Mailman 3 June 2020 - Python-Dev

Making asyncio more thread-friendly
by Celelibi 06 Jun '20

06 Jun '20

Hello world, I always knew asynchronous programming is awesome. And having a language support for it really help its adoption by limiting the existence of incompatible event frameworks which would be a pain to use together. However, the asynchronousness is very contaminating. This makes it difficult to make threads and asyncio coexist in a single application as a transition period while the thread model is replaced with the async one. And a smooth transition is of course needed because a series of smaller changes that are separately testable for correctness is a lot easier to develop that one large chunk of rewrite. Unless I'm mistaken, there's no obvious way to have a function run a coroutine in a given event loop, no matter if the loop in running or not, no matter if it's running in the current context or not. There are at least 3 cases that I can see: 1) The loop isn't running -> run_until_complete is the solution. 2) The loop is running in another context -> we might use call_soon_threadsafe and wait for the result. 3) The loop is running in the current context but we're not in a coroutine -> there's currently not much we can do without some major code change. What I'd like to propose is that run_until_complete handle all three cases. Including the third, which imply that the event loop could be run recursively. I also found out that the loop argument to most standard asyncio classes has been deprecated. I think it's pretty crazy as it prevent objects from being instanciated in one thread and used in another. Which would again imply significant code change in one single go for applications trying to switch from threads to asyncio. Did I miss an obvious way to make the migration from threads to asyncio easier? It becomes harder and harder to not believe that python is purposfully trying to make this kind of migration more painful. Best regards, Celelibi

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Upcoming cutoffs for 3.9, 3.8, 3.7, and 3.6 releases! Last chance for 3.7 bugfixes!
by Ned Deily 06 Jun '20

06 Jun '20

https://discuss.python.org/t/upcoming-cutoffs-for-3-9-3-8-3-7-and-3-6-relea… -- Ned Deily nad(a)python.org -- []

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Summary of Python tracker Issues
by Python tracker 05 Jun '20

05 Jun '20

ACTIVITY SUMMARY (2020-05-29 - 2020-06-05) 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 7444 (-43) closed 45180 (+100) total 52624 (+57) Open issues with patches: 3008 Issues opened (49) ================== #25782: CPython hangs on error __context__ set to the error itself https://bugs.python.org/issue25782 reopened by serhiy.storchaka #37483: Add PyObject_CallOneArg() https://bugs.python.org/issue37483 reopened by vstinner #40679: show class name in method invocation TypeError https://bugs.python.org/issue40679 reopened by vstinner #40805: Can no longer patch flask.g https://bugs.python.org/issue40805 reopened by cjw296 #40821: os.getlogin() not working https://bugs.python.org/issue40821 opened by Manickaraja Kumarappan #40822: Drop support for SQLite pre 3.7.15 https://bugs.python.org/issue40822 opened by erlendaasland #40823: Don't use obsolete unittest.makeSuite() in sqlite3 tests https://bugs.python.org/issue40823 opened by erlendaasland #40824: Unexpected errors in __iter__ are masked in "in" and the opera https://bugs.python.org/issue40824 opened by serhiy.storchaka #40825: Add a "strict" parameter to csv.writer and csv.DictWriter https://bugs.python.org/issue40825 opened by eric.smith #40826: PyOS_InterruptOccurred() now requires to hold the GIL: PyOS_Re https://bugs.python.org/issue40826 opened by Jelle Zijlstra #40827: os.readlink should support getting the target's printname in W https://bugs.python.org/issue40827 opened by eryksun #40828: shared memory problems with multiprocessing.Pool https://bugs.python.org/issue40828 opened by trapezoid677 #40830: Certain uses of dictionary unpacking raise TypeError https://bugs.python.org/issue40830 opened by Kodiologist #40832: hi param in bisect module should not accept negative values https://bugs.python.org/issue40832 opened by samuel72 #40833: Clarify docstring of Path.rename https://bugs.python.org/issue40833 opened by cool-RR #40834: sending str via channel caused truncate on last character https://bugs.python.org/issue40834 opened by asaka #40835: Incorrect handling for msgctxt in msgfmt.py https://bugs.python.org/issue40835 opened by da1910 #40836: logging.fatal() and logging.Logger.fatal() should raise a Depr https://bugs.python.org/issue40836 opened by remi.lapeyre #40837: email.utils.encode_rfc2231(string, None, None) returns broken https://bugs.python.org/issue40837 opened by spaceone #40838: inspect.getsourcefile documentation doesn't mention it can ret https://bugs.python.org/issue40838 opened by pekka.klarck #40840: lzma.h file not found building on macOS https://bugs.python.org/issue40840 opened by jaraco #40841: Provide mimetypes.sniff API as stdlib https://bugs.python.org/issue40841 opened by corona10 #40842: _Pickler_CommitFrame() always returns 0 and its return code is https://bugs.python.org/issue40842 opened by remi.lapeyre #40843: tarfile: ignore_zeros = True exceedingly slow on a sparse tar https://bugs.python.org/issue40843 opened by mxmlnkn #40846: Misleading line in documentation https://bugs.python.org/issue40846 opened by J Arun Mani #40847: New parser considers empty line following a backslash to be a https://bugs.python.org/issue40847 opened by adamwill #40849: Expose X509_V_FLAG_PARTIAL_CHAIN ssl flag https://bugs.python.org/issue40849 opened by l0x #40851: subprocess.Popen: impossible to show console window when shell https://bugs.python.org/issue40851 opened by akdor1154 #40854: [Patch] Allow overriding sys.platlibdir https://bugs.python.org/issue40854 opened by smani #40855: statistics.stdev ignore xbar argument https://bugs.python.org/issue40855 opened by Folket #40856: IDLE line numbering should be light gray https://bugs.python.org/issue40856 opened by rhettinger #40857: tempfile.TemporaryDirectory() context manager can fail to prop https://bugs.python.org/issue40857 opened by granchester #40858: ntpath.realpath fails for broken symlinks with rooted target p https://bugs.python.org/issue40858 opened by eryksun #40859: Update Windows build to use xz-5.2.5 https://bugs.python.org/issue40859 opened by Ma Lin #40860: Exception in multiprocessing/context.py under load https://bugs.python.org/issue40860 opened by Arkady M #40861: On Windows, liblzma is always built without optimization https://bugs.python.org/issue40861 opened by nnemkin #40862: argparse.BooleanOptionalAction accept and silently discard its https://bugs.python.org/issue40862 opened by remi.lapeyre #40864: spec_set/autospec/spec seems to not be reading attributes defi https://bugs.python.org/issue40864 opened by efagerberg #40866: Use PyModule_AddType() in posix module initialisation https://bugs.python.org/issue40866 opened by erlendaasland #40867: Remove unused include in Module/_randommodule.c https://bugs.python.org/issue40867 opened by erlendaasland #40868: io.TextIOBase.buffer is not necessarily a buffer https://bugs.python.org/issue40868 opened by mjacob #40869: errno missing descriptions https://bugs.python.org/issue40869 opened by YoSTEALTH #40870: Custom AST can crash Python (debug build) https://bugs.python.org/issue40870 opened by BTaskaya #40871: threading.Event.wait_unset() https://bugs.python.org/issue40871 opened by Jacob Kunnappally #40872: multiprocess.Lock is missing the locked() method https://bugs.python.org/issue40872 opened by remi.lapeyre #40873: Something wrong with html.unescape() https://bugs.python.org/issue40873 opened by Валентин Dreyk #40874: Update to libmpdec-2.5.0 https://bugs.python.org/issue40874 opened by skrah #40875: Implement __repr__ for classes in csv module https://bugs.python.org/issue40875 opened by cool-RR #40876: Clarify error message in csv module https://bugs.python.org/issue40876 opened by cool-RR Most recent 15 issues with no replies (15) ========================================== #40876: Clarify error message in csv module https://bugs.python.org/issue40876 #40875: Implement __repr__ for classes in csv module https://bugs.python.org/issue40875 #40873: Something wrong with html.unescape() https://bugs.python.org/issue40873 #40872: multiprocess.Lock is missing the locked() method https://bugs.python.org/issue40872 #40871: threading.Event.wait_unset() https://bugs.python.org/issue40871 #40869: errno missing descriptions https://bugs.python.org/issue40869 #40868: io.TextIOBase.buffer is not necessarily a buffer https://bugs.python.org/issue40868 #40867: Remove unused include in Module/_randommodule.c https://bugs.python.org/issue40867 #40866: Use PyModule_AddType() in posix module initialisation https://bugs.python.org/issue40866 #40861: On Windows, liblzma is always built without optimization https://bugs.python.org/issue40861 #40859: Update Windows build to use xz-5.2.5 https://bugs.python.org/issue40859 #40858: ntpath.realpath fails for broken symlinks with rooted target p https://bugs.python.org/issue40858 #40847: New parser considers empty line following a backslash to be a https://bugs.python.org/issue40847 #40843: tarfile: ignore_zeros = True exceedingly slow on a sparse tar https://bugs.python.org/issue40843 #40842: _Pickler_CommitFrame() always returns 0 and its return code is https://bugs.python.org/issue40842 Most recent 15 issues waiting for review (15) ============================================= #40876: Clarify error message in csv module https://bugs.python.org/issue40876 #40874: Update to libmpdec-2.5.0 https://bugs.python.org/issue40874 #40872: multiprocess.Lock is missing the locked() method https://bugs.python.org/issue40872 #40870: Custom AST can crash Python (debug build) https://bugs.python.org/issue40870 #40867: Remove unused include in Module/_randommodule.c https://bugs.python.org/issue40867 #40866: Use PyModule_AddType() in posix module initialisation https://bugs.python.org/issue40866 #40862: argparse.BooleanOptionalAction accept and silently discard its https://bugs.python.org/issue40862 #40859: Update Windows build to use xz-5.2.5 https://bugs.python.org/issue40859 #40854: [Patch] Allow overriding sys.platlibdir https://bugs.python.org/issue40854 #40846: Misleading line in documentation https://bugs.python.org/issue40846 #40836: logging.fatal() and logging.Logger.fatal() should raise a Depr https://bugs.python.org/issue40836 #40835: Incorrect handling for msgctxt in msgfmt.py https://bugs.python.org/issue40835 #40834: sending str via channel caused truncate on last character https://bugs.python.org/issue40834 #40833: Clarify docstring of Path.rename https://bugs.python.org/issue40833 #40830: Certain uses of dictionary unpacking raise TypeError https://bugs.python.org/issue40830 Top 10 most discussed issues (10) ================================= #40826: PyOS_InterruptOccurred() now requires to hold the GIL: PyOS_Re https://bugs.python.org/issue40826 23 msgs #17005: Add a topological sort algorithm https://bugs.python.org/issue17005 18 msgs #40521: [subinterpreters] Make free lists and unicode caches per-inter https://bugs.python.org/issue40521 13 msgs #40825: Add a "strict" parameter to csv.writer and csv.DictWriter https://bugs.python.org/issue40825 9 msgs #40805: Can no longer patch flask.g https://bugs.python.org/issue40805 7 msgs #40807: Codeop: Show warnings once during _maybe_compile https://bugs.python.org/issue40807 7 msgs #22167: iglob() has misleading documentation (does indeed store names https://bugs.python.org/issue22167 6 msgs #27580: CSV Null Byte Error https://bugs.python.org/issue27580 6 msgs #39573: [C API] Make PyObject an opaque structure in the limited C API https://bugs.python.org/issue39573 6 msgs #40403: pdb does not drop into debugger upon SyntaxError caused by ast https://bugs.python.org/issue40403 5 msgs Issues closed (93) ================== #2481: locale.strxfrm does not work with Unicode strings https://bugs.python.org/issue2481 closed by serhiy.storchaka #5184: Add -3 warning for extension types that implement tp_compare b https://bugs.python.org/issue5184 closed by serhiy.storchaka #8387: use universal newline mode in csv module examples https://bugs.python.org/issue8387 closed by serhiy.storchaka #8502: support plurals in pygettext https://bugs.python.org/issue8502 closed by serhiy.storchaka #8893: file.{read,readlines} behaviour on Solaris https://bugs.python.org/issue8893 closed by serhiy.storchaka #9196: Improve docs for string interpolation "%s" re Unicode strings https://bugs.python.org/issue9196 closed by serhiy.storchaka #9326: Error message for incorrect number of (function) args is incor https://bugs.python.org/issue9326 closed by serhiy.storchaka #9751: _PyInstance_Lookup() defeats its purpose https://bugs.python.org/issue9751 closed by serhiy.storchaka #10631: ZipFile and current directory change https://bugs.python.org/issue10631 closed by serhiy.storchaka #11309: #include <wctype.h> in Objects/unicodetype_db.h and Objects/un https://bugs.python.org/issue11309 closed by serhiy.storchaka #11315: unicode support in Cookie module https://bugs.python.org/issue11315 closed by serhiy.storchaka #11722: mingw64 does not link when building extensions https://bugs.python.org/issue11722 closed by serhiy.storchaka #11767: Maildir iterator leaks file descriptors by default https://bugs.python.org/issue11767 closed by serhiy.storchaka #12398: Sending binary data with a POST request in httplib can cause U https://bugs.python.org/issue12398 closed by serhiy.storchaka #13171: Bug in file.read(), can access unknown data. https://bugs.python.org/issue13171 closed by serhiy.storchaka #14847: AttributeError: NoneType has no attribute 'utf_8_decode' https://bugs.python.org/issue14847 closed by serhiy.storchaka #14978: distutils Extension fails to be created with unicode package n https://bugs.python.org/issue14978 closed by serhiy.storchaka #15276: unicode format does not really work in Python 2.x https://bugs.python.org/issue15276 closed by serhiy.storchaka #15918: subprocess.Popen reads errpipe_read incorrectly, can result in https://bugs.python.org/issue15918 closed by serhiy.storchaka #15951: string.Formatter returns str for empty unicode template https://bugs.python.org/issue15951 closed by serhiy.storchaka #15952: format(value) and value.__format__() behave differently with u https://bugs.python.org/issue15952 closed by serhiy.storchaka #16125: open accepts arbitrary mode strings as long as they contain U https://bugs.python.org/issue16125 closed by serhiy.storchaka #16891: Fix docs about module search order https://bugs.python.org/issue16891 closed by serhiy.storchaka #17112: Some doctest-based tests fail when run with python -OO https://bugs.python.org/issue17112 closed by serhiy.storchaka #17191: pdb list shows unexpected code when stack frame includes a try https://bugs.python.org/issue17191 closed by serhiy.storchaka #17387: Error in C API documentation of PySequenceMethods https://bugs.python.org/issue17387 closed by serhiy.storchaka #17420: bdist_wininst does not play well with unicode descriptions https://bugs.python.org/issue17420 closed by serhiy.storchaka #17544: regex code re-raises exceptions on success https://bugs.python.org/issue17544 closed by serhiy.storchaka #18695: os.statvfs() not working well with unicode paths https://bugs.python.org/issue18695 closed by serhiy.storchaka #20192: pprint chokes on set containing frozenset https://bugs.python.org/issue20192 closed by serhiy.storchaka #20296: PyArg_ParseTuple 2.X docs mention int for "t#", but "Py_ssize_ https://bugs.python.org/issue20296 closed by serhiy.storchaka #20686: Confusing statement about unicode strings in tutorial introduc https://bugs.python.org/issue20686 closed by serhiy.storchaka #20785: Missing symbols in Python27.lib (Windows 64bit) https://bugs.python.org/issue20785 closed by serhiy.storchaka #20989: XML File I/O Misbehavior with open() when the flag is 'r+' https://bugs.python.org/issue20989 closed by serhiy.storchaka #21547: '!s' formatting documentation bug https://bugs.python.org/issue21547 closed by serhiy.storchaka #21561: help() on enum34 enumeration class creates only a dummy docume https://bugs.python.org/issue21561 closed by serhiy.storchaka #21785: __getitem__ and __setitem__ try to be smart when invoked with https://bugs.python.org/issue21785 closed by serhiy.storchaka #21796: tempfile.py", line 83, in <module> once_lock = _allocate_lock( https://bugs.python.org/issue21796 closed by serhiy.storchaka #21889: https://docs.python.org/2/library/multiprocessing.html#process https://bugs.python.org/issue21889 closed by serhiy.storchaka #21929: Rounding properly https://bugs.python.org/issue21929 closed by serhiy.storchaka #22052: Comparison operators called in reverse order for subclasses wi https://bugs.python.org/issue22052 closed by serhiy.storchaka #22666: email.Header no encoding of unicode strings containing newline https://bugs.python.org/issue22666 closed by serhiy.storchaka #22720: Obscure error w/ windows online-only file https://bugs.python.org/issue22720 closed by serhiy.storchaka #22750: xmlapp.py display bug when validate XML by DTD https://bugs.python.org/issue22750 closed by serhiy.storchaka #23315: tempfile.mkdtemp fails with non-ascii paths on Python 2 https://bugs.python.org/issue23315 closed by serhiy.storchaka #23514: multiprocessing documentation - little more examples for paral https://bugs.python.org/issue23514 closed by serhiy.storchaka #23567: os.stat() tuple access vs named attribute access int vs float https://bugs.python.org/issue23567 closed by serhiy.storchaka #23850: Missing documentation for Py_TPFLAGS_HAVE_NEWBUFFER https://bugs.python.org/issue23850 closed by serhiy.storchaka #24126: newlines attribute does not get set after calling readline() https://bugs.python.org/issue24126 closed by serhiy.storchaka #24256: threading.Timer is not a class https://bugs.python.org/issue24256 closed by serhiy.storchaka #24341: Test suite emits many DeprecationWarnings about sys.exc_clear( https://bugs.python.org/issue24341 closed by serhiy.storchaka #24880: ctypeslib patch for regular expression for symbols to include https://bugs.python.org/issue24880 closed by serhiy.storchaka #25511: multiprocessing pool blocks SIGTERM from being handled https://bugs.python.org/issue25511 closed by serhiy.storchaka #25661: tokenize.untokenize does not maintain the order of tabbed inde https://bugs.python.org/issue25661 closed by serhiy.storchaka #25714: Consider isinstance(..., numbers.Integral) instead of isinstan https://bugs.python.org/issue25714 closed by serhiy.storchaka #26369: unicode.decode and str.encode are unnecessarily confusing for https://bugs.python.org/issue26369 closed by serhiy.storchaka #26433: urllib.urlencode() does not explain how to handle unicode https://bugs.python.org/issue26433 closed by serhiy.storchaka #26543: [EASY] imaplib noop Debug: bytes vs Unicode bug in debug mode https://bugs.python.org/issue26543 closed by vstinner #27037: Universal newline support for zipFile.ZipExtFile.read() is not https://bugs.python.org/issue27037 closed by serhiy.storchaka #28403: Porting guide: disabling & warning on implicit unicode convers https://bugs.python.org/issue28403 closed by serhiy.storchaka #29017: Docs: PySide is provided by 'The Qt Company' and not by 'Nokia https://bugs.python.org/issue29017 closed by benjamin.peterson #29236: 'an ASCII string of one or more PEM-encoded certificates' need https://bugs.python.org/issue29236 closed by serhiy.storchaka #29323: Wrong documentation (Library) for unicode and str comparison https://bugs.python.org/issue29323 closed by serhiy.storchaka #31869: commentary on ssl.PROTOCOL_TLS https://bugs.python.org/issue31869 closed by christian.heimes #33491: mistype of method's name https://bugs.python.org/issue33491 closed by serhiy.storchaka #33618: Support TLS 1.3 https://bugs.python.org/issue33618 closed by christian.heimes #33725: Python crashes on macOS after fork with no exec https://bugs.python.org/issue33725 closed by barry #33740: PyByteArray_AsString C-API description lacks the assurance, th https://bugs.python.org/issue33740 closed by serhiy.storchaka #35151: Python 2 xml.etree.ElementTree documentation tutorial uses und https://bugs.python.org/issue35151 closed by serhiy.storchaka #36724: Clear _PyRuntime at exit https://bugs.python.org/issue36724 closed by vstinner #39583: Remove superfluous "extern C" bits from Include/cpython/*.h https://bugs.python.org/issue39583 closed by vstinner #39593: ctypes s_set() uses strlen() and so truncates string at null c https://bugs.python.org/issue39593 closed by vstinner #40061: Possible refleak in _asynciomodule.c future_add_done_callback( https://bugs.python.org/issue40061 closed by aeros #40244: AIX: build: _PyObject_GC_TRACK Asstertion failure https://bugs.python.org/issue40244 closed by vstinner #40759: Deprecate the symbol module https://bugs.python.org/issue40759 closed by BTaskaya #40762: Writing bytes using CSV module results in b prefixed strings https://bugs.python.org/issue40762 closed by terry.reedy #40767: Allow pure Wayland to get default XDG webbrowser https://bugs.python.org/issue40767 closed by orsenthil #40788: Build issue Solaris 10 Sparc https://bugs.python.org/issue40788 closed by munocat #40798: The deprecated-removed Sphinx extension need to change the err https://bugs.python.org/issue40798 closed by mdk #40829: Add a what's new entry about deprecation of random.shuffle's r https://bugs.python.org/issue40829 closed by BTaskaya #40831: Wrong statement that bytes paths are deprecated under Windows https://bugs.python.org/issue40831 closed by steve.dower #40839: Disallow calling PyDict_GetItem() with the GIL released https://bugs.python.org/issue40839 closed by vstinner #40844: Alternate ways of running coroutines https://bugs.python.org/issue40844 closed by yselivanov #40845: idna encoding fails for Cherokee symbols https://bugs.python.org/issue40845 closed by christian.heimes #40848: compile() can compile a bare starred expression with `PyCF_ONL https://bugs.python.org/issue40848 closed by pablogsal #40850: Programming FAQ - variables local to the lambdas https://bugs.python.org/issue40850 closed by rhettinger #40852: Dictionary created with dict.fromkeys have issues (all explain https://bugs.python.org/issue40852 closed by christian.heimes #40853: "set() in set()" should raise TypeError: unhashable type: 'set https://bugs.python.org/issue40853 closed by rhettinger #40863: bytes.decode changes/destroys line endings on windows https://bugs.python.org/issue40863 closed by eryksun #40865: Remove unused insint() macro from the hash modules https://bugs.python.org/issue40865 closed by christian.heimes #40877: Code coverage is blocking a merge again https://bugs.python.org/issue40877 closed by skrah #1294232: Error in metaclass search order https://bugs.python.org/issue1294232 closed by serhiy.storchaka #1706039: Added clearerr() to clear EOF state https://bugs.python.org/issue1706039 closed by serhiy.storchaka

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Can we stop adding to the C API, please?
by Mark Shannon 05 Jun '20

05 Jun '20

Hi, The size of the C API, as measured by `git grep PyAPI_FUNC | wc -l` has been steadily increasing over the last few releases. 3.5 1237 3.6 1304 3.7 1408 3.8 1478 3.9 1518 For reference the 2.7 branch has "only" 973 functions I've heard many criticisms of Python 2 over the years, but that it needed a bigger C API wasn't one of them ;) Why are these functions being added? Wasn't 1000 C functions enough? Every one of these functions represents a maintenance burden. Removing them is painful and takes a lot of effort, but adding them is done casually, without a PEP or, in many cases, even a review. We need to address what to do about the C API in the long term, but for now can we just stop making it larger? Please. Also, can we remove all the new API functions added in 3.9 before the release and it is too late? Cheers, Mark.

9 12

Summary of Python tracker Issues
by Python tracker 05 Jun '20

05 Jun '20

ACTIVITY SUMMARY (2020-05-22 - 2020-05-29) 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 7487 ( +9) closed 45080 (+80) total 52567 (+89) Open issues with patches: 3011 Issues opened (58) ================== #39343: Travis CI: documentation job fails in library/nntplib.rst with https://bugs.python.org/issue39343 reopened by chris.jerdonek #40133: Provide additional matchers for unittest.mock https://bugs.python.org/issue40133 reopened by gregory.p.smith #40733: Make IDLE doc more visible, mention in main python docs page https://bugs.python.org/issue40733 opened by phr #40734: /usr/bin surprisingly in sys.path under IDLE https://bugs.python.org/issue40734 opened by phr #40735: test_nntplib: sporadic failures, NetworkedNNTP_SSLTests.test_w https://bugs.python.org/issue40735 opened by chris.jerdonek #40736: better message for re.search TypeError ("expected string or by https://bugs.python.org/issue40736 opened by chris.jerdonek #40739: find_library broken for binutils >= 2.32 / 2.34 https://bugs.python.org/issue40739 opened by Frederik Rietdijk #40741: Upgrade to SQLite v3.32.1 in Windows and macOS builds https://bugs.python.org/issue40741 opened by erlendaasland #40742: Doc: Parallel build break audit table https://bugs.python.org/issue40742 opened by mdk #40743: [CMake] It's 2020, where is CMake? https://bugs.python.org/issue40743 opened by TheUltimatePineapple #40744: Explicitly drop support for SQLite version < 3.7.3 https://bugs.python.org/issue40744 opened by erlendaasland #40745: Typo in library/typing https://bugs.python.org/issue40745 opened by hectorcanto #40746: test_gdb failing on Raspbian on 3.9, regression from 3.8 https://bugs.python.org/issue40746 opened by gregory.p.smith #40747: sysconfig.get_config_var("py_version_nodot") should return 3_1 https://bugs.python.org/issue40747 opened by mattip #40748: Tutorial 4.7 More on Defining Functions missing screen prompts https://bugs.python.org/issue40748 opened by Chas Belov #40749: Consider adding decorator for required inner class https://bugs.python.org/issue40749 opened by Elijah Rippeth #40754: ModuleNotFoundError: No module named '_testinternalcapi' under https://bugs.python.org/issue40754 opened by honglei.jiang #40756: Second argument of LoggerAdapter.__init__ should default to No https://bugs.python.org/issue40756 opened by arturoescaip #40757: tarfile: ignore_zeros = True won't raise exception even on inv https://bugs.python.org/issue40757 opened by mxmlnkn #40758: For 7.2.7. Code Examples, distinguish between the Tutorial and https://bugs.python.org/issue40758 opened by Chas Belov #40759: Deprecate the symbol module https://bugs.python.org/issue40759 opened by BTaskaya #40762: Writing bytes using CSV module results in b prefixed strings https://bugs.python.org/issue40762 opened by sidhant #40763: zipfile.extractall is safe by now https://bugs.python.org/issue40763 opened by VA #40766: Add support for SQLITE_DIRECTONLY and SQLITE_INNOCUOUS for use https://bugs.python.org/issue40766 opened by erlendaasland #40767: Allow pure Wayland to get default XDG webbrowser https://bugs.python.org/issue40767 opened by Jeremy Attali #40769: Pegen: cover extra surrounding parentheses for invalid annotat https://bugs.python.org/issue40769 opened by BTaskaya #40770: RFE: Run linkchecker on documentation on the CI https://bugs.python.org/issue40770 opened by hroncok #40771: python3 fromtimestamp generates OSError https://bugs.python.org/issue40771 opened by jamercee #40772: module 'resource' has no attribute 'RLIMIT_VMEM' https://bugs.python.org/issue40772 opened by Titusz Ban #40773: DOC: Fix rendering for 'retval' on the pdb page https://bugs.python.org/issue40773 opened by cheryl.sabella #40775: Fix missing dot in sqlite3 Node type name https://bugs.python.org/issue40775 opened by erlendaasland #40777: _datetimemodule.c:3328:16: error: initializer element is not c https://bugs.python.org/issue40777 opened by smani #40782: AbstactEventLoop.run_in_executor is listed as an async method, https://bugs.python.org/issue40782 opened by jamesba #40785: `mmap.mmap(..., 0)` doesn't work as advertised in docs (fails https://bugs.python.org/issue40785 opened by ngie #40786: madvise should be accessible outside of mmap instance https://bugs.python.org/issue40786 opened by ngie #40788: Build issue Solaris 10 Sparc https://bugs.python.org/issue40788 opened by munocat #40791: hmac.compare_digest could try harder to be constant-time. https://bugs.python.org/issue40791 opened by Devin Jeanpierre #40794: dataclass signatures and docstrings w/future-annotations https://bugs.python.org/issue40794 opened by BTaskaya #40797: multiprocessing.Semaphore has undocumented get_value() method https://bugs.python.org/issue40797 opened by remi.lapeyre #40798: The deprecated-removed Sphinx extension need to change the err https://bugs.python.org/issue40798 opened by remi.lapeyre #40799: Create Lib/_pydatetime.py file to optimize "import datetime" w https://bugs.python.org/issue40799 opened by vstinner #40800: asyncio.sleep(0) should "yield" back to the event loop, but it https://bugs.python.org/issue40800 opened by Davy Durham #40801: Expose PyFloat_AsDouble at Python level: operator.as_float? https://bugs.python.org/issue40801 opened by mark.dickinson #40802: AbstractEventLoop.shutdown_default_executor breaks backwards c https://bugs.python.org/issue40802 opened by petr.viktorin #40804: Bug report in python3.6.8 using argparse module https://bugs.python.org/issue40804 opened by amansi26 #40805: Can no longer patch flask.g https://bugs.python.org/issue40805 opened by Rob Taft #40807: CODEOP: Show warnings once during _maybe_compile https://bugs.python.org/issue40807 opened by cheryl.sabella #40808: test_venv fails with HOME=/ on AMD64 FreeBSD Non-Debug 3.x https://bugs.python.org/issue40808 opened by vstinner #40810: sqlite3 test CheckTraceCallbackContent fails for sqlite v3.7.3 https://bugs.python.org/issue40810 opened by erlendaasland #40811: Allow to create new Event Loops on Threads https://bugs.python.org/issue40811 opened by Christian Exposito #40813: Output SyntaxError is not defective https://bugs.python.org/issue40813 opened by timofej #40814: Update typing module documentation based on PEP 585 https://bugs.python.org/issue40814 opened by Matúš Valo #40815: Multiprocessing docs don't describe thread-safety https://bugs.python.org/issue40815 opened by bjs #40816: Add missed AsyncContextDecorator to contextlib https://bugs.python.org/issue40816 opened by heckad #40817: Document the asyncio shell https://bugs.python.org/issue40817 opened by remi.lapeyre #40818: Run sys.__interactivehook__ for asyncio REPLs https://bugs.python.org/issue40818 opened by remi.lapeyre #40819: Idle Context Menu Copy/Cut Grayed Out https://bugs.python.org/issue40819 opened by BevInTX #40820: Mock Call attributes args and kwargs have no changeversion https://bugs.python.org/issue40820 opened by Andrius Gobis Most recent 15 issues with no replies (15) ========================================== #40820: Mock Call attributes args and kwargs have no changeversion https://bugs.python.org/issue40820 #40819: Idle Context Menu Copy/Cut Grayed Out https://bugs.python.org/issue40819 #40818: Run sys.__interactivehook__ for asyncio REPLs https://bugs.python.org/issue40818 #40816: Add missed AsyncContextDecorator to contextlib https://bugs.python.org/issue40816 #40815: Multiprocessing docs don't describe thread-safety https://bugs.python.org/issue40815 #40814: Update typing module documentation based on PEP 585 https://bugs.python.org/issue40814 #40808: test_venv fails with HOME=/ on AMD64 FreeBSD Non-Debug 3.x https://bugs.python.org/issue40808 #40807: CODEOP: Show warnings once during _maybe_compile https://bugs.python.org/issue40807 #40805: Can no longer patch flask.g https://bugs.python.org/issue40805 #40802: AbstractEventLoop.shutdown_default_executor breaks backwards c https://bugs.python.org/issue40802 #40800: asyncio.sleep(0) should "yield" back to the event loop, but it https://bugs.python.org/issue40800 #40797: multiprocessing.Semaphore has undocumented get_value() method https://bugs.python.org/issue40797 #40788: Build issue Solaris 10 Sparc https://bugs.python.org/issue40788 #40786: madvise should be accessible outside of mmap instance https://bugs.python.org/issue40786 #40775: Fix missing dot in sqlite3 Node type name https://bugs.python.org/issue40775 Most recent 15 issues waiting for review (15) ============================================= #40818: Run sys.__interactivehook__ for asyncio REPLs https://bugs.python.org/issue40818 #40816: Add missed AsyncContextDecorator to contextlib https://bugs.python.org/issue40816 #40811: Allow to create new Event Loops on Threads https://bugs.python.org/issue40811 #40810: sqlite3 test CheckTraceCallbackContent fails for sqlite v3.7.3 https://bugs.python.org/issue40810 #40807: CODEOP: Show warnings once during _maybe_compile https://bugs.python.org/issue40807 #40801: Expose PyFloat_AsDouble at Python level: operator.as_float? https://bugs.python.org/issue40801 #40799: Create Lib/_pydatetime.py file to optimize "import datetime" w https://bugs.python.org/issue40799 #40798: The deprecated-removed Sphinx extension need to change the err https://bugs.python.org/issue40798 #40791: hmac.compare_digest could try harder to be constant-time. https://bugs.python.org/issue40791 #40777: _datetimemodule.c:3328:16: error: initializer element is not c https://bugs.python.org/issue40777 #40775: Fix missing dot in sqlite3 Node type name https://bugs.python.org/issue40775 #40769: Pegen: cover extra surrounding parentheses for invalid annotat https://bugs.python.org/issue40769 #40767: Allow pure Wayland to get default XDG webbrowser https://bugs.python.org/issue40767 #40766: Add support for SQLITE_DIRECTONLY and SQLITE_INNOCUOUS for use https://bugs.python.org/issue40766 #40762: Writing bytes using CSV module results in b prefixed strings https://bugs.python.org/issue40762 Top 10 most discussed issues (10) ================================= #40762: Writing bytes using CSV module results in b prefixed strings https://bugs.python.org/issue40762 15 msgs #30064: BaseSelectorEventLoop.sock_{recv,sendall}() don't remove their https://bugs.python.org/issue30064 13 msgs #40794: dataclass signatures and docstrings w/future-annotations https://bugs.python.org/issue40794 11 msgs #38605: [typing] PEP 563: Postponed evaluation of annotations: enable https://bugs.python.org/issue38605 10 msgs #40701: tempfile mixes str and bytes in an inconsistent manner https://bugs.python.org/issue40701 10 msgs #40801: Expose PyFloat_AsDouble at Python level: operator.as_float? https://bugs.python.org/issue40801 9 msgs #40217: The garbage collector doesn't take in account that objects of https://bugs.python.org/issue40217 8 msgs #40748: Tutorial 4.7 More on Defining Functions missing screen prompts https://bugs.python.org/issue40748 8 msgs #2897: PyMemberDef missing in limited API / Deprecate structmember.h https://bugs.python.org/issue2897 7 msgs #40275: test.support has way too many imports https://bugs.python.org/issue40275 7 msgs Issues closed (78) ================== #13097: [easy C issue] ctypes: segfault with large number of callback https://bugs.python.org/issue13097 closed by vstinner #14562: urllib2 maybe blocks too long with small chunks https://bugs.python.org/issue14562 closed by benjamin.peterson #17050: argparse.REMAINDER doesn't work as first argument https://bugs.python.org/issue17050 closed by rhettinger #23082: pathlib relative_to() can give confusing error message https://bugs.python.org/issue23082 closed by steve.dower #23721: Set up a daily test coverage run https://bugs.python.org/issue23721 closed by brett.cannon #25247: Tkinter modules built successfully but removed because they co https://bugs.python.org/issue25247 closed by ned.deily #25920: PyOS_AfterFork should reset socketmodule's lock https://bugs.python.org/issue25920 closed by vstinner #26415: Excessive peak memory consumption by the Python parser https://bugs.python.org/issue26415 closed by pablogsal #29882: Add an efficient popcount method for integers https://bugs.python.org/issue29882 closed by mark.dickinson #30986: Add --include-py argument to Tools/msi/make_zip.py https://bugs.python.org/issue30986 closed by cheryl.sabella #32398: OSX C++ linking workaround in distutils breaks other packages https://bugs.python.org/issue32398 closed by cheryl.sabella #33111: Merely importing tkinter breaks parallel code (multiprocessing https://bugs.python.org/issue33111 closed by ned.deily #33388: Support PEP 566 metadata in distutils https://bugs.python.org/issue33388 closed by eric.araujo #34397: remove redundant overflow checks in tuple and list implementat https://bugs.python.org/issue34397 closed by cheryl.sabella #35545: asyncio.base_events.create_connection doesn't handle scoped IP https://bugs.python.org/issue35545 closed by cheryl.sabella #36290: _ast.ast_type_init does not handle args and kwargs correctly. https://bugs.python.org/issue36290 closed by pablogsal #37129: Add os.RWF_APPEND flag for os.pwritev https://bugs.python.org/issue37129 closed by vstinner #37218: Default hmac.new() digestmod has not been removed from documen https://bugs.python.org/issue37218 closed by cheryl.sabella #37973: improve docstrings of sys.float_info https://bugs.python.org/issue37973 closed by mark.dickinson #37999: No longer use implicit convertion to int with loss https://bugs.python.org/issue37999 closed by serhiy.storchaka #38580: select()'s documentation claims only sequences are accepted, b https://bugs.python.org/issue38580 closed by taleinat #39244: multiprocessing.get_all_start_methods() wrong default on macOS https://bugs.python.org/issue39244 closed by taleinat #39685: Python 3.8 regression Socket operation on non-socket https://bugs.python.org/issue39685 closed by christian.heimes #39686: add dump_json to ast module https://bugs.python.org/issue39686 closed by cheryl.sabella #40160: documentation example of os.walk should be less destructive https://bugs.python.org/issue40160 closed by serhiy.storchaka #40327: list(sys.modules.items()) can throw RuntimeError: dictionary c https://bugs.python.org/issue40327 closed by rhettinger #40367: ImportError: libffi.so.6 https://bugs.python.org/issue40367 closed by YoSTEALTH #40373: urlunparse does not escape slash (/) for http+unix:// in netlo https://bugs.python.org/issue40373 closed by taleinat #40439: Error in an external reference https://bugs.python.org/issue40439 closed by cheryl.sabella #40474: Code coverage report not entirely accurate https://bugs.python.org/issue40474 closed by brett.cannon #40552: Enhance for loop and copy example in tutorial https://bugs.python.org/issue40552 closed by nanjekyejoannah #40558: update CONTRIBUTING.rst docs https://bugs.python.org/issue40558 closed by zach.ware #40586: Pydoc should support https for hyperlinks. https://bugs.python.org/issue40586 closed by cheryl.sabella #40611: Add MAP_POPULATE to the mmap library https://bugs.python.org/issue40611 closed by vstinner #40646: Builtins in doc show signature in documentation https://bugs.python.org/issue40646 closed by terry.reedy #40654: shutil.copyfile mutates symlink for absolute path https://bugs.python.org/issue40654 closed by steve.dower #40663: Wrong generated annotation on subscripting https://bugs.python.org/issue40663 closed by pablogsal #40667: [Windows] Add global python and python3 commands https://bugs.python.org/issue40667 closed by steve.dower #40678: Full list of Python lexical rules https://bugs.python.org/issue40678 closed by cool-RR #40679: show class name in method invocation TypeError https://bugs.python.org/issue40679 closed by chris.jerdonek #40688: PEG Generator: Fix scripts to always use the correct parser https://bugs.python.org/issue40688 closed by lys.nikolaou #40719: Add pt-br to the language switcher at the Python 3.6 and 2.7 d https://bugs.python.org/issue40719 closed by rffontenelle #40722: test_ttk_guionly times out on Ubuntu CI https://bugs.python.org/issue40722 closed by terry.reedy #40730: Odd sentence in 3.9 What's New https://bugs.python.org/issue40730 closed by eric.smith #40731: CWI url's protocol on LICENSE file from http to https https://bugs.python.org/issue40731 closed by gvanrossum #40732: New realpath breaks setuptools_scm https://bugs.python.org/issue40732 closed by jaraco #40737: Fix possible reference leak for sqlite3 initialization https://bugs.python.org/issue40737 closed by corona10 #40738: backspace character \b not processed by IDLE https://bugs.python.org/issue40738 closed by terry.reedy #40740: Missing api-ms-win-core-path-l1-1.0.dll for python-3.9.0b1-amd https://bugs.python.org/issue40740 closed by steve.dower #40750: Support -d flag in the new parser https://bugs.python.org/issue40750 closed by pablogsal #40751: command 'elif' does not work https://bugs.python.org/issue40751 closed by terry.reedy #40752: Implement PurePath.__len__ https://bugs.python.org/issue40752 closed by serhiy.storchaka #40753: Remove Python 2 compatibility code from pathlib https://bugs.python.org/issue40753 closed by brett.cannon #40755: Add missing multiset predicates to collections.Counter https://bugs.python.org/issue40755 closed by rhettinger #40760: Dictionary comprehension using older division behavior https://bugs.python.org/issue40760 closed by Amol Sharma #40761: unittest.TestCase.assertTrue return True even if the expr is F https://bugs.python.org/issue40761 closed by zach.ware #40764: Conflation of Counter with Multiset https://bugs.python.org/issue40764 closed by rhettinger #40765: clear screen in idle https://bugs.python.org/issue40765 closed by terry.reedy #40768: pyaudio https://bugs.python.org/issue40768 closed by SilentGhost #40774: "Important" block in documentation of asyncio.create_subproces https://bugs.python.org/issue40774 closed by benjamin.peterson #40776: Python 3.7.6 installation issue on mac os x 10.6.8 https://bugs.python.org/issue40776 closed by ned.deily #40778: Updating Py_REFCNT and Py_SIZE to use _PyObject_CAST_CONS https://bugs.python.org/issue40778 closed by corona10 #40779: incorrect end column for single argument generator function ca https://bugs.python.org/issue40779 closed by pablogsal #40780: float.__format__() handles trailing zeros inconsistently in � https://bugs.python.org/issue40780 closed by mark.dickinson #40781: Remove sys._debugmallocstats() function and PYTHONMALLOCSTATS https://bugs.python.org/issue40781 closed by vstinner #40783: test_interpreters test_interpreters leaked [216, 216, 216] ref https://bugs.python.org/issue40783 closed by pablogsal #40784: test_sqlite: CheckFuncDeterministic() fails with SQLite 3.32 https://bugs.python.org/issue40784 closed by berker.peksag #40787: Mysql + unittest crash https://bugs.python.org/issue40787 closed by lgerosa #40789: C-level destructor in PySide2 breaks gen_send_ex, which assume https://bugs.python.org/issue40789 closed by njs #40790: Python should enable computed gotos on Mac by default https://bugs.python.org/issue40790 closed by benjamin.peterson #40792: Make PyNumber_Index() always returning an exact int instance https://bugs.python.org/issue40792 closed by serhiy.storchaka #40793: print() performance problem with very large numbers https://bugs.python.org/issue40793 closed by mark.dickinson #40795: ctypes: PyErr_WriteUnraisable() called with no exception set o https://bugs.python.org/issue40795 closed by vstinner #40796: dataclasses.make_dataclass: Exception when called with differe https://bugs.python.org/issue40796 closed by Darrick Yee #40803: Unable to execute python.exe from zip in wine https://bugs.python.org/issue40803 closed by clanmills #40806: itertools.product not lazy https://bugs.python.org/issue40806 closed by rhettinger #40809: list.Count() isn't working as expected for the series of same https://bugs.python.org/issue40809 closed by steven.daprano #40812: _tkinter build failed when install Python-3.6.10 https://bugs.python.org/issue40812 closed by ned.deily

2 1

PEP 618: Add Optional Length-Checking To zip
by Brandt Bucher 02 Jun '20

02 Jun '20

I have pushed a second draft of PEP 618: https://www.python.org/dev/peps/pep-0618 Please let me know what you think – I'd love to hear any new feedback that hasn't yet been addressed in the PEP! Brandt

23 60

Repr: where to place the address and additional info?
by Serhiy Storchaka 01 Jun '20

01 Jun '20

The default repr of Python object is formatted using the following pattern: <{typename} object at {address:#x}> And many custom reprs use similar patterns, but add some additional type specific information. The type name first, followed by details and address. All is surrounded by angle quotes. The question is in what order to show address and other details? Should the address be at rear or in the middle? <{typename} {details} at {address:#x}> <{typename} at {address:#x} {details}> There are examples of both ways in the stdlib. I am going to add new custom reprs [1] and need to know what pattern looks better. Also, is "object" mandatory after the type name? <{typename} object {details} at {address:#x}> <{typename} object at {address:#x} {details}> [1] https://bugs.python.org/issue24391

5 4