Python-Dev January 2020

python-dev@python.org

75 participants
51 discussions

by Benjamin Peterson

Hi all, It's finally time to schedule the last releases in Python 2's life. There will be two more releases of Python 2.7: Python 2.7.17 and Python 2.7.18. Python 2.7.17 release candidate 1 will happen on October 5th followed by the final release on October 19th. I'm going to time Python 2.7.18 to coincide with PyCon 2020 in April, so attendees can enjoy some collective catharsis. We'll still say January 1st is the official EOL date. Thanks to Sumana Harihareswara, there's now a FAQ about the Python 2 sunset on the website: https://www.python.org/doc/sunset-python-2/ Regards, Benjamin

6 months, 1 week

Last call for comments on PEP 573 (Module State Access from C Extension Methods)

by Stefan Behnel

Hi all, I think that PEP 573 is ready to be accepted, to greatly improve the state of extension modules in CPython 3.9. https://www.python.org/dev/peps/pep-0573/ It has come a long way since the original proposal and went through several iterations and discussions by various interested people, effectively reducing its scope quite a bit. So this is the last call for comments on the latest version of the PEP, before I will pronounce on it. Please keep the discussion in this thread. Stefan

7 months, 2 weeks

Stalemate on bringing back PEP 523 support into Python 3.8

by Brett Cannon

An unfortunate side-effect of making PyInterpreterState in Python 3.8 opaque is it removed [PEP 523](https://www.python.org/dev/peps/pep-0523/) support. https://www.python.org/dev/peps/pep-0523/ was opened to try and fix this, but there seems to be a stalemate in the issue. A key question is at what API level should setting the frame evaluation function live at? No one is suggesting the stable ABI, but there isn't agreement between CPython or the internal API (there's also seems to be a suggestion to potentially remove PEP 523 support entirely). And regardless of either, there also seems to be a disagreement about providing getters and setters to continue to try and hide PyInterpreterState regardless of which API level support is provided at (if any). If you have an opinion please weight in on the issue.

