Mailman 3 March 2021 - Python-Dev

Summary of Python tracker Issues
by Python tracker 26 Mar '21

26 Mar '21

ACTIVITY SUMMARY (2021-03-19 - 2021-03-26) 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 7498 (+17) closed 47871 (+58) total 55369 (+75) Open issues with patches: 2984 Issues opened (54) ================== #33164: Blake 2 module update https://bugs.python.org/issue33164 reopened by christian.heimes #42129: Support resources in namespace packages https://bugs.python.org/issue42129 reopened by vstinner #43560: Modify SAX/expat parsing to avoid fragmentation of already-tin https://bugs.python.org/issue43560 opened by ridgerat1611 #43561: Modify XML parsing library descriptions to forewarn of content https://bugs.python.org/issue43561 opened by ridgerat1611 #43562: test_ssl.NetworkedTests.test_timeout_connect_ex fails if netwo https://bugs.python.org/issue43562 opened by carljm #43563: Use dedicated opcodes to speed up calls/attribute lookups with https://bugs.python.org/issue43563 opened by v2m #43564: ftp tests in test_urllib2net fail instead of skipping on unrea https://bugs.python.org/issue43564 opened by carljm #43565: PyUnicode_KIND macro does not has specified return type https://bugs.python.org/issue43565 opened by maxbachmann #43567: regen.vcxproj cannot regenerate some necessary files https://bugs.python.org/issue43567 opened by pjx206 #43568: Drop support for Mac OS X < 10.3 module linking https://bugs.python.org/issue43568 opened by jmr #43570: pyspecific.py > AuditEvent mess with translations https://bugs.python.org/issue43570 opened by mdk #43574: Regression in overallocation for literal list initialization i https://bugs.python.org/issue43574 opened by Chad.Netzer #43576: python3.6.4 os.environ error when write chinese to file https://bugs.python.org/issue43576 opened by rushant #43578: With asyncio subprocess, send_signal() and the child process w https://bugs.python.org/issue43578 opened by lincheney #43579: Leak in asyncio.selector_events._SelectorSocketTransport https://bugs.python.org/issue43579 opened by begnac #43582: SSLContext.sni_callback docs inaccurately describe available h https://bugs.python.org/issue43582 opened by theandrew168 #43583: make test failures, 2 tests failed: test_embed test_tabnan https://bugs.python.org/issue43583 opened by Pattesvador #43584: Doc description of str.title() upper case vs. title case. https://bugs.python.org/issue43584 opened by grant.b.edwards #43585: perf_counter() returns computers uptime https://bugs.python.org/issue43585 opened by txhx38 #43588: [Subinterpreters]: use static variable under building Python w https://bugs.python.org/issue43588 opened by JunyiXie #43590: Collapse sidebar issue on https://docs.python.org/3/ https://bugs.python.org/issue43590 opened by lucijan345 #43592: test_importlib: test_multiprocessing_pool_circular_import() fa https://bugs.python.org/issue43592 opened by vstinner #43593: pymalloc is not aware of Memory Tagging Extension (MTE) and cr https://bugs.python.org/issue43593 opened by ggardet #43594: A metaclass that inherits both `ABC` and `ABCMeta` breaks on https://bugs.python.org/issue43594 opened by erezinman #43595: Can not add a metclass that inherits both ABCMeta & ABC to a U https://bugs.python.org/issue43595 opened by erezinman #43596: change assertRaises message when wrong exception is raised https://bugs.python.org/issue43596 opened by rsk2 #43597: robotparser should support specifying SSL context https://bugs.python.org/issue43597 opened by Tchinmai7 #43598: test_subprocess logs multiple ResourceWarning warnings https://bugs.python.org/issue43598 opened by vstinner #43599: Setting long domain of locale.dgettext() crashes Python interp https://bugs.python.org/issue43599 opened by xxm #43600: IDLE: fix highlight locationfor f-string field errors https://bugs.python.org/issue43600 opened by terry.reedy #43602: Include Decimal's in numbers.Real https://bugs.python.org/issue43602 opened by Sergey.Kirpichev #43604: Fix tempfile.mktemp() https://bugs.python.org/issue43604 opened by David Luke�� #43605: Issue of scopes unclear in documentation, or wrongly implement https://bugs.python.org/issue43605 opened by bruno.loff #43606: PySimpleGUI: initial huge window & no widgets visible https://bugs.python.org/issue43606 opened by bennett78 #43607: urllib's request.pathname2url not compatible with extended-len https://bugs.python.org/issue43607 opened by levineds #43608: `bytes_concat` and Buffer cleanup https://bugs.python.org/issue43608 opened by seberg #43609: ast.unparse-ing a FunctionType gives ambiguous result https://bugs.python.org/issue43609 opened by cleoold #43610: Ctrl C makes interpreter exit https://bugs.python.org/issue43610 opened by xxm #43611: Function tcflow() in module termios can not be interupted when https://bugs.python.org/issue43611 opened by xxm #43612: zlib.compress should have a wbits argument https://bugs.python.org/issue43612 opened by rhpvorderman #43613: gzip.compress and gzip.decompress are sub-optimally implemente https://bugs.python.org/issue43613 opened by rhpvorderman #43614: Search is not beginner friendly https://bugs.python.org/issue43614 opened by anthony-flury #43617: Missing definition in configure.ac causing autoreconf to creat https://bugs.python.org/issue43617 opened by congma #43619: convenience of using create_datagram_endpoint (and friends) https://bugs.python.org/issue43619 opened by Roman.Valov #43620: os.path.join does not use os.sep as documentation claims https://bugs.python.org/issue43620 opened by jpsutton #43621: gzip._GzipReader should only throw BadGzipFile errors https://bugs.python.org/issue43621 opened by rhpvorderman #43622: TLS 1.3, client polling returns event without data https://bugs.python.org/issue43622 opened by gchauvel #43624: Add underscore as a decimal separator for string formatting https://bugs.python.org/issue43624 opened by Terry Davis #43625: CSV has_headers heuristic could be improved https://bugs.python.org/issue43625 opened by ejacq #43627: What are the requirements for a test_sundry-testable script in https://bugs.python.org/issue43627 opened by skip.montanaro #43629: fix _PyRun_SimpleFileObject create __main__ module and cache. https://bugs.python.org/issue43629 opened by JunyiXie #43630: unittest use dir(module) to load test cases. Run unittest file https://bugs.python.org/issue43630 opened by JunyiXie #43631: Update to OpenSSL 1.1.1k https://bugs.python.org/issue43631 opened by christian.heimes #43633: Improve the textual representation of IPv4-mapped IPv6 address https://bugs.python.org/issue43633 opened by maxmouchet Most recent 15 issues with no replies (15) ========================================== #43633: Improve the textual representation of IPv4-mapped IPv6 address https://bugs.python.org/issue43633 #43631: Update to OpenSSL 1.1.1k https://bugs.python.org/issue43631 #43630: unittest use dir(module) to load test cases. Run unittest file https://bugs.python.org/issue43630 #43629: fix _PyRun_SimpleFileObject create __main__ module and cache. https://bugs.python.org/issue43629 #43627: What are the requirements for a test_sundry-testable script in https://bugs.python.org/issue43627 #43621: gzip._GzipReader should only throw BadGzipFile errors https://bugs.python.org/issue43621 #43619: convenience of using create_datagram_endpoint (and friends) https://bugs.python.org/issue43619 #43612: zlib.compress should have a wbits argument https://bugs.python.org/issue43612 #43611: Function tcflow() in module termios can not be interupted when https://bugs.python.org/issue43611 #43608: `bytes_concat` and Buffer cleanup https://bugs.python.org/issue43608 #43600: IDLE: fix highlight locationfor f-string field errors https://bugs.python.org/issue43600 #43599: Setting long domain of locale.dgettext() crashes Python interp https://bugs.python.org/issue43599 #43598: test_subprocess logs multiple ResourceWarning warnings https://bugs.python.org/issue43598 #43597: robotparser should support specifying SSL context https://bugs.python.org/issue43597 #43596: change assertRaises message when wrong exception is raised https://bugs.python.org/issue43596 Most recent 15 issues waiting for review (15) ============================================= #43631: Update to OpenSSL 1.1.1k https://bugs.python.org/issue43631 #43629: fix _PyRun_SimpleFileObject create __main__ module and cache. https://bugs.python.org/issue43629 #43625: CSV has_headers heuristic could be improved https://bugs.python.org/issue43625 #43620: os.path.join does not use os.sep as documentation claims https://bugs.python.org/issue43620 #43617: Missing definition in configure.ac causing autoreconf to creat https://bugs.python.org/issue43617 #43612: zlib.compress should have a wbits argument https://bugs.python.org/issue43612 #43597: robotparser should support specifying SSL context https://bugs.python.org/issue43597 #43588: [Subinterpreters]: use static variable under building Python w https://bugs.python.org/issue43588 #43574: Regression in overallocation for literal list initialization i https://bugs.python.org/issue43574 #43570: pyspecific.py > AuditEvent mess with translations https://bugs.python.org/issue43570 #43568: Drop support for Mac OS X < 10.3 module linking https://bugs.python.org/issue43568 #43564: ftp tests in test_urllib2net fail instead of skipping on unrea https://bugs.python.org/issue43564 #43563: Use dedicated opcodes to speed up calls/attribute lookups with https://bugs.python.org/issue43563 #43562: test_ssl.NetworkedTests.test_timeout_connect_ex fails if netwo https://bugs.python.org/issue43562 #43556: fix attr names for ast.expr and ast.stmt https://bugs.python.org/issue43556 Top 10 most discussed issues (10) ================================= #32592: Drop support of Windows Vista and Windows 7 https://bugs.python.org/issue32592 10 msgs #43511: tkinter with Tk 8.6.11 is slow on macOS https://bugs.python.org/issue43511 10 msgs #43620: os.path.join does not use os.sep as documentation claims https://bugs.python.org/issue43620 10 msgs #43588: [Subinterpreters]: use static variable under building Python w https://bugs.python.org/issue43588 9 msgs #43547: support ZIP files with zeroed out fields (e.g. for reproducibl https://bugs.python.org/issue43547 8 msgs #43582: SSLContext.sni_callback docs inaccurately describe available h https://bugs.python.org/issue43582 7 msgs #43606: PySimpleGUI: initial huge window & no widgets visible https://bugs.python.org/issue43606 7 msgs #43602: Include Decimal's in numbers.Real https://bugs.python.org/issue43602 6 msgs #43624: Add underscore as a decimal separator for string formatting https://bugs.python.org/issue43624 6 msgs #40521: [subinterpreters] Make free lists and unicode caches per-inter https://bugs.python.org/issue40521 5 msgs Issues closed (59) ================== #4198: os.path.normcase gets fooled on windows with mapped linux netw https://bugs.python.org/issue4198 closed by eryksun #12762: OSError msg should display symbolic error codes https://bugs.python.org/issue12762 closed by ZackerySpytz #14189: C API documentation must document if returned object is a borr https://bugs.python.org/issue14189 closed by iritkatriel #20608: 'SyntaxError: invalid token' is unfriendly https://bugs.python.org/issue20608 closed by terry.reedy #24605: segmentation fault at asciilib_split_char.lto_priv https://bugs.python.org/issue24605 closed by iritkatriel #28168: Use _winapi.WaitForMultipleObjects in Popen.wait() https://bugs.python.org/issue28168 closed by eryksun #28188: os.putenv should support bytes arguments on Windows https://bugs.python.org/issue28188 closed by eryksun #29996: Use terminal width by default in pprint https://bugs.python.org/issue29996 closed by serhiy.storchaka #31861: add aiter() and anext() functions https://bugs.python.org/issue31861 closed by gvanrossum #36860: Inconsistent/Undocumented behavior with pathlib resolve and ab https://bugs.python.org/issue36860 closed by eryksun #37894: [win] shutil.which can not find the path if 'cmd' include dire https://bugs.python.org/issue37894 closed by eryksun #39418: str.strip() should have a means of adding to the default behav https://bugs.python.org/issue39418 closed by rhettinger #39920: os.stat() and os.lstat() fail with Windows device paths https://bugs.python.org/issue39920 closed by eryksun #40813: Line number of SyntaxError https://bugs.python.org/issue40813 closed by terry.reedy #41064: Specialise syntax error of **dict in f-string field https://bugs.python.org/issue41064 closed by pablogsal #41551: test.support has way too many imports in libregrtest https://bugs.python.org/issue41551 closed by shihai1991 #41718: test.regrtest has way too many imports https://bugs.python.org/issue41718 closed by vstinner #42137: Prefer using __spec__ over module_repr() for ModuleType.__repr https://bugs.python.org/issue42137 closed by brett.cannon #42914: pprint numbers with underscore https://bugs.python.org/issue42914 closed by gregory.p.smith #42964: Draft PEP blob etc https://bugs.python.org/issue42964 closed by iritkatriel #43060: Convert _decimal C API from pointer array to struct https://bugs.python.org/issue43060 closed by erlendaasland #43244: Move PyArena C API to the internal C API https://bugs.python.org/issue43244 closed by vstinner #43416: Add README files in Include/cpython and Include/internal https://bugs.python.org/issue43416 closed by vstinner #43420: Optimize rational arithmetics https://bugs.python.org/issue43420 closed by tim.peters #43422: Revert _decimal C API changes https://bugs.python.org/issue43422 closed by pitrou #43452: Microoptimize PyType_Lookup for cache hits https://bugs.python.org/issue43452 closed by pablogsal #43481: PyEval_EvalCode() namespace issue not observed in Python 2.7. https://bugs.python.org/issue43481 closed by terry.reedy #43487: Rename __unicode__ methods to __str__ in 2to3 conversion https://bugs.python.org/issue43487 closed by gregory.p.smith #43494: Minor changes to Objects/lnotab_notes.txt https://bugs.python.org/issue43494 closed by skip.montanaro #43502: [C-API] Convert obvious unsafe macros to static inline functio https://bugs.python.org/issue43502 closed by erlendaasland #43517: Fix false positives in circular import detection with from-imp https://bugs.python.org/issue43517 closed by pitrou #43520: Make Fraction(string) handle non-ascii slashes https://bugs.python.org/issue43520 closed by gregory.p.smith #43535: Make str.join auto-convert inputs to strings. https://bugs.python.org/issue43535 closed by rhettinger #43542: Add image/heif(heic) to list of media types in mimetypes.py https://bugs.python.org/issue43542 closed by gregory.p.smith #43551: [subinterpreters] Fix PyImport_Import() for subinterpreters https://bugs.python.org/issue43551 closed by vstinner #43555: Location of SyntaxError with new parser missing (after continu https://bugs.python.org/issue43555 closed by pablogsal #43559: ctypes: Heap Pointer is damaged between C and Python https://bugs.python.org/issue43559 closed by canberk.sonmez.409 #43566: Docs say int('010', 0) is not legal, but it is https://bugs.python.org/issue43566 closed by rhettinger #43569: test_importlib failed on installed Python https://bugs.python.org/issue43569 closed by pitrou #43571: Add option to create MPTCP sockets https://bugs.python.org/issue43571 closed by gregory.p.smith #43572: "Too many open files" on macOS buildbot https://bugs.python.org/issue43572 closed by pitrou #43573: [types] Document __spec__ for types.ModuleType https://bugs.python.org/issue43573 closed by brett.cannon #43575: map() instantiation time reducing by using PEP 590 vectorcall https://bugs.python.org/issue43575 closed by corona10 #43577: Deadlock when using SSLContext._msg_callback and SSLContext.sn https://bugs.python.org/issue43577 closed by christian.heimes #43580: A Question about List Slice https://bugs.python.org/issue43580 closed by mark.dickinson #43581: array assignment error https://bugs.python.org/issue43581 closed by rhettinger #43586: sys.path is weird in Windows 10. https://bugs.python.org/issue43586 closed by RyuSh1n #43587: Long string arguments cause nis.map() segfault https://bugs.python.org/issue43587 closed by vstinner #43589: Using defaultdict as kwarg to function reuses same dictionary https://bugs.python.org/issue43589 closed by steven.daprano #43591: Parser aborts on incomplete/incorrect unicode literals in inte https://bugs.python.org/issue43591 closed by pablogsal #43601: Tools/c-analyzer/check-c-globals.py run throw exception err https://bugs.python.org/issue43601 closed by JunyiXie #43603: spam https://bugs.python.org/issue43603 closed by mark.dickinson #43615: [PATCH] Properly implement Py_UNREACHABLE macro using autoconf https://bugs.python.org/issue43615 closed by congma #43616: random.shuffle() crashes with Unhandled exception https://bugs.python.org/issue43616 closed by scoder #43618: random.shuffle loses most of the elements https://bugs.python.org/issue43618 closed by scoder #43623: nouveaut�� 2021 https://bugs.python.org/issue43623 closed by vstinner #43626: SIGSEV in PyErr_SetObject https://bugs.python.org/issue43626 closed by amacias #43628: Incorrect argument errors for random.getstate() https://bugs.python.org/issue43628 closed by rhettinger #43632: an error in the documentation of descriptor https://bugs.python.org/issue43632 closed by rhettinger

