[issue33564] IDLE: add 'async' to codecontext block openers

Change by Terry J. Reedy : -- resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker ___

[issue33519] Should MutableSequence provide .copy()?

Change by Jelle Zijlstra : -- keywords: +patch pull_requests: +6623 stage: -> patch review ___ Python tracker ___

[issue33556] leftover thread crumb in threading.ident docstring

Change by Skip Montanaro : -- keywords: +patch pull_requests: +6622 stage: needs patch -> patch review ___ Python tracker ___

[issue33565] strange tracemalloc results

Change by Alexander Mohr : -- type: -> behavior ___ Python tracker ___ ___

[issue33565] strange tracemalloc results

New submission from Alexander Mohr : while investigating https://github.com/boto/botocore/issues/1464 I used tracemalloc (like I've done before in 3.5.2) to try to figure out where the leak was. To my surprise tracemalloc listed stacks that didn't make any sense.

[issue33522] Enable CI builds on Visual Studio Team Services

Gregory P. Smith added the comment: Your PRs made modifications to code and did not include a useful commit message or appropriate NEWS entries for the code modifications. Further, VSTS is unreliable. core-workflow made a premature decision to turn off Travis and AppVeyor

[issue28556] typing.py upgrades

Change by Ivan Levkivskyi : -- pull_requests: +6624 ___ Python tracker ___ ___

[issue33553] Documentation improvement proposal for multiprocessing

Change by Derek Kim : -- title: possible documentation improvement proposal for multiprocessing -> Documentation improvement proposal for multiprocessing ___ Python tracker

[issue26819] _ProactorReadPipeTransport pause_reading()/resume_reading() broken if called before any read is perfored

Change by Serhiy Storchaka : -- versions: +Python 3.6, Python 3.7, Python 3.8 -Python 3.5 ___ Python tracker ___

[issue33549] xmlbuilder's `_AsyncDeprecatedProperty` make no sens now that async is a keyword.

Serhiy Storchaka added the comment: New changeset 216a27766fab59f4dfecfae0c453f7f3fd478989 by Serhiy Storchaka (Miss Islington (bot)) in branch '3.7': bpo-33549: Remove shim and deprecation warning to access DocumentLS.async. (GH-6924) (GH-6929)

[issue33549] xmlbuilder's `_AsyncDeprecatedProperty` make no sens now that async is a keyword.

Serhiy Storchaka added the comment: Thank you Matthias! -- resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker

[issue33553] Documentation improvement proposal for multiprocessing

Derek Kim added the comment: https://docs.python.org/3.8/library/multiprocessing.html#multiprocessing-programming here is the link to the document. -- ___ Python tracker

[issue33554] Optimize PyDictObject

New submission from b@n : make_keys_shared reusing oldkeys memory -- components: Interpreter Core messages: 316901 nosy: b@n priority: normal severity: normal status: open title: Optimize PyDictObject type: enhancement versions: Python 3.8

[issue23722] During metaclass.__init__, super() of the constructed class does not work

Serhiy Storchaka added the comment: An alternate PR 6933 replaces it with a RuntimeWarning. -- ___ Python tracker ___

[issue23722] During metaclass.__init__, super() of the constructed class does not work

Change by Serhiy Storchaka : -- pull_requests: +6603 ___ Python tracker ___ ___

[issue33501] split existing optimization levels into granular options

Nick Coghlan added the comment: PSF link for Diana Clark's thread on python-ideas about this: https://mail.python.org/pipermail/python-ideas/2017-September/047224.html (this is the same thread Brett linked, just to the PSF archives rather than Google Groups) --

[issue33554] Optimize PyDictObject

Change by Roundup Robot : -- keywords: +patch pull_requests: +6602 stage: -> patch review ___ Python tracker ___

[issue33507] Improving the html rendered by cgitb.html

STINNER Victor added the comment: It's difficult to discuss colors, maybe because I'm partially colorblind :-), each people has different taste. Instead of hardcoding colors, would it be better to use CSS instead. -- nosy: +vstinner

[issue13631] readline fails to parse some forms of .editrc under editline (libedit) emulation on Mac OS X

Ned Deily added the comment: Thanks for the patch and PR, Zvezdan! Merged for 3.7.0 and 3.8.0. -- resolution: -> fixed stage: patch review -> resolved status: open -> closed versions: +Python 3.8 -Python 2.7, Python 3.5, Python 3.6

[issue33521] Add 1.32x faster C implementation of asyncio.isfuture().

