Mailman 3 June 2021 - Python-Dev

My help with yours IDLE
by MatroCholo June 7, 2021

June 7, 2021

Dear Python Developers, I have found that default IDLE can't open .py files on double click and IDLE isn't shown in "Open with" menu. I have solved this problem by converting idle.bat in \lib\idlelibs\ into .exe file. If you are interested in my help, you can learn more in my GitHub repo - https://github.com/MatroCholo/idle2exe Thanks for your extremely helpful attention to this matter. Yours faithfully, MatroCholo

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Why list.sort() uses mergesort and not timsort?
by Marco Sulla June 7, 2021

June 7, 2021

As title. Is it faster for inplace sorting, or simply the implementation of list.sort() was done before the implementation of timsort?

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March Steering Council update.
by Thomas Wouters June 7, 2021

June 7, 2021

The SC has just published the community update for March: https://github.com/python/steering-council/blob/main/updates/2021-03-steeri… We're still trying to get these done every month, but between the rush of PEPs and other issues before the 3.10b1 deadline, and PyCon US, we're delayed a little. (The April update hopefully won't be too long.) In the meantime, the SC keynote from PyCon US covers our longer-term plans and our points of view on a few other subjects, and that will hopefully be up … [View More]on YouTube ( https://www.youtube.com/playlist?list=PL2Uw4_HvXqvYk1Y5P8kryoyd83L_0Uk5K) soon. (Since it's mentioned in the notes below, I just want to point out that we didn't record on April 19th; it was pushed back to May 3rd, the same day 3.10b1 was cut.) March 1 - Steering Council synced up on the rejection draft for PEP 651. Group discussed the importance of conveying that all aspects of the proposal were reviewed and the decision is a holistic one. Group will continue working on the draft and will sync up via Slack during the week so it can be sent out. - The Steering Council discussed PEP 648. Barry created a doc and the group will consolidate feedback+questions into this document. Then the Steering Council will post this on Discourse as well as to python-dev@. - The Steering Council extensively discussed PEP 637. The group decided that it would reject the PEP based on the PEPs costs not being worth the benefits. - The Steering Council also discussed typing in general and who should own it. - Next week the SC will vote on the Documentation Work Group's charter. <https://github.com/python/steering-council/blob/main/updates/2021-03-steeri…>March 8 - The Steering Council discussed Mark's response to the rejection of PEP 651. - The group also discussed the notification for PEP 637. - The group approved PEP 624 & PEP 597. - The Steering Council discussed PEP 644 and decided further communication was needed with Christian. - The Steering Council voted on and approved the Documentation Work Group. - The group discussed moving master to main and decided it needed to be done. The SC discussed communication around this change. <https://github.com/python/steering-council/blob/main/updates/2021-03-steeri…>March 15 - Thomas updated the notifications for PEP 597, PEP 624 and PEP 637, and sent out the notifications March 15th. - Group checked in on the draft for PEP 648. Thomas has more text to add to it. - The Steering Council discussed what kind of presentation they will give at PyCon US. The group decided on a combination of presentation and Q&A. Team is working on an outline. SC members were also reminded to register for PyCon US, and encourage others to do so. - Barry proposed to the SC that they create a Work Group with a subset of the Python Security Response Team members and that group can help scope the future of the PSRT group. Everyone is fine with this. - Steering Council discussed code of conduct situations around changing master to main. The group decided on a warning to S.D. that will be sent as a warning to all. Thomas is working on the initial draft. <https://github.com/python/steering-council/blob/main/updates/2021-03-steeri…>March 22 - Barry and Thomas checked-in on PEP 648's draft response, they will be sending it out soon. - The SC reviewed PEP 644 more. Pablo raised a concern around users that can be in an env without OpenSSL 1.1.1 or newer and then not being able to use wheels. Pablo will email Christian to get clarification and will keep the SC informed. - Steering Council discussed their keynote at PyCon US 2021. They would like to gather questions from the community. Ewa will create a Slido, which will be live from April 5 to 11th. SC will review questions on the 12th. The current plan is to record on April 19th. - Steering Council discussed the response to Debian. Carol's done with her draft. Pablo is going to take a look at it to see if anything else needs to be added. - SC discussed the behavior on python-dev@ pertaining to switching git from master to main. <https://github.com/python/steering-council/blob/main/updates/2021-03-steeri…>March 29 - The Steering Council accepted PEP 644 (Require OpenSSL 1.1.1 or newer) - SC accepted PEP 652 (Maintaining the Stable ABI) - SC checked in on the draft response for PEP 648 (Extensible customizations of the interpreter at startup), and the draft response to the Debian discussion. - SC met with Ezio, PM for the GitHub Issues migration, to talk about status, progress and next steps, including keeping python-dev up to date. -- Thomas Wouters <thomas(a)python.org> Hi! I'm an email virus! Think twice before sending your email to help me spread! [View Less]