7 months, 2 weeks

Request to postpone some Python 3.9 incompatible changes to Python 3.10

by Victor Stinner

Hi, Python 3.9 introduces many small incompatible changes which broke tons of Python projects, including popular projects, some of them being unmaintained but still widely used (like nose, last release in 2015). Miro and me consider that Python 3.9 is pushing too much pressure on projects maintainers to either abandon Python 2.7 right now (need to update the CI, the documentation, warn users, etc.), or to introduce a *new* compatibility layer to support Python 3.9: layer which would be dropped as soon as Python 2.7 support will be dropped (soon-ish). Python 3.9 is too early to accumulate so many incompatible changes on purpose, some incompatible changes like the removal of collections aliases to ABC should be reverted, and reapplied on Python 3.10. Python 3.9 would be the last release which still contain compatibility layers for Python 2.7. Said differently, we request to maintain the small compatibility layer in Python for one more cycle, instead of requesting every single project maintainer to maintain it on their side. We consider that the general maintenance burden is lower if it's kept in Python for now. == Fedora COPR notify packages broken by Python 3.9 == In Python 3.9, Victor introduced tons of incompatible changes at the beginning of the devcycle. His plan was to push as many as possible, and later decide what to do... This time has come :-) He wrote PEP 606 "Python Compatibility Version" and we wrote PEP 608 "Coordinated Python release", but both have been rejected. At least, it seems like most people agreed that having a CI to get notified of broken projects should help. We are updating the future Fedora 33 to replace Python 3.8 with Python 3.9. We are using a tool called "COPR" which is like a sandbox and can be seen as the CI discussed previously. It rebuilds Fedora using Python 3.9 as /usr/bin/python3 (and /usr/bin/python !). We now have a good overview of broken packages and which incompatible changes broke most packages. https://fedoraproject.org/wiki/Changes/Python3.9 - Describes the Fedora change. https://copr.fedorainfracloud.org/coprs/g/python/python3.9/monitor/ - Has package failures. Some packages fail because of broken dependencies. https://bugzilla.redhat.com/showdependencytree.cgi?id=PYTHON39 - Has open Python 3.9 bug reports for Fedora packages. Some problems have been fixed upstream already before reaching Fedora, most are only fixed when the Fedora maintainers report the problems back to upstream maintainers. Right now, there are 150+ packages broken by Python 3.9 incompatible changes. == Maintenance burden == Many Python projects have not yet removed Python 2 support and Python 2 CI. It's not that they would be in the "we will not drop Python 2 support ever" camp, it's just that they have not done it yet. Removing Python 2 compatibility code from the codebase and removing it from the documentation and metadata and CI is a boring task, doesn't bring anything to users, and it might take a new major release of the library. At this point, we are very early in 2020 to expect most projects to have already done this. At the same time, we would like them to support Python 3.9 as soon in the release cycle as possible. By removing Python 2 compatibility layers from the 3.9 standard library, we are forcing the projects maintainers to re-invent their own compatibility layers and copy-paste stuff like this around. Example: try: from collections.abc import Sequence except ImprotError: # Python 2.7 doesn't have collections.abc from collections import Sequence While if we remove collections.Sequence in 3.10, they will face this decision early in 2021 and they will simply fix their code by adding ".abc" at the proper places, not needing any more compatibility layers. Of course, there will be projects that will still have declared Python 2 support in 2021, but it will arguably not be that many. While it's certainly tempting to have "more pure" code in the standard library, maintaining the compatibility shims for one more release isn't really that big of a maintenance burden, especially when comparing with dozens (hundreds?) of third party libraries essentially maintaining their own. An good example of a broken package is the nose project which is no longer maintained (according to their website): the last release was in 2015. It remains a very popular test runner. According to libraries.io, it has with 3 million downloads per month, 41.7K dependent repositories and 325 dependent packages. We patched nose in Fedora to fix Python 3.5, 3.6, 3.8 and now 3.9 compatibility issues. People installing nose from PyPI with "pip install" get the unmaintained flavor which is currently completely broken on Python 3.9. Someone should take over the nose project and maintain it again, or every single project using nose should pick another tool (unittest, nose2, pytest, whatever else). Both options will take a lot of time. == Request to revert some incompatible changes == See https://docs.python.org/dev/whatsnew/3.9.html#removed Incompatible changes which require "if <python3>: (...) else: (...)" or "try: <python3 code> except (...): <python2 code>": * Removed tostring/fromstring methods in array.array and base64 modules * Removed collections aliases to ABC classes * Removed fractions.gcd() function (which is similar to math.gcd()) * Remove "U" mode of open(): having to use io.open() just for Python 2 makes the code uglier * Removed old plistlib API: 2.7 doesn't have the new API == Kept incompatible changes == Ok-ish incompatible changes (mostly only affects compatiblity libraries like six): * _dummy_thread and dummy_threading modules removed: broke six, nine and future projects. six and nine are already fixed for 3.9. OK incompatible changes (can be replaced by the same code on 2.7 and 3.9): * isAlive() method of threading.Thread has been removed: Thread.is_alive() method is available in 2.7 and 3.9 * xml.etree.ElementTree.getchildren() and xml.etree.ElementTree.getiterator() methods are removed from 3.9, but list()/iter() works in 2.7 and 3.9 == Call to check for DeprecationWarning in your own projects == You must pay attention to DeprecationWarning in Python 3.9: it will be the last "compatibility layer" release, incompatible changes will be reapplied to Python 3.10. For example, you can use the development mode to see DeprecationWarning and ResourceWarning: use the "-X dev" command line option or set the PYTHONDEVMODE=1 environment variable. Or you can use the PYTHONWARNINGS=default environment variable to see DeprecationWarning. You might even want to treat all warnings as errors to ensure that you don't miss any when you run your test suite in your CI. You can use PYTHONWARNINGS=error, and combine it with PYTHONDEVMODE=1. Warnings filters can be used to ignore warnings in third party code, see the documentation: https://docs.python.org/dev/library/warnings.html#the-warnings-filter -- Victor Stinner and Miro Hrončok for Fedora

7 months, 2 weeks

Comments on PEP 558 (Defined semantics for locals() )

by Mark Shannon

Hi, First of all I want to say that I'm very much in favour of the general idea behind PEP 558. Defined semantics is always better than undefined semantics :) However, I think there are a few changes needed: 1. Don't add anything to the C API, please. Frame attributes can be accessed via `PyObject_GetAttr[String]`. 2. Don't make the behaviour dependent on whether "tracing" is turned on. Doing so forces debuggers to use sys.settrace which is horribly slow. It also makes the implementation more complex, and has no benefit AFAICT. 3. Don't store write-through proxies in the frame, but make proxies retain a reference to the frame. This would reduce the size and complexity of code for handling frames. Clean up of the frame would occur naturally via reference count when all proxies have been reclaimed. The proposed implementation is hard to reason about and I am not confident that it will not introduce some new subtle bugs to replace the ones it seeks to remove. Any implementation that has functions with "Borrow" and "BreakCycles" in their names makes me nervous. A simpler conceptual model, which I believe could be made reliable, would be: No change for non-function frames (as PEP 558 currently proposes). Each access to `frame.f_locals` (for function frames) should return a new proxy object. This proxy object would have dict-like, write-through semantics for variables in the frame. For keys that do not match variable names, an exception would be raised. This means that all proxies for a single frame will have value equivalence; object equivalence is not needed. I.e. for a frame `f`, `f.f_locals == f.f_locals` would be True, even though `f.f_locals is f.f_locals` would be False. Cheers, Mark.

8 months

Python Language Summit at PyCon 2020

by Mariatta

(cross posting to python-committers and python-dev) I'm happy to announce that the signups for Python Language Summit at PyCon 2020 is now open. Full details at: https://us.pycon.org/2020/events/languagesummit/ *TL;DR* When: Wednesday, April 15, 2020, 9am–4pm (Note, we’re starting 1 hour earlier than usual!) Where: David L. Lawrence Convention Center, Pittsburgh, PA, room TBD Sign up to attend: https://forms.gle/Fg7ayhYTaY75J1r7A (closes Feb 29th, 2020 AoE) Sign up to discuss a topic: https://forms.gle/g4BXezH1Vcn7tLds5 (closes Feb 29th, 2020 AoE) *Who can attend* We welcome Python core developers, active core contributors to Python and alternative Python implementations, and anyone else who has a topic to discuss with core developers. *Who can propose a discussion topic* If you have discussion items; seeking consensus; awaiting decision on a PEP; needing help with your core dev work; or have specific questions that need answers from core developers, please submit a proposal. According to last year’s feedback, our audience prefer more discussions and shorter talks. To get an idea of past language summits, you can read past years' coverage: 2019: http://pyfound.blogspot.com/2019/05/the-2019-python-language-summit.html 2018: https://lwn.net/Articles/754152/ 2017: https://lwn.net/Articles/723251/ This year's event will be covered by A. Jesse Jiryu Davis again, and will be posted on PSF's blog. <https://us.pycon.org/2020/events/languagesummit/> Some changes to note this year: 1) We plan to start 1 hour earlier (9AM) 2) The room will have U-shaped table layout Thanks! Mariatta & Łukasz

8 months, 1 week

PEP 458: Secure PyPI downloads with package signing

by Sumana Harihareswara

Hi! I'm forwarding this on behalf of Marina Moore https://github.com/mnm678 . - Sumana Harihareswara --- PEP 458 ( https://www.python.org/dev/peps/pep-0458/ ) proposes using The Update Framework (TUF) to allow users of PyPI to verify that the packages they install originate from PyPI. Implementing this PEP would provide protection in the event of an attack on PyPI, its mirrors, or the network used to install packages. We started this PEP in 2013, and have recently revised it and restarted discussion. Recent discussion and revision of the PEP has been taking place on Discourse ( https://discuss.python.org/t/pep-458-secure-pypi-downloads-with-package-sig… ). The PEP is ready for review and I look forward to your feedback! Thanks, Marina Moore PEP 458 coauthor

8 months, 1 week

extern "C" { ... } in Include/cpython/*.h

by Skip Montanaro

(Apologies. Not sure where to ask this, and I'm not much of a C++ programmer. Maybe I should have just added a comment to the still-open issue.) I just noticed that Nick migrated the guts of Include/frameobject.h to include/cpython/frameobject.h. It's not clear to me that the latter should be #include'd directly from anywhere other than Include/frameobject.h. If that's the case, does the extern "C" stuff still need to be replicated in the lower level file? Won't the scope of the extern "C" block in Include/frameobject.h be active at the lower level? Whatever the correct answer is, I suspect the same constraints should apply to all Include/cpython/*.h files. Skip

8 months, 2 weeks

Maintenance of multiprocessing module: there are a few stalled issues/patches

by mailer＠app.tempr.email

Couldn't help but notice that there are quite a few stalled issues/patches, some of them for years even. :-/ So I thought, it might help to bump them here on the mailing list. https://bugs.python.org/issue28053https://github.com/python/cpython/pull/99…

8 months, 3 weeks

Summary of Python tracker Issues

by Python tracker

ACTIVITY SUMMARY (2020-01-24 - 2020-01-31) 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 7300 (+15) closed 43962 (+52) total 51262 (+67) Open issues with patches: 2858 Issues opened (56) ================== #36051: Drop the GIL during large bytes.join operations? https://bugs.python.org/issue36051 reopened by skip.montanaro #39350: Remove deprecated fractions.gcd() https://bugs.python.org/issue39350 reopened by mark.dickinson #39391: Nondeterministic Pydoc output on functions that have functions https://bugs.python.org/issue39391 reopened by peteroupc #39435: pickle: inconsistent arguments pickle.py vs _pickle.c vs docs https://bugs.python.org/issue39435 reopened by pitrou #39445: h5py not playing nicely with subprocess and mpirun https://bugs.python.org/issue39445 opened by Rafael Laboissière #39447: imaplib documentation claims that commands return a string, bu https://bugs.python.org/issue39447 opened by dkg #39448: Add regen-frozen makefile target https://bugs.python.org/issue39448 opened by nascheme #39450: unittest TestCase shortDescription does not strip whitespace https://bugs.python.org/issue39450 opened by scirelli #39451: enum.Enum reference count leaks https://bugs.python.org/issue39451 opened by dan.gass(a)gmail.com #39452: Improve the __main__ module documentation https://bugs.python.org/issue39452 opened by maggyero #39453: Use-after-free in list contain https://bugs.python.org/issue39453 opened by corona10 #39454: when \\u in byte_string ,byte_string.decode('raw_unicode_escap https://bugs.python.org/issue39454 opened by yayiba1223 #39456: Make IDLE calltip tests work when there are no docstrings https://bugs.python.org/issue39456 opened by terry.reedy #39457: Add an autocommit property to sqlite3.Connection with a PEP 24 https://bugs.python.org/issue39457 opened by maggyero #39460: test_zipfile: test_add_file_after_2107() sometimes fails on Fe https://bugs.python.org/issue39460 opened by vstinner #39461: [RFE] os.environ should support Path-like values, like subproc https://bugs.python.org/issue39461 opened by Antony.Lee #39462: DataClass typo-unsafe attribute creation & unexpected behaviou https://bugs.python.org/issue39462 opened by marcelpvisser #39463: ast.Constant, bytes, and ast.unparse https://bugs.python.org/issue39463 opened by Tal Ben-Nun #39464: Allow translating argparse error messages https://bugs.python.org/issue39464 opened by DjMorgul #39465: Design a subinterpreter friendly alternative to _Py_IDENTIFIER https://bugs.python.org/issue39465 opened by ncoghlan #39467: Allow to deprecate CLI arguments in argparse https://bugs.python.org/issue39467 opened by 4383 #39468: Improved the site module's permission handling while writing . https://bugs.python.org/issue39468 opened by opensource-assist #39469: Support for relative home path in pyvenv.cfg https://bugs.python.org/issue39469 opened by Jeff.Edwards #39470: Indicate that os.makedirs is equivalent to Path.mkdir https://bugs.python.org/issue39470 opened by nanjekyejoannah #39471: Meaning and clarification of PyBuffer_Release() https://bugs.python.org/issue39471 opened by seberg #39472: IDLE: improve handling of int entry in settings dialog https://bugs.python.org/issue39472 opened by terry.reedy #39473: Enable import behavior consistency option https://bugs.python.org/issue39473 opened by bluelantern #39474: col_offset for parenthesized expressions looks weird https://bugs.python.org/issue39474 opened by BTaskaya #39475: window.getmaxyx() doesn't return updated height when window is https://bugs.python.org/issue39475 opened by nova #39477: multiprocessing Pool maxtasksperchild=0 raises exception with https://bugs.python.org/issue39477 opened by jeyekomon #39479: [RFE] Add math.lcm() function: Least Common Multiple https://bugs.python.org/issue39479 opened by Ananthakrishnan #39480: referendum reference is needlessly annoying https://bugs.python.org/issue39480 opened by diziet #39481: Implement PEP 585 (Type Hinting Generics In Standard Collectio https://bugs.python.org/issue39481 opened by gvanrossum #39482: Write 2to3 fixer for collections.abc imports https://bugs.python.org/issue39482 opened by opoplawski #39483: Proposial add loop parametr to run in asyncio https://bugs.python.org/issue39483 opened by heckad #39484: time_ns() and time() cannot be compared on windows https://bugs.python.org/issue39484 opened by vxgmichel #39486: bug in %-formatting in Python, related to escaped %-characters https://bugs.python.org/issue39486 opened by Carl.Friedrich.Bolz #39488: test_largefile: TestSocketSendfile.test_it() uses too much dis https://bugs.python.org/issue39488 opened by vstinner #39489: Remove COUNT_ALLOCS special build https://bugs.python.org/issue39489 opened by vstinner #39490: Python Uninstaller fails to clean up the old path variables wh https://bugs.python.org/issue39490 opened by brucelong #39491: Import PEP 593 (Flexible function and variable annotations) su https://bugs.python.org/issue39491 opened by jstasiak #39492: reference cycle affecting Pickler instances (Python3.8+) https://bugs.python.org/issue39492 opened by pierreglaser #39495: xml.etree.ElementTree.TreeBuilder.start differs between pure P https://bugs.python.org/issue39495 opened by hauntsaninja #39496: Inelegant loops in Modules/_sqlite/cursor.c https://bugs.python.org/issue39496 opened by alex.henrie #39498: Signpost security considerations in library https://bugs.python.org/issue39498 opened by anthonypjshaw #39500: Document PyUnicode_IsIdentifier() function https://bugs.python.org/issue39500 opened by vstinner #39501: gettext's default localedir does not match documentation https://bugs.python.org/issue39501 opened by moht #39502: test_zipfile fails on AIX due to time.localtime https://bugs.python.org/issue39502 opened by EGuesnet #39503: [security][CVE-2020-8492] Denial of service in urllib.request. https://bugs.python.org/issue39503 opened by vstinner #39504: inspect.signature throws RuntimeError on select.epoll.register https://bugs.python.org/issue39504 opened by hauntsaninja #39505: redundant ‘/’ in $env:VIRTUAL_ENV when use venv in powersh https://bugs.python.org/issue39505 opened by Schwarzichet #39507: http library missing HTTP status code 418 "I'm a teapot" https://bugs.python.org/issue39507 opened by trrhodes #39508: no module curses error although i downloaded the module - wind https://bugs.python.org/issue39508 opened by haim986 #39509: Update HTTP status code to follow IANA https://bugs.python.org/issue39509 opened by corona10 #39510: use-after-free in BufferedReader.readinto() https://bugs.python.org/issue39510 opened by phg #39511: [subinterpreters] Per-interpreter singletons (None, True, Fals https://bugs.python.org/issue39511 opened by vstinner Most recent 15 issues with no replies (15) ========================================== #39510: use-after-free in BufferedReader.readinto() https://bugs.python.org/issue39510 #39508: no module curses error although i downloaded the module - wind https://bugs.python.org/issue39508 #39505: redundant ‘/’ in $env:VIRTUAL_ENV when use venv in powersh https://bugs.python.org/issue39505 #39504: inspect.signature throws RuntimeError on select.epoll.register https://bugs.python.org/issue39504 #39501: gettext's default localedir does not match documentation https://bugs.python.org/issue39501 #39498: Signpost security considerations in library https://bugs.python.org/issue39498 #39496: Inelegant loops in Modules/_sqlite/cursor.c https://bugs.python.org/issue39496 #39492: reference cycle affecting Pickler instances (Python3.8+) https://bugs.python.org/issue39492 #39491: Import PEP 593 (Flexible function and variable annotations) su https://bugs.python.org/issue39491 #39490: Python Uninstaller fails to clean up the old path variables wh https://bugs.python.org/issue39490 #39488: test_largefile: TestSocketSendfile.test_it() uses too much dis https://bugs.python.org/issue39488 #39482: Write 2to3 fixer for collections.abc imports https://bugs.python.org/issue39482 #39481: Implement PEP 585 (Type Hinting Generics In Standard Collectio https://bugs.python.org/issue39481 #39477: multiprocessing Pool maxtasksperchild=0 raises exception with https://bugs.python.org/issue39477 #39475: window.getmaxyx() doesn't return updated height when window is https://bugs.python.org/issue39475 Most recent 15 issues waiting for review (15) ============================================= #39511: [subinterpreters] Per-interpreter singletons (None, True, Fals https://bugs.python.org/issue39511 #39510: use-after-free in BufferedReader.readinto() https://bugs.python.org/issue39510 #39509: Update HTTP status code to follow IANA https://bugs.python.org/issue39509 #39507: http library missing HTTP status code 418 "I'm a teapot" https://bugs.python.org/issue39507 #39505: redundant ‘/’ in $env:VIRTUAL_ENV when use venv in powersh https://bugs.python.org/issue39505 #39503: [security][CVE-2020-8492] Denial of service in urllib.request. https://bugs.python.org/issue39503 #39502: test_zipfile fails on AIX due to time.localtime https://bugs.python.org/issue39502 #39500: Document PyUnicode_IsIdentifier() function https://bugs.python.org/issue39500 #39498: Signpost security considerations in library https://bugs.python.org/issue39498 #39496: Inelegant loops in Modules/_sqlite/cursor.c https://bugs.python.org/issue39496 #39495: xml.etree.ElementTree.TreeBuilder.start differs between pure P https://bugs.python.org/issue39495 #39492: reference cycle affecting Pickler instances (Python3.8+) https://bugs.python.org/issue39492 #39491: Import PEP 593 (Flexible function and variable annotations) su https://bugs.python.org/issue39491 #39489: Remove COUNT_ALLOCS special build https://bugs.python.org/issue39489 #39488: test_largefile: TestSocketSendfile.test_it() uses too much dis https://bugs.python.org/issue39488 Top 10 most discussed issues (10) ================================= #39460: test_zipfile: test_add_file_after_2107() sometimes fails on Fe https://bugs.python.org/issue39460 36 msgs #39479: [RFE] Add math.lcm() function: Least Common Multiple https://bugs.python.org/issue39479 22 msgs #39461: [RFE] os.environ should support Path-like values, like subproc https://bugs.python.org/issue39461 18 msgs #39502: test_zipfile fails on AIX due to time.localtime https://bugs.python.org/issue39502 14 msgs #39489: Remove COUNT_ALLOCS special build https://bugs.python.org/issue39489 9 msgs #39430: tarfile.open(mode="r") race condition when importing lzma https://bugs.python.org/issue39430 8 msgs #39483: Proposial add loop parametr to run in asyncio https://bugs.python.org/issue39483 7 msgs #18233: SSLSocket.getpeercertchain() https://bugs.python.org/issue18233 5 msgs #38792: IDLE calltips may not properly close on KeyboardInterrupt https://bugs.python.org/issue38792 5 msgs #39380: ftplib uses latin-1 as default encoding https://bugs.python.org/issue39380 5 msgs Issues closed (50) ================== #11549: Build-out an AST optimizer, moving some functionality out of t https://bugs.python.org/issue11549 closed by rhettinger #13306: Add diagnostic tools to importlib? https://bugs.python.org/issue13306 closed by brett.cannon #14715: test.support.DirsOnSysPath should be replaced by importlib.tes https://bugs.python.org/issue14715 closed by eric.smith #15243: Misleading documentation for __prepare__ https://bugs.python.org/issue15243 closed by berker.peksag #24928: mock.patch.dict spoils order of items in collections.OrderedDi https://bugs.python.org/issue24928 closed by rhettinger #25597: unittest.mock does not wrap dunder methods (__getitem__ etc) https://bugs.python.org/issue25597 closed by xtreak #30780: IDLE: configdialog - add tests for ConfigDialog GUI. https://bugs.python.org/issue30780 closed by terry.reedy #31414: IDLE: Entry tests should delete before insert. https://bugs.python.org/issue31414 closed by terry.reedy #33339: Using default encoding with `subprocess.run()` is not obvious https://bugs.python.org/issue33339 closed by eryksun #34095: [2.7] Seg fault on archlinux 32 when run tests with xvfb-run https://bugs.python.org/issue34095 closed by benjamin.peterson #36350: inspect.Signature.parameters and inspect.BoundArguments.argume https://bugs.python.org/issue36350 closed by inada.naoki #36654: Add example to tokenize.tokenize https://bugs.python.org/issue36654 closed by berker.peksag #37955: mock.patch incorrect reference to Mock https://bugs.python.org/issue37955 closed by cjw296 #38350: ./configure --with-pydebug should use -O0 rather than -Og https://bugs.python.org/issue38350 closed by vstinner #38473: AttributeError on asserting autospecced mock object added usin https://bugs.python.org/issue38473 closed by xtreak #38631: Replace Py_FatalError() with regular Python exceptions https://bugs.python.org/issue38631 closed by vstinner #38797: x86-64 High Sierra 3.x buildbot worker fails to build Python: https://bugs.python.org/issue38797 closed by vstinner #38883: Path.home() should ignore HOME env var like os.path.expanduser https://bugs.python.org/issue38883 closed by steve.dower #38932: unittest.mock.Mock.reset_mocks does not pass all arguments to https://bugs.python.org/issue38932 closed by cjw296 #39082: AsyncMock is unable to correctly patch static or class methods https://bugs.python.org/issue39082 closed by cjw296 #39153: Clarify refcounting semantics of PyDict_SetItem[String] https://bugs.python.org/issue39153 closed by corona10 #39165: Completeness and symmetry in RE, avoid `findall(...)[0]` https://bugs.python.org/issue39165 closed by rhettinger #39248: test_distutils fails on PPC64 Fedora 3.x: /tmp/subprocess.py https://bugs.python.org/issue39248 closed by vstinner #39287: Document UTF-8 mode in the using/windows. https://bugs.python.org/issue39287 closed by inada.naoki #39309: Please delete my account https://bugs.python.org/issue39309 closed by berker.peksag #39374: Key in sort -> Callable Object instead of function https://bugs.python.org/issue39374 closed by rhettinger #39388: IDLE: Changes to keybindings aren't reverted on cancel https://bugs.python.org/issue39388 closed by terry.reedy #39390: shutil.copytree - 3.8 changed argument types of the ignore cal https://bugs.python.org/issue39390 closed by giampaolo.rodola #39392: Python Turtle is not filling alternate overlapping areas of a https://bugs.python.org/issue39392 closed by terry.reedy #39393: Misleading error message upon dependent DLL resolution failure https://bugs.python.org/issue39393 closed by steve.dower #39401: [CVE-2020-8315] Unsafe dll loading in getpathp.c on Win7 https://bugs.python.org/issue39401 closed by ned.deily #39424: [easy] test_signal: test_pidfd_send_signal() uses deprecated a https://bugs.python.org/issue39424 closed by serhiy.storchaka #39434: Remove unnecessary logic of float __floordiv__ https://bugs.python.org/issue39434 closed by mark.dickinson #39443: Inhomogeneous behaviour for descriptors in between the class-i https://bugs.python.org/issue39443 closed by rhettinger #39444: Incorrect description of sorting for PrettyPrinter https://bugs.python.org/issue39444 closed by steven.daprano #39446: Documentation should reflect that all dicts are now ordered https://bugs.python.org/issue39446 closed by rhettinger #39449: New Assignment operator https://bugs.python.org/issue39449 closed by SilentGhost #39455: Update the documentation for the linecache module https://bugs.python.org/issue39455 closed by opensource-assist #39458: Multiprocessing.Pool maxtasksperchild=1 doesn't work https://bugs.python.org/issue39458 closed by Gabriel Tardif #39459: test_import: test_unwritable_module() fails on AMD64 Fedora St https://bugs.python.org/issue39459 closed by dino.viehland #39466: Spam https://bugs.python.org/issue39466 closed by xtreak #39476: Not convinced with the dynamic data type assignment https://bugs.python.org/issue39476 closed by steven.daprano #39478: can we add a median function https://bugs.python.org/issue39478 closed by vstinner #39485: Bug in mock running on PyPy3 https://bugs.python.org/issue39485 closed by cjw296 #39487: Merge duplicated _Py_IDENTIFIER identifiers in C code https://bugs.python.org/issue39487 closed by ncoghlan #39493: typing.py has an incorrect definition of closed https://bugs.python.org/issue39493 closed by gvanrossum #39494: Extra null terminators in keyword arrays in sqlite module https://bugs.python.org/issue39494 closed by berker.peksag #39497: Unused variable script_str in pysqlite_cursor_executescript https://bugs.python.org/issue39497 closed by berker.peksag #39499: ValueError using index on tuple is not showing the tuple value https://bugs.python.org/issue39499 closed by xtreak #39506: operator |= on sets does not behave like the update method https://bugs.python.org/issue39506 closed by ammar2

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Python-Dev January 2020