Change by STINNER Victor : -- nosy: +vstinner versions: -Python 3.6, Python 3.7 ___ Python tracker ___

[issue33513] incorrect detection of information of some distributions python2

STINNER Victor added the comment: Oh wow. That looks more like a new feature than a bugfix or short cleanup. I'm not sure that it's ok to do it in Python 2. platform.linux_distribution() is deprecated since Python 3.5 and just has been removed from Python 3.8: see

[issue28167] remove platform.linux_distribution()

STINNER Victor added the comment: Can you please have a look at bpo-33513 which is for Python 2.7: "incorrect detection of information of some distributions python2"? -- ___ Python tracker

[issue33549] xmlbuilder's `_AsyncDeprecatedProperty` make no sens now that async is a keyword.

Change by Serhiy Storchaka : -- components: +Library (Lib), XML versions: +Python 3.7, Python 3.8 ___ Python tracker ___

[issue23722] During metaclass.__init__, super() of the constructed class does not work

Change by Serhiy Storchaka : -- pull_requests: -1013 ___ Python tracker ___

[issue23722] During metaclass.__init__, super() of the constructed class does not work

Serhiy Storchaka added the comment: PR 6931 replaces a DeprecationWarning with a RuntimeError (is it correct?). It was planned to do in 3.7, but it is too later for 3.7. -- resolution: fixed -> stage: resolved -> patch review status: closed -> open

[issue33513] incorrect detection of information of some distributions python2

Change by Serhiy Storchaka : -- resolution: -> wont fix stage: patch review -> resolved status: open -> closed ___ Python tracker

[issue33549] xmlbuilder's `_AsyncDeprecatedProperty` make no sens now that async is a keyword.

Serhiy Storchaka added the comment: New changeset f90f5d5c1d95721e0ca0b1c302e3d13ed34753a8 by Serhiy Storchaka (Matthias Bussonnier) in branch 'master': bpo-33549: Remove shim and deprecation warning to access DocumentLS.async. (GH-6924)

[issue33475] Fix converting AST expression to string and optimize parenthesis

Serhiy Storchaka added the comment: There are still problems with f-strings like f'''{"'"}''' => f'{"\'"}' (SyntaxError: f-string expression part cannot include a backslash). But this is a separate hard issue (issue33552). --

[issue33552] f-strings and string annotations

New submission from Serhiy Storchaka : There are problems with converting annotations containing f-strings into strings (from __future__ import annotations). For example f'''{"'"}''' is converted to f'{"\'"}', but the latter is a syntax error. >>> from __future__

[issue13631] readline fails to parse some forms of .editrc under editline (libedit) emulation on Mac OS X

Ned Deily added the comment: New changeset d504108a88bd14a560dec875df682f4e581490e5 by Ned Deily (Miss Islington (bot)) in branch '3.7': bpo-13631: Fix the order of initialization for readline libedit on macOS. (GH-6915) (GH-6928)

[issue33549] xmlbuilder's `_AsyncDeprecatedProperty` make no sens now that async is a keyword.

Change by miss-islington : -- pull_requests: +6600 ___ Python tracker ___

[issue33551] The string prefixes u and f can't used together

Benjamin Peterson added the comment: Why would you want to do that? -- nosy: +benjamin.peterson ___ Python tracker ___

[issue33553] possible documentation improvement proposal for multiprocessing

New submission from Derek Kim : >>> from multiprocessing import Pool >>> p = Pool(5) >>> def f(x): ... return x*x ... >>> p.map(f, [1,2,3]) This example in the document is confusing because this is already wrong code when run with fork method even if you run it as

[issue33518] Add PEP to glossary

STINNER Victor added the comment: New changeset d5f144260886959c1fe06bc4506a23fd10f92348 by Victor Stinner (Andrés Delfino) in branch 'master': bpo-33518: Add PEP entry to documentation glossary (GH-6860)

[issue23722] During metaclass.__init__, super() of the constructed class does not work

