[issue38935] File modes with '+' character does not give expected output

Steven D'Aprano added the comment: This is expected behaviour. You read from the position of the file pointer, not the beginning of the file, so after writing to to the file, you have to use the seek() method to return to the beginning if you want to read what you just wrote.

[issue38935] File modes with '+' character does not give expected output

Anmol Kejriwal added the comment: According to the doc, https://docs.python.org/3/library/functions.html#open The expected output for r+ mode in the program mentioned earlier should be: 123This is python. This is an easy language. Anyone can learn this easily --

[issue38935] File modes with '+' character does not give expected output

New submission from Anmol Kejriwal : The file modes a+, r+, w+ should read and write both. But a+ and w+ modes are not reading anything from the file. The RUN for the program is successful, but there is no output from the program. Below is a simple program: file=open("abcd.txt","w+")

[issue38898] Tkinter checkbutton switch on and off together

Change by Serhiy Storchaka : -- resolution: -> duplicate stage: -> resolved status: open -> closed superseder: -> Problem with Checkbutton and duplicate last name components ___ Python tracker

[issue38917] Color setting doesn't work in tkinter

Ned Deily added the comment: I believe this is a duplicate of Issue36468 which identifies the issue which is apparently fixed in Tk 8.6.9+; it also provides a workaround for Tk 8.6.8. -- nosy: +ned.deily resolution: -> duplicate stage: -> resolved status: open -> closed superseder:

[issue38933] unusual behaviour on list of dependable lambdas

Karthikeyan Singaravelan added the comment: This could also help in understanding late binding that happens with the lambdas in the report : https://docs.python-guide.org/writing/gotchas/#late-binding-closures -- nosy: +xtreak ___ Python tracker

[issue38898] Tkinter checkbutton switch on and off together

Change by Ned Deily : -- nosy: +gpolo, serhiy.storchaka ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38932] unittest.mock.Mock.reset_mocks does not pass all arguments to its children

Vegard Stikbakke added the comment: Oh, right! Thanks! -- ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38933] unusual behaviour on list of dependable lambdas

Vedran Čačić added the comment: Why exactly is [2,3] expected? In the first example, the inner list has two functions that are _exactly the same_. Each of them takes a, grabs i from outer scope, and returns a[i]. (And of course, at the moment of evaluation of these functions, i is 1.) Do

[issue26730] SpooledTemporaryFile rollover corrupts data silently when Unicode characters are written

Inada Naoki added the comment: > Do we need to explicitly document the return value change of _file which is > documented with a separate versionchanged directive for 3.7 and 3.8? I feel it is too detailed. Note that the _file attribute may be TextIOWrapper after rollover() anyway and the

[issue26730] SpooledTemporaryFile rollover corrupts data silently when Unicode characters are written

Karthikeyan Singaravelan added the comment: Do we need to explicitly document the return value change of _file which is documented with a separate versionchanged directive for 3.7 and 3.8? Code like below could fail in them since TextIOWrapper doesn't have getvalue attribute as the minor

[issue26730] SpooledTemporaryFile rollover corrupts data silently when Unicode characters are written

Serhiy Storchaka added the comment: Thank you Inada-san. -- ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38916] Remove array.fromstring

Dong-hee Na added the comment: > The other deprecation in the array module says, "Deprecated since version > 3.3, will be removed in version 4.0". Perhaps this one should have had the > same qualifier. I agree, How about note it in the documentation and logging rather than removing them?

[issue26730] SpooledTemporaryFile rollover corrupts data silently when Unicode characters are written

Change by Inada Naoki : -- resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker ___ ___

[issue38524] functools.cached_property is not supported for setattr

Tal Einat added the comment: Thanks for the suggestion hongweipeng! Thanks for the PR Florian, and congratulations on your first contribution to the project! May it be the first of many. -- resolution: -> fixed stage: patch review -> resolved status: open -> closed

[issue38524] functools.cached_property is not supported for setattr

miss-islington added the comment: New changeset c0db88f6abbace79644b2aca2290bf41b1a37174 by Miss Islington (bot) in branch '3.8': bpo-38524: clarify example a bit and improve formatting (GH-17406) https://github.com/python/cpython/commit/c0db88f6abbace79644b2aca2290bf41b1a37174 --

[issue38524] functools.cached_property is not supported for setattr

miss-islington added the comment: New changeset 7e9bbbe51e74e5928e6a6c3e70434d824970ef58 by Miss Islington (bot) in branch '3.7': bpo-38524: clarify example a bit and improve formatting (GH-17406) https://github.com/python/cpython/commit/7e9bbbe51e74e5928e6a6c3e70434d824970ef58 --

[issue37883] threading.Lock.locked is not documented

Tal Einat added the comment: Ido, I don't see why this should be closed. The suggestion is good and the PR is good. I'm only waiting for the CLA signing to be worked through to merge the PR. -- ___ Python tracker

[issue26730] SpooledTemporaryFile rollover corrupts data silently when Unicode characters are written

Inada Naoki added the comment: New changeset e65b3fa9f16537d20f5f37c25673ac899fcd7099 by Inada Naoki in branch '3.7': bpo-26730: Fix SpooledTemporaryFile data corruption (GH-17400) https://github.com/python/cpython/commit/e65b3fa9f16537d20f5f37c25673ac899fcd7099 --

[issue26730] SpooledTemporaryFile rollover corrupts data silently when Unicode characters are written

miss-islington added the comment: New changeset d21b8e82dda3caf0989bb39bc0e0ce2bfef97081 by Miss Islington (bot) in branch '3.8': bpo-26730: Fix SpