide pure-Python implementation of Programs/_freeze_module https://bugs.python.org/issue45949 opened by christian.heimes #45950: Reintroduce bootstrap_python for freezing https://bugs.python.org/issue45950 opened by christian.heimes #45953: Statically allocate interpreter states as much as possible. https://bugs.python.org/issue45953 opened by eric.snow #45955: Calling read() on HTTPError may cause KeyError in tempfile https://bugs.python.org/issue45955 opened by sivel #45957: _tkinter.TclError: expected boolean value but got "" https://bugs.python.org/issue45957 opened by amin-nejad #45959: Teach pprint about dict views https://bugs.python.org/issue45959 opened by rhettinger #45960: bullseye arm/v7 time.time() Operation not permitted https://bugs.python.org/issue45960 opened by SaschaJohn #45962: Clarify that PyModule_AddString{Constant,Macro} use utf-8 https://bugs.python.org/issue45962 opened by Antony.Lee #45963: Embed interpreter frame in generator. https://bugs.python.org/issue45963 opened by Mark.Shannon #45964: gdb test fails when packaging Python 3.10 for openSUSE/Linux https://bugs.python.org/issue45964 opened by mcepl #45965: fileinput.input(path, inplace=True) crashes for valid filename https://bugs.python.org/issue45965 opened by jamil.raichouni #45967: Tkinter.ttk.Treeview does not clear after opening and reopenin https://bugs.python.org/issue45967 opened by hmeneley #45968: Windows installer should add also "%USERPROFILE%\AppData\Roami https://bugs.python.org/issue45968 opened by lucatrv #45969: When uninstalling Python under Windows the "Scripts" folders s https://bugs.python.org/issue45969 opened by lucatrv #45970: Py_NewInterpreter causes bogus fatal error along the failure p https://bugs.python.org/issue45970 opened by jason.haslam #45971: calendar module issue https://bugs.python.org/issue45971 opened by ssv5088 #45972: typing.NamedTuple with default arguments without type annotati https://bugs.python.org/issue45972 opened by emontnemery #45973: Not possible to clear PyImport_Inittab after PyImport_AppendIn https://bugs.python.org/issue45973 opened by daniel-falk Most recent 15 issues with no replies (15) ========================================== #45973: Not possible to clear PyImport_Inittab after PyImport_AppendIn https://bugs.python.org/issue45973 #45970: Py_NewInterpreter causes bogus fatal error along the failure p https://bugs.python.org/issue45970 #45968: Windows installer should add also "%USERPROFILE%\AppData\Roami https://bugs.python.org/issue45968 #45965: fileinput.input(path, inplace=True) crashes for valid filename https://bugs.python.org/issue45965 #45963: Embed interpreter frame in generator. https://bugs.python.org/issue45963 #45962: Clarify that PyModule_AddString{Constant,Macro} use utf-8 https://bugs.python.org/issue45962 #45960: bullseye arm/v7 time.time() Operation not permitted https://bugs.python.org/issue45960 #45959: Teach pprint about dict views https://bugs.python.org/issue45959 #45955: Calling read() on HTTPError may cause KeyError in tempfile https://bugs.python.org/issue45955 #45953: Statically allocate interpreter states as much as possible. https://bugs.python.org/issue45953 #45948: Unexpected instantiation behavior for xml.etree.ElementTree.XM https://bugs.python.org/issue45948 #45947: Place dict (and values) pointers at a fixed (negative) offset https://bugs.python.org/issue45947 #45946: RecursionError when annotating a field with the same name as a https://bugs.python.org/issue45946 #45942: shutil.copytree can raise OSErrors not wrapped in shutil.Error https://bugs.python.org/issue45942 #45938: EmailMessage as_bytes https://bugs.python.org/issue45938 Most recent 15 issues waiting for review (15) ============================================= #45970: Py_NewInterpreter causes bogus fatal error along the failure p https://bugs.python.org/issue45970 #45964: gdb test fails when packaging Python 3.10 for openSUSE/Linux https://bugs.python.org/issue45964 #45963: Embed interpreter frame in generator. https://bugs.python.org/issue45963 #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 #45940: add_multiarch_paths breaks cross compilation to Emscripten https://bugs.python.org/issue45940 #45929: extend json.tool --json-lines to ignore empty rows https://bugs.python.org/issue45929 #45916: documentation link error https://bugs.python.org/issue45916 #45915: Use fcntl(fd, F_GETFD) to check whether an fd is valid https://bugs.python.org/issue45915 #45903: What��s New In Python 3.11: wrong reference to Signature.from https://bugs.python.org/issue45903 #45898: ctypes cfield.c defines duplicate ffi_type_* symbols https://bugs.python.org/issue45898 #45897: Frozen dataclasses with slots raise TypeError https://bugs.python.org/issue45897 Top 10 most discussed issues (10) ================================= #45476: [C API] PEP 674: Disallow using macros as l-value https://bugs.python.org/issue45476 16 msgs #45870: There's no readline module on Windows Python (cmd.Cmd) https://bugs.python.org/issue45870 13 msgs #40280: Consider supporting emscripten/webassembly as a build target https://bugs.python.org/issue40280 8 msgs #45739: The Python implementation of Decimal does not support the "N" https://bugs.python.org/issue45739 7 msgs #45957: _tkinter.TclError: expected boolean value but got "" https://bugs.python.org/issue45957 7 msgs #11352: Update cgi module doc https://bugs.python.org/issue11352 6 msgs #45972: typing.NamedTuple with default arguments without type annotati https://bugs.python.org/issue45972 6 msgs #45847: Port module setup to PY_STDLIB_MOD() macro and addext() https://bugs.python.org/issue45847 5 msgs #45964: gdb test fails when packaging Python 3.10 for openSUSE/Linux https://bugs.python.org/issue45964 5 msgs #28140: Give better errors for OS commands, like 'pip', in REPL, scrip https://bugs.python.org/issue28140 4 msgs Issues closed (79) ================== #7951: Should str.format allow negative indexes when used for __getit https://bugs.python.org/issue7951 closed by eric.smith #11109: socketserver.ForkingMixIn leaves zombies, also fails to reap a https://bugs.python.org/issue11109 closed by iritkatriel #12957: [doc] mmap.resize changes memory address of mmap'd region https://bugs.python.org/issue12957 closed by eryksun #17708: sys.flags.hash_randomization doesn't return correct value https://bugs.python.org/issue17708 closed by iritkatriel #19460: Add test for MIMENonMultipart https://bugs.python.org/issue19460 closed by asvetlov #19941: python -m imports non-ASCII .py file without encoding declarat https://bugs.python.org/issue19941 closed by eryksun #21020: PyMethodDef ml_doc is char* instead of const char* https://bugs.python.org/issue21020 closed by iritkatriel #21021: PyMemberDef name is char* instead of const char* https://bugs.python.org/issue21021 closed by iritkatriel #21616: argparse explodes with nargs='*' and a tuple metavar https://bugs.python.org/issue21616 closed by iritkatriel #22356: mention explicitly that stdlib assumes gmtime(0) epoch is 1970 https://bugs.python.org/issue22356 closed by iritkatriel #22656: `help` ignores `__doc__` of descriptors https://bugs.python.org/issue22656 closed by rhettinger #22811: _top_level_dir state leaks on defaultTestLoader https://bugs.python.org/issue22811 closed by iritkatriel #22942: Language Reference - optional comma https://bugs.python.org/issue22942 closed by iritkatriel #23538: New Windows installer in 3.5.0a1 breaks compatibility with Win https://bugs.python.org/issue23538 closed by iritkatriel #23599: single and double quotes stripped upon paste with MacPorts lib https://bugs.python.org/issue23599 closed by ned.deily #23991: ZipFile sanity checks https://bugs.python.org/issue23991 closed by iritkatriel #24124: Two versions of instructions for installing Python modules https://bugs.python.org/issue24124 closed by iritkatriel #24966: shutil.get_terminal_size() throws ValueError if stdout is deta https://bugs.python.org/issue24966 closed by eryksun #25238: Version added of context parameter for xmlrpc.client.ServerPro https://bugs.python.org/issue25238 closed by iritkatriel #25477: text mode for pkgutil.get_data https://bugs.python.org/issue25477 closed by iritkatriel #25810: Python 3 documentation for eval is incorrect https://bugs.python.org/issue25810 closed by iritkatriel #27161: Confusing exception in Path().with_name https://bugs.python.org/issue27161 closed by iritkatriel #28352: winfo_pathname(..) | window id "xyz" doesn't exist in this app https://bugs.python.org/issue28352 closed by iritkatriel #28422: multiprocessing Manager mutable type member access failure https://bugs.python.org/issue28422 closed by iritkatriel #28499: Logging module documentation needs a rework. https://bugs.python.org/issue28499 closed by vinay.sajip #30214: make_zip.py lacks command a few line options. https://bugs.python.org/issue30214 closed by iritkatriel #30533: missing feature in inspect module: getmembers_static https://bugs.python.org/issue30533 closed by dino.viehland #31042: Inconsistency in documentation of operator.index https://bugs.python.org/issue31042 closed by iritkatriel #31184: Fix data descriptor detection in inspect.getattr_static https://bugs.python.org/issue31184 closed by iritkatriel #33381: [doc] Incorrect documentation for strftime()/strptime() format https://bugs.python.org/issue33381 closed by iritkatriel #33581: Document "optional components that are commonly included in Py https://bugs.python.org/issue33581 closed by iritkatriel #35535: time.strptime() unexpectedly gives the same result for %U and https://bugs.python.org/issue35535 closed by iritkatriel #37699: Explicit mention of raised ValueError's after .detach() of und https://bugs.python.org/issue37699 closed by iritkatriel #38760: Document for urllib.error.HTTPError.headers Should Specify Wha https://bugs.python.org/issue38760 closed by iritkatriel #41102: ZipFile.namelist() does not match the actual files in .zip fil https://bugs.python.org/issue41102 closed by andrei.avk #42268: ./configure failing when --with-memory-sanitizer specified https://bugs.python.org/issue42268 closed by pablogsal #43498: "dictionary changed size during iteration" error in _ExecutorM https://bugs.python.org/issue43498 closed by asvetlov #43905: dataclasses.astuple (and .asdict) do deepcopy on all fields https://bugs.python.org/issue43905 closed by eric.smith #44391: PC/launcher.c��one more argument than required https://bugs.python.org/issue44391 closed by vinay.sajip #44413: OverflowError: mktime argument out of range after 2019 https://bugs.python.org/issue44413 closed by iritkatriel #44678: Seperate error message for discontinuous padding in binascii.a https://bugs.python.org/issue44678 closed by andrei.avk #44695: asdict use deep copy to dataclass instances https://bugs.python.org/issue44695 closed by andrei.avk #45582: Rewrite getpath.c in Python https://bugs.python.org/issue45582 closed by steve.dower #45614: traceback of exception with non-unicode __module__ https://bugs.python.org/issue45614 closed by iritkatriel #45721: Improve error message for OS command entered at >>> prompt https://bugs.python.org/issue45721 closed by terry.reedy #45725: test_freeze doesn't clean up after itself https://bugs.python.org/issue45725 closed by Mark.Shannon #45842: AddressSanitizer: bad-free - hello world c extension https://bugs.python.org/issue45842 closed by FrancescElies #45872: Turtle: invalid example for write doc https://bugs.python.org/issue45872 closed by terry.reedy #45875: gzip.decompress performance can be improved with memoryviews https://bugs.python.org/issue45875 closed by rhpvorderman #45876: Improve accuracy of stdev functions in statistics https://bugs.python.org/issue45876 closed by rhettinger #45878: Use `self.assertRaises` instead of `try/except` in `ctypes/tes https://bugs.python.org/issue45878 closed by sobolevn #45889: pathlib: Path.match does not work on paths https://bugs.python.org/issue45889 closed by nickpapior #45896: Conflicting statements in docs about default support for async https://bugs.python.org/issue45896 closed by asvetlov #45901: store app file type ignores command-line arguments https://bugs.python.org/issue45901 closed by steve.dower #45902: Bytes and bytesarrays can be sorted with a much faster count s https://bugs.python.org/issue45902 closed by gregory.p.smith #45904: Pasting the U00FF character into Python REPL misinterprets cha https://bugs.python.org/issue45904 closed by ned.deily #45907: Optimize literal comparisons and contains https://bugs.python.org/issue45907 closed by pablogsal #45908: dict.fromkeys insertion order https://bugs.python.org/issue45908 closed by rhettinger #45911: SystemError occured while running an extention https://bugs.python.org/issue45911 closed by serhiy.storchaka #45912: [argparse] Print texts starting with capital letters and finis https://bugs.python.org/issue45912 closed by eric.smith #45917: Add math.exp2() function: 2^x https://bugs.python.org/issue45917 closed by mark.dickinson #45918: Possibly use ROUND_05UP in decimal's localcontext() example https://bugs.python.org/issue45918 closed by rhettinger #45920: make doctest fails https://bugs.python.org/issue45920 closed by ned.deily #45928: Set up file stream for redirecting GC logs https://bugs.python.org/issue45928 closed by pablogsal #45930: Lambda function bug https://bugs.python.org/issue45930 closed by eric.smith #45931: Directory.Build.props/targets leaks from folders above the rep https://bugs.python.org/issue45931 closed by steve.dower #45932: EmailMessage incorrectly splits name and address header https://bugs.python.org/issue45932 closed by r.david.murray #45933: Illegal Instrution (Core Dumped) https://bugs.python.org/issue45933 closed by guacaplushy #45936: collections.Counter drops key if value is 0 and updating using https://bugs.python.org/issue45936 closed by rhettinger #45939: PyErr_SetObject documentation lacks mention of reference count https://bugs.python.org/issue45939 closed by serhiy.storchaka #45941: help("modules") segfaults on 3.11, MacOS https://bugs.python.org/issue45941 closed by iritkatriel #45943: Spam https://bugs.python.org/issue45943 closed by Jelle Zijlstra #45951: Debugger cannot be resolved https://bugs.python.org/issue45951 closed by boett1 #45952: Tools/c-analyzer is out-of-date. https://bugs.python.org/issue45952 closed by eric.snow #45954: Rename PyConfig.no_debug_ranges to PyConfig.code_debug_ranges https://bugs.python.org/issue45954 closed by vstinner #45956: Add scanf regular expressions to re https://bugs.python.org/issue45956 closed by tekknolagi #45958: Document typo in unpack_from() https://bugs.python.org/issue45958 closed by zach.ware #45961: [doc] Missing documentation for wait_for module https://bugs.python.org/issue45961 closed by iritkatriel #45966: Error in Multiplication https://bugs.python.org/issue45966 closed by eric.smith