Serhiy Storchaka added the comment: Nick, should a DeprecationWarning be replaced with a RuntimeWarning or a RuntimeError? There are contradictions about this in comments and the documentation. -- ___ Python tracker

[issue23722] During metaclass.__init__, super() of the constructed class does not work

Change by Serhiy Storchaka : -- pull_requests: +6601 ___ Python tracker ___ ___

[issue33554] Optimize PyDictObject

INADA Naoki added the comment: Could you show some micro benchmark shows performance benefit? -- nosy: +inada.naoki ___ Python tracker

[issue13631] readline fails to parse some forms of .editrc under editline (libedit) emulation on Mac OS X

Change by miss-islington : -- pull_requests: +6599 ___ Python tracker ___

[issue33475] Fix converting AST expression to string and optimize parenthesis

Change by Serhiy Storchaka : -- pull_requests: +6598 ___ Python tracker ___ ___

[issue13631] readline fails to parse some forms of .editrc under editline (libedit) emulation on Mac OS X

Ned Deily added the comment: New changeset c2f082e9d164acfa8f96de9526f0f47ae92c426a by Ned Deily (Zvezdan Petkovic) in branch 'master': bpo-13631: Fix the order of initialization for readline libedit on macOS. (GH-6915)

[issue33551] The string prefixes u and f can't used together

Serhiy Storchaka added the comment: The string prefix u is used exclusively for compatibility with Python 2. It helps writing code that works in Python 2 and Python 3. The string prefix f is not compatible with Python 2. If you use it, you no longer have reasons

[issue31973] Incomplete DeprecationWarning for async/await keywords

Sorin Sbarnea added the comment: I agree that this deprecation approach is not very helpful because it does not indicate a recommended way to fix. Yep, we all know that we will be forced to rename these parameters/variables everywhere and likely break few APIs due to

[issue2506] Add mechanism to disable optimizations

Serhiy Storchaka added the comment: > If anyone has needed a workaround in the past 9 years and hasn't yet found > one: This no longer works in 3.7 due to folding constants at the AST level. :-) -- nosy: +serhiy.storchaka versions: +Python 3.8 -Python 3.6

[issue33388] Support PEP 566 metadata in dist.py

Nick Coghlan added the comment: If these warnings are being emitted when using setuptools, that's a bug in setuptools (as it should be ensuring these are handled without warnings), and can be reported over on https://github.com/pypa/setuptools/ If these warnings are being

[issue33554] Optimize PyDictObject

Serhiy Storchaka added the comment: Are you aware of causes that prevented writing the code in this way? This will break OrderedDict. Issue31954 is an attempt to solve this problem (and it supersedes this issue). -- nosy: +serhiy.storchaka

[issue13474] Mention of "-m" Flag Missing From Doc on Execution Model

Nick Coghlan added the comment: I've assigned the PR and issue to myself, as the proposed addition in the PR isn't quite right, but it isn't immediately obvious why not. The gist of the problem is that the current docs are actually correct and complete: modules are the

[issue33518] Add PEP to glossary

Change by Andrés Delfino : -- pull_requests: +6606 ___ Python tracker ___ ___

[issue32414] PyCapsule_Import fails when name is in the form 'package.module.capsule'

Nick Coghlan added the comment: Ah, sorry, I misinterpreted Petr's comment, and then didn't look at the details of your PR before commenting. Having fixed that mistake, I agree that making the naive approach "just work" is a good option. --

[issue33522] Enable CI builds on Visual Studio Team Services

Steve Dower added the comment: New changeset 0d8f83f59c8f4cc7fe125434ca4ecdcac111810f by Steve Dower in branch '3.6': bpo-33522: Enable CI builds on Visual Studio Team Services (GH-6865) (GH-6925)

[issue2506] Add mechanism to disable optimizations

Ned Batchelder added the comment: Folding constants won't affect control flow. The important thing here is to disable optimizing away jumps to jumps. -- ___ Python tracker

[issue33555] No SyntaxError raised for `return` with argument inside generator

Serhiy Storchaka added the comment: It is not silently ignored. It is used as an argument to construct StopIteration. See The Python Language Reference: https://docs.python.org/3/reference/simple_stmts.html#the-return-statement -- nosy: +serhiy.storchaka

[issue33518] Add PEP to glossary

Change by Andrés Delfino : -- pull_requests: +6604 ___ Python tracker ___ ___

[issue33547] Relative imports do not replace local variables

Nick Coghlan added the comment: As David notes, the issue in the example is the fact that you're setting "__main__.a", so "a.py" never gets imported as a module - it gets a hit on the parent module attribute, and hence stops there. -- resolution: -> not a bug

[issue33555] No SyntaxError raised for `return` with argument inside generator

FHTMitchell added the comment: Whoops I understand. Reclosed. -- resolution: -> not a bug status: open -> closed ___ Python tracker

[issue32604] Expose the subinterpreters C-API in Python for testing use.

Change by Eric Snow : -- pull_requests: +6607 ___ Python tracker ___ ___

[issue33538] Remove useless check in subprocess

TaoQingyun <845767...@qq.com> added the comment: I can't find the reset code, could you give me a link? Thanks. -- ___ Python tracker ___

[issue33554] Optimize PyDictObject

b@n added the comment: Will not break OrderedDict, The order is still the same. -- ___ Python tracker ___

[issue33522] Enable CI builds on Visual Studio Team Services

Steve Dower added the comment: New changeset 8965d75c90e80b6983b36f3ae9601d6a257d782b by Steve Dower (Miss Islington (bot)) in branch '3.7': bpo-33522: Enable CI builds on Visual Studio Team Services (GH-6865) (GH-6926)

[issue33501] split existing optimization levels into granular options

Brett Cannon added the comment: I don't thnk they are quite the same. The other issue is about turning off the peepholer entirely while this one is about breaking up the optimizations that -O and -OO do so you can choose which ones you want (e.g. still drop docstrings but

[issue33556] leftover thread crumb in threading.ident docstring

New submission from Skip Montanaro : There is a leftover reference to "thread.get_ident" in the docstring for threading.ident. I believe it needs a leading underscore. Hopefully a PR isn't required for this. I'm not equipped to generate one at the moment, and this

[issue33499] Environment variable to set alternate location for pycache tree

Barry A. Warsaw added the comment: On May 17, 2018, at 08:14, Nick Coghlan wrote: > > If we did add an option, then a named -X option would probably make the most > sense. +1 -- ___ Python tracker

[issue31656] Bitwise operations for bytes-type

Nick Coghlan added the comment: Issue 19251 is still under consideration, so marking this as a duplicate, rather than as rejected. -- nosy: +ncoghlan resolution: rejected -> duplicate superseder: -> bitwise ops for bytes of equal length

[issue33499] Environment variable to set alternate location for pycache tree

Nick Coghlan added the comment: Regarding environment variables, note that they get used in two *very* different ways: 1. The "persistent shell setting" case that Raymond describes. While setting PYTHONBYTECODEPATH to always point to a RAM disk could make quite a bit of

[issue33556] leftover thread crumb in threading.ident docstring

Zachary Ware added the comment: Rather than a leading underscore, I think `thread.` should just be removed. `get_ident` is now exposed by the threading module itself. For a change this small, https://github.com/python/cpython/edit/master/Lib/threading.py can be used

[issue33501] split existing optimization levels into granular options

Serhiy Storchaka added the comment: Isn't this a duplicate of the old issue2506? -- nosy: +serhiy.storchaka ___ Python tracker

[issue33555] No SyntaxError raised for `return` with argument inside generator

New submission from FHTMitchell : In python 2.7 if you run the following code you get an error (as you would expect) Python 2.7.14 | packaged by conda-forge | (default, Dec 25 2017, 01:17:32) [MSC v.1500 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or

[issue32414] PyCapsule_Import fails when name is in the form 'package.module.capsule'

Nick Coghlan added the comment: The behaviour I'd expect to see: "module:qual.name" -> "imports module, accesses module.qual.name" "module.qual.name" -> "no implicit import, accesses module.qual.name" "package.submodule:qual.name" -> "imports package.submodule, accesses

[issue33555] No SyntaxError raised for `return` with argument inside generator

FHTMitchell added the comment: Apologies if I wasn't clear. I understand that def f(): yield 1 return is valid python. What I'm saying, if you follow the link, is that def f(): yield 1 return 2 # not the argument should not be considered valid python

[issue33341] python3 fails to build if directory or sysroot contains "*icc*" string

Martin Panter added the comment: Maybe this is the same as Issue 28584, about the ${CC} variable rather than “sysroot”. In any case, the patch looks unrelated. -- nosy: +martin.panter ___ Python tracker

[issue32414] PyCapsule_Import fails when name is in the form 'package.module.capsule'

Serhiy Storchaka added the comment: This change would break virtually all existing usages of PyCapsule_Import(). And it would look very surprising taking into account the name of this function. Currently "package.submodule.qual.name" imports package and accesses

[issue33554] Optimize PyDictObject

Serhiy Storchaka added the comment: Ah, I didn't notice that this affects only dicts with shared keys! Well, this is not related to the issue with OrderedDict which can't have shared keys. Still we need evidences of the performance benefit. The PR adds >40 lines

[issue33518] Add PEP to glossary

Change by Andrés Delfino : -- pull_requests: +6605 ___ Python tracker ___ ___

[issue33462] reversible dict

Rémi Lapeyre added the comment: Hi Serhiy Storchaka, I will update the PR to implement this functionality in the views too -- ___ Python tracker

[issue33257] Race conditions in Tkinter with non-threaded Tcl

Ivan Pozdeev added the comment: 2nd fix ready. @devteam The issue is fixed completely now, the fix can be merged. Pushed to the same PR, see https://github.com/python/cpython/pull/6444#issuecomment-389844872 why. Used the option "Hold the Tcl lock for the entire

[issue2506] Add mechanism to disable optimizations

Serhiy Storchaka added the comment: Few different optimizations work together here. Folding constants at the AST level allows to eliminate the constant expression statement in the code generation stage. This makes 'continue' a first statement in the 'if' body.

[issue33557] Windows multiprocessing doesn't propagate tabcheck to children

New submission from Jakub Wilk : Multiprocessing on Windows is supposed to start child processes using the same sys.flags as the current process (see issue 12098). However, at least sys.flags.tabcheck is not propagated. I've attached small test program that reproduces this bug.

[issue33559] Exception's repr change not documented

Change by Miro Hrončok : -- type: -> behavior ___ Python tracker ___ ___ Python-bugs-list

[issue33559] Exception's repr change not documented

New submission from Miro Hrončok : Python 3.6.5 ... >>> Exception('foo',) Exception('foo',) Python 3.7.0b4 ... >>> Exception('foo',) Exception('foo') This is a change that might bit people who rely on doctesting. It is not documented at

[issue33051] IDLE: Create new tab for editor options in configdialog

Cheryl Sabella added the comment: Yes, I thought it would be good to have this before issue33046. -- ___ Python tracker ___

[issue19950] Document that unittest.TestCase.__init__ is called once per test

Change by miss-islington : -- pull_requests: +6608 ___ Python tracker ___

[issue19950] Document that unittest.TestCase.__init__ is called once per test

Gregory P. Smith added the comment: New changeset dff46758f267ad6c13096c69c4e1dee17f9969aa by Gregory P. Smith in branch 'master': bpo-19950: Clarify unittest TestCase instance use. (GH-6875) https://github.com/python/cpython/commit/dff46758f267ad6c13096c69c4e1dee17f9969aa

[issue19251] bitwise ops for bytes of equal length

Serhiy Storchaka added the comment: Nick, for your tasks you may be interested in PEP 3118 which still is not completely implemented (issue3132). -- ___ Python tracker

[issue28584] ICC compiler check is too permissive

Gianfranco added the comment: I'm attaching the patch that works also for parameters, e.g. when CC contains --sysroot=/home/icc or similar. we can mark https://bugs.python.org/issue33341 duplicate to this one I think -- nosy: +locutusofborg versions:

[issue33341] python3 fails to build if directory or sysroot contains "*icc*" string

Terry J. Reedy added the comment: icc-find.patch (and a 2nd version) has been uploaded to #28584 also. I unlinked the erroneous upload 'patch'. -- ___ Python tracker

[issue33537] Help on importlib.resources outputs the builtin open description

Barry A. Warsaw added the comment: New changeset 0ed66df5242138fc599b4735749e55f953d9a1e4 by Barry Warsaw in branch 'master': bpo-33537: Add an __all__ to importlib.resources (#6920) https://github.com/python/cpython/commit/0ed66df5242138fc599b4735749e55f953d9a1e4

[issue33538] Remove useless check in subprocess

Serhiy Storchaka added the comment: It is in PyImport_Cleanup() in Python/import.c. Search PyObject_SetItem(modules, name, Py_None). If you will run Python with the -v option you will see numerous messages "# cleanup[2] removing ..." emitted on stderr.

[issue32604] Expose the subinterpreters C-API in Python for testing use.

Eric Snow added the comment: New changeset 3ab0136ac5d6059ce96d4debca89c5f5ab0356f5 by Eric Snow in branch 'master': bpo-32604: Implement force-closing channels. (gh-6937) https://github.com/python/cpython/commit/3ab0136ac5d6059ce96d4debca89c5f5ab0356f5

[issue19251] bitwise ops for bytes of equal length

Nick Coghlan added the comment: I'm back in the embedded software world now, and hence working with the combination of: - low level serial formats (including fixed length CAN packets) - C firmware developers that are quite capable of writing supporting C-in-Python code

[issue33341] python3 fails to build if directory or sysroot contains "*icc*" string

Gianfranco added the comment: This was the patch I wanted to add, but I picked up a wrong one (a vbox one) In any case, duplicate of issue28584 -- keywords: +patch resolution: -> duplicate Added file: https://bugs.python.org/file47596/icc-find.patch

[issue33499] Environment variable to set alternate location for pycache tree

Carl Meyer added the comment: Can we have a named -X option that also takes a parameter? I don't see any existing examples of that. This option needs to take the path where bytecode should be written. Are there strong use-cases for having a CLI arg for this? I don't mind

[issue19251] bitwise ops for bytes of equal length

Nick Coghlan added the comment: This issue isn't at the stage where a PR would help - the core question is still "Should we add better native support for multi-byte bitwise operations?", not the specifics of what they API might look like or how we would implement it.

[issue19251] bitwise ops for bytes of equal length

Марк Коренберг added the comment: @ncoghlan Could you please create Pull-request on Github ? -- ___ Python tracker ___

[issue33341] python3 fails to build if directory or sysroot contains "*icc*" string

Change by Terry J. Reedy : Removed file: https://bugs.python.org/file47547/patch ___ Python tracker ___

[issue33516] unittest.mock: Add __round__ to supported magicmock methods

Change by John Reese : -- nosy: +jreese, lukasz.langa ___ Python tracker ___ ___

[issue33051] IDLE: Create new tab for editor options in configdialog

Terry J. Reedy added the comment: A new option would (maybe) apply to saving the shell also. (Something to discuss there.) -- ___ Python tracker

[issue33341] python3 fails to build if directory or sysroot contains "*icc*" string

Change by Terry J. Reedy : -- stage: patch review -> resolved status: open -> closed superseder: -> ICC compiler check is too permissive ___ Python tracker

[issue33522] Enable CI builds on Visual Studio Team Services

Steve Dower added the comment: This is implemented and merged now. I'll leave it to core-workflow to decide whether and when to make the builds required and/or reduce use of Travis/AppVeyor. -- resolution: -> fixed stage: patch review -> resolved

[issue33558] Python has no icon in taskbar and in start screen

New submission from Filip : I've just downloaded the latest version of Python (3.6.5) from python.org. After installing, I launched it and I found out the app has no icon. Then I tried to download Python using different link, but it was the same as the first try.

[issue33560] tuple.index() could return a more explicit error message

New submission from Cyril Roelandt : The tuple.index() method returns an error message that does not allow users to know what element was being looked for inside the tuple: >>> ().index(1) Traceback (most recent call last): File "", line 1, in ValueError:

[issue19251] bitwise ops for bytes of equal length

Nick Coghlan added the comment: Thanks for the link Serhiy (I'd forgotten about the struct changes proposed in PEP 3118), but the existing struct formatting codes are fine for my purposes. The question is whether we might be able to avoid some bytes->Python-objects->bytes

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