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Proposal: declare "unstable APIs"
by Guido van Rossum June 7, 2021

June 7, 2021

This is not a complete thought yet, but it occurred to me that while we have deprecated APIs (which will eventually go away), and provisional APIs (which must mature a little before they're declared stable), and stable APIs (which everyone can rely on), it might be good to also have something like *unstable* APIs, which will continually change without ever going away or stabilizing. Examples would be the ast module (since the AST structure changes every time the grammar changes) and anything to … [View More]

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GDB not breaking at the right place
by Skip Montanaro June 7, 2021

June 7, 2021

I'm having a hard time debugging some virtual machine code because GDB won't break where it's supposed to. Here's my breakpoint #2: 2 breakpoint keep y 0x00005555556914fd ceval_reg.h:_PyEval_EvalFrameDefault:TARGET_JUMP_IF_FALSE_REG breakpoint already hit 1 time p/x oparg p (oparg >> 16) & 0xff | (oparg >> 8) & 0xff p oparg & 0xff p *fastlocals@4 but when it breaks, it's not at the beginning of the case (that is, where the … [View More]

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PEP 661: Sentinel Values
by Tal Einat June 7, 2021

June 7, 2021

Hi, I have prepared a PEP proposing adding a stdlib function for defining sentinel values. You can find the PEP here: https://www.python.org/dev/peps/pep-0661/ The discussion is happening in the discourse server: https://discuss.python.org/t/pep-661-sentinel-values/9126 To avoid splitting the discussion, *please redirect your comments there* instead of replying to this thread. Have a nice week, - Tal Einat

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name for new Enum decorator
by Ethan Furman June 6, 2021

June 6, 2021

Greetings! The Flag type in the enum module has had some improvements, but I find it necessary to move one of those improvements into a decorator instead, and I'm having a hard time thinking up a name. What is the behavior? Well, a name in a flag type can be either canonical (it represents one thing), or aliased (it represents two or more things). To use Color as an example: class Color(Flag): RED = 1 # 0001 GREEN = 2 # … [View More]

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change of behaviour for '.' in sys.path between 3.10.0a7 and 3.10.0b1
by Robin Becker June 5, 2021

June 5, 2021

I have a failing test case in 3.10.0b1 for code that uses changes to sys.path and attempts to load unpackaged modules by changing directory and placing '.' into sys.path; the code works as expected in 2.7.18, 3.6-3.10.0a7. I printed out related variables in the a7 and b1 runs and find that sys.path is identical (modulo version name changes) and that os.getcwd() is as expected and that os.path.isfile('./%s.py' % modulename) is True. In a7 exec('%s as m', NS) works, but in b1 I get … [View More]

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Summary of Python tracker Issues
by Python tracker June 4, 2021

June 4, 2021

ACTIVITY SUMMARY (2021-05-28 - 2021-06-04) 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 7426 ( +2) closed 48623 (+49) total 56049 (+51) Open issues with patches: 2940 Issues opened (29) ================== #43921: test_ssl: test_wrong_cert_tls13() and test_pha_required_nocert https://bugs.python.org/issue43921 reopened by christian.heimes #… [View More]

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Need help to debug a ssl crash on Windows which prevents merging PRs
by Victor Stinner June 2, 2021

June 2, 2021

Hi, In the 3.10 branch, it became really hard to merge PRs because the following ssl crashs on Windows: https://bugs.python.org/issue44252 It has a failure rate 1/2 (on average) on the "Windows x86" and "Windows x64" jobs of GitHub Action and on the Win32 and Win64 jobs of the Azure Pipelines. I failed to reproduce it on an up to date Windows 10 with an up to date Visual Studio 2019. I cannot say if it's a race condition, if it's a bug in Python, if it's a bug in the tests (it sounds … [View More]

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