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Oh look, I've been subscribed to python/issues-test-2 notifications again
by Larry Hastings Dec. 3, 2021

Dec. 3, 2021

I guess this is part of the migration from bpo to GitHub issues? Maybe the initial work could be done in a private repo, to cut down on the spurious email notifications to literally everybody subscribed to cpython? Which is a lot of people. //arry/

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bpo-41544: Add missing parameters to dummy.DummyProcess and dummy.Pool
by Martin Schröder Dec. 2, 2021

Dec. 2, 2021

Hi, could someone please review my pull request? https://github.com/python/cpython/pull/21869 It adds missing parameters to multiprocessing.dummy.DummyProcess in order to match the API of multiprocessing.Process. Best regards, Martin Schröder

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multiple inheritance and `__str__`
by Ethan Furman Dec. 1, 2021

Dec. 1, 2021

I ran into an issue today with `str()` not behaving as I thought it should. Given the following test script, what should happen? -- 8< ------------------------------ class Blah(object): def __str__(self): return 'blah' class Huh(int, Blah): pass class Hah(Blah, int): pass huh = Huh(7) hah = Hah(13) print(huh) print(hah) -- 8< ------------------------------ I thought I would get: 7 blah and indeed, that is what I got for Pythons 2.7 - 3.7. However, starting with Python 3.8 I started getting: blah blah To say the least, I was surprised. Some searching turned up issue 36793: "Do not define unneeded __str__ equal to __repr__" . As can be seen, `__str__` is needed for inheritance to work properly. Thoughts on reverting that patch? -- ~Ethan~

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