1 0

Alternative syntax for Python's lambda
by Dan Stromberg 26 Mar '21

26 Mar '21

I posted this to LWN, and thought I'd share it here too: I'm opposed to terse-ifying lambda in Python. Lambda is rarely useful in Python - you're almost always better off using a generator expression, a list comprehension, or something from the operator module. And lambdas tend to give rise to the software development equivalent of a runon sentence. Naming a function in those rare cases that you genuinely need something custom really isn't the end of the world, and is more readable anyway.

3 3

failing doc test
by Ethan Furman 26 Mar '21

26 Mar '21

I have this documentation: -------------------------------------------------------------------------------- .. class:: FlagBoundary *FlagBoundary* controls how out-of-range values are handled in *Flag* and its subclasses. .. attribute:: STRICT Out-of-range values cause a :exc:`ValueError` to be raised. This is the default for :class:`Flag`:: >>> from enum import STRICT >>> class StrictFlag(Flag, boundary=STRICT): ... RED = auto() ... GREEN = auto() ... BLUE = auto() >>> StrictFlag(2**2 + 2**4) Traceback (most recent call last): ... ValueError: StrictFlag: invalid value: 20 given 0b0 10100 allowed 0b0 00111 .. attribute:: CONFORM Out-of-range values have invalid values removed, leaving a valid *Flag* value:: >>> from enum import CONFORM >>> class ConformFlag(Flag, boundary=CONFORM): ... RED = auto() ... GREEN = auto() ... BLUE = auto() >>> ConformFlag(2**2 + 2**4) ConformFlag.BLUE .. attribute:: EJECT Out-of-range values lose their *Flag* membership and revert to :class:`int`. This is the default for :class:`IntFlag`:: >>> from enum import EJECT >>> class EjectFlag(Flag, boundary=EJECT): ... RED = auto() ... GREEN = auto() ... BLUE = auto() >>> EjectFlag(2**2 + 2**4) 20 .. attribute:: KEEP Out-of-range values are kept, and the *Flag* membership is kept. This is used for some stdlib flags: >>> from enum import KEEP >>> class KeepFlag(Flag, boundary=KEEP): ... RED = auto() ... GREEN = auto() ... BLUE = auto() >>> KeepFlag(2**2 + 2**4) KeepFlag.BLUE|0x10 -------------------------------------------------------------------------------- and I'm getting this error: -------------------------------------------------------------------------------- Warning, treated as error: ********************************************************************** File "library/enum.rst", line ?, in default Failed example: class KeepFlag(Flag, boundary=KEEP): RED = auto() GREEN = auto() BLUE = auto() Exception raised: Traceback (most recent call last): File "/home/travis/build/python/cpython/Lib/doctest.py", line 1337, in __run exec(compile(example.source, filename, "single", File "<doctest default[1]>", line 1, in <module> class KeepFlag(Flag, boundary=KEEP): NameError: name 'Flag' is not defined -------------------------------------------------------------------------------- `Flag` has been imported before, the first three examples using `Flag` pass... any ideas on why the fourth test cannot find `Flag`? -- ~Ethan~

1 0

New public C API functions must not steal references or return borrowed references
by Victor Stinner 26 Mar '21

26 Mar '21

Hi, A new Include/README.rst file was just added to document the 3 C API provided by CPython: * Include/: Limited C API * Include/cpython/: CPython implementation details * Include/internal/: The internal API I would like to note that *new* public C API functions must no longer steal references or return borrowed references. Don't worry, there is no plan to deprecate or remove existing functions which do that, like PyModule_AddObject() (streal a reference) or PyDict_GetItem() (return a borrowed reference). The policy is only to *add* new functions. IMO for the *internal* C API, it's fine to continue doing that for best performances. Moreover, the limited C API must not expose "implementation details". For example, structure members must not be accessed directly, because most structures are excluded from the limited C API. A function call hiding implementation details is usually better. Here is a copy of the current Include/README.rst file: The Python C API ================ The C API is divided into three sections: 1. ``Include/`` 2. ``Include/cpython/`` 3. ``Include/internal/`` Include: Limited API ==================== ``Include/``, excluding the ``cpython`` and ``internal`` subdirectories, contains the public Limited API (Application Programming Interface). The Limited API is a subset of the C API, designed to guarantee ABI stability across Python 3 versions, and is defined in :pep:`384`. Guidelines for expanding the Limited API: - Functions *must not* steal references - Functions *must not* return borrowed references - Functions returning references *must* return a strong reference - Macros should not expose implementation details - Please start a public discussion before expanding the API - Functions or macros with a ``_Py`` prefix do not belong in ``Include/``. It is possible to add a function or macro to the Limited API from a given Python version. For example, to add a function to the Limited API from Python 3.10 and onwards, wrap it with ``#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x030A0000``. Include/cpython: CPython implementation details =============================================== ``Include/cpython/`` contains the public API that is excluded from the Limited API and the Stable ABI. Guidelines for expanding the public API: - Functions *must not* steal references - Functions *must not* return borrowed references - Functions returning references *must* return a strong reference Include/internal: The internal API ================================== With PyAPI_FUNC or PyAPI_DATA ----------------------------- Functions or structures in ``Include/internal/`` defined with ``PyAPI_FUNC`` or ``PyAPI_DATA`` are internal functions which are exposed only for specific use cases like debuggers and profilers. With the extern keyword ----------------------- Functions in ``Include/internal/`` defined with the ``extern`` keyword *must not and can not* be used outside the CPython code base. Only built-in stdlib extensions (built with the ``Py_BUILD_CORE_BUILTIN`` macro defined) can use such functions. When in doubt, new internal C functions should be defined in ``Include/internal`` using the ``extern`` keyword. Victor -- Night gathers, and now my watch begins. It shall not end until my death.

7 7

OpenSSL 1.1.1k CVE fixes
by Christian Heimes 25 Mar '21

25 Mar '21

Hi, OpenSSL released 1.1.1k today with two high severity CVEs, https://www.openssl.org/news/vulnerabilities.html The ssl module is not affected by CVE-2021-3450 in its default configuration. Python does not set X509_V_FLAG_X509_STRICT on SSLContext. Only applications that that use ssl.VERIFY_X509_STRICT verify flag are affected. It looks like Python's ssl module is vulnerable to CVE-2021-3449. The crash does not affect pip, requests, or any other client-side socket. Only server-side SSL/TLS sockets are vulnerable (ssl.PROTOCOL_TLS_SERVER and server_side=True). I haven't had time to reproduce and verify any of the CVE bugs yet. That means I'm not entirely sure how the CVEs affect CPython. I strongly recommend that you update OpenSSL through your vendor and restart your services. If you cannot update OpenSSL (e.g. for Python.org installers), then you can apply workarounds: To disable X509_V_FLAG_X509_STRICT flag either remove any lines that set the flag or unset the flag with: ctx.verify_flags &= ~ssl.VERIFY_X509_STRICT (That's bitwise AND and unary bitwise invert operator) To work around CVE-2021-3449 either set disable TLS 1.0, 1,1, and 1.2 with ctx.minimum_version = ssl.TLSVersion.TLSv1_3 or disable renegotiation with ctx.options |= ssl.OP_NO_RENEGOTIATION NOTE: Renegotiation is required for TLS 1.2 rekeying, optional TLS client cert authention with TLS 1.2 and possible other features. TLS 1.3 is not supported by older clients and servers. Christian

1 0

Re: Steering Council reply regarding conduct (was Re: Steering Council update for February)
by Brian Herman 25 Mar '21

25 Mar '21

Maybe we can change the discussion to something more productive like the python module system or anything else?

1 0

Steering Council reply regarding conduct (was Re: Steering Council update for February)
by Python Steering Council 24 Mar '21

24 Mar '21

From Thomas Wouters, on behalf of and with full support of the Python Steering Council: I’ll post a separate reply about the merits of the decision, but we have to talk about this post from Steven D’Aprano in particular. Steven, this reply -- its tone and its message -- are completely unacceptable. It is offensive, dismissive and insulting. It’s a bad faith argument ridiculing a good faith effort. It is particularly insulting that you take the time to draw false equivalences to arguments that weren’t made on this list, and that you’re assuming motivation and ridiculing it, without taking the time to engage in the actual arguments. There are plenty of sources online that you could’ve used to learn more, or you could have just asked in this thread. Instead, you posted this sarcastic, denigrating, mocking reply. Yours isn’t the only post that crosses the line in this thread, but it is the worst. It is an example of the kind of discourse that is too common and that reflects very badly on python-dev. It creates an atmosphere of disrespect and abuse, and actively scares away both experienced contributors and new ones. This is not conjecture; I and others on the SC have heard from more than a dozen people that this is exactly the case. This is not acceptable. It has to stop. The PSF Code of Conduct WG has sent the SC a recommendation on this issue. It recommended a temporary ban from python-dev for Steven, and a warning for someone else. While the SC believes a temporary ban would certainly be a reasonable action, we decided to instead make this public statement, as a warning to everyone. The SC wants to be clear that this statement applies to everyone who has made uncivil and inflammatory posts. This tone is not acceptable from anyone. The SC wants to make this very clear: this is a final warning to remind everyone that this behaviour will result in strong measures, including bans and ejections. If you want to argue something, do so on the merits, in good faith, and with empathy and consideration. If you can only ridicule someone, their motivation or their lived experience, please keep it to yourself. > On Tue, Mar 09, 2021 at 08:27:19PM +0000, Pablo Galindo Salgado wrote: > > > The Steering Council discussed renaming the master branch to main and > > the consensus was that we should do that. > > And about time too. Can we now tackle some of the equally pressing use > of offensive terms that are common in the Python community, starting > with the name of the language itself? > > Pythons are snakes, which is triggering to people with a phobia of > snakes. About one third of all people, or more than two *billion* > people, suffer from some level of phobia towards snakes. > > The popular "nose" testing framework is a blatant antisemetic and > neo-nazi dog whistle. > > "bool" is named after George Boole, a problematic white man who > appropriated the culture of both the Middle East and East Asia. > > "dict" is confusable with, and is often abbreviated to, an offensive > word. And don't even get me started with the obvious sexism of "tty". > > Unicode is racist because it has unified Chinese, Japanese and Korean > characters as if they were the same thing, and relegates non-Western > languages to second class status: > > https://modelviewculture.com/pieces/i-can-text-you-a-pile-of-poo-but-i-cant… > > It also includes a teddy bear symbol, which is named after notorious > racist and imperialist Theodore Roosevelt, and no less than *six* > swastika symbols. Also the Cross of Jerusalem, the symbol of such openly > fascist groups as the Federal State of Austria during the 1930s and the > Russian far-right extremist organisation the People's National Party. > > It even has a symbol for chains, which is associated even more closely > with slavery than "master". > > Speaking of slavery, in the standard library we have ChainMap and > itertools.chain. > > We have the ableist "runpy", and in the random module a function named > after Vilfredo Pareto, who supported the rule of fascist dictator Benito > Mussolini. There are the token and tokenize modules, which are offensive > for their association with both sexist and racist views. > > The tarfile module is associated with the racist Uncle Remus stories, > and a derogatory term for US Blacks. > > https://www.washingtonpost.com/blogs/compost/post/doug-lamborns-tar-baby-qu… > > The textwrap module uses a derogatory racist and fatphobic term dozens > of times. > > http://rsdb.org/slur/chunk > > Each of these issues are just as important as the "master" issue. > > > -- > Steve

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Merge request reminder.
by Alfred Perlstein 24 Mar '21

24 Mar '21

Hello, a while back we hit a bug with doctest and mock.call that confused a few people on our team for a while. I dug into fixing it and made doctest more defensive around un-unwrappable calls. I submitted a PR (https://github.com/python/cpython/pull/22981) for an Issue (https://bugs.python.org/issue35753) back in October 25, 2020 which got some review, and then have not heard for several months. I am wondering if it can be reviewed and feedback given on a way forward. Thank you, -Alfred

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typo in PEP 636
by codeofdusk＠gmail.com 23 Mar '21

23 Mar '21

Hello, The GUI section of PEP 636 reads: "It will also requires that the event has a position attribute that matches the (x, y) pattern". It should read "It will also require that the event has a position attribute that matches the (x, y) pattern". Thanks, Bill

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Tests now start with only 131 imported modules, instead of 233
by Victor Stinner 23 Mar '21

23 Mar '21

Hi, tl;dr Tests of the Python Test Suite now start with 131 imported modules, instead of 233. For example, asyncio, logging, multiprocessing and warnings are no longer imported by default. -- The Python test suite is run by a custom test runner called "libregrtest" (test.libregrtest). It can detect reference leaks, write the output as JUnit XML, run tests in parallel with multiple processes, etc. Tests are written with test.support which is a collection of helper functions. Over the years, test.support got more and more functions, and libregrtest got more and more features. The problem is that they import more and more modules. For example, "import test.support" imports 173 modules in Python 3.8! $ python3.8 >>> import sys, sys >>> before=set(sys.modules); import test.support; after=set(sys.modules) >>> len(after - before) 173 In these imports, you can find some "heavy" modules like asyncio and multiprocessing. Moreover, some modules have "side effects" on import. For example, "import logging" registers an "at fork" callback. In April 2020, I worked with Hai Shi on Python 3.10 in bpo-40275 to reduce the number of test.support imports from 171 to 25! test.support was splitted into multiple sub-modules: - bytecode_helper - hashlib_helper - import_helper - logging_helper - os_helper - script_helper - socket_helper - threading_helper - warnings_helper I continued the work in bpo-41718 to reduce the number of libregrtest imports, since libregrtest also imported many modules. A dummy test which does nothing in the master branch now only has 131 modules in sys.modules, whereas in Python 3.9 it has 233 (+102) modules! For example, asyncio, logging, multiprocessing and warnings are no longer imported by default. "import test.support" is now faster. master branch compared to Python 3.8 using ./python -c 'import test.support' command and Python built in release mode: [py38] 85.7 ms +- 6.8 ms -> [master] 32.4 ms +- 1.3 ms: 2.64x faster More realistic command running a single test method: ./python -m test test_os -m test_access [py38] 136 ms +- 5 ms -> [master] 97.8 ms +- 2.4 ms: 1.39x faster The only annoying point is that splitting test.support into sub-modules was not backported to Python 3.8 and 3.9, and so it will make backports a little bit more annoying. Sorry about that! -- If you know that two modules should be tested together, please write a dedicated test for that ;-) Victor -- Night gathers, and now my watch begins. It shall not end until my death.

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Python-Dev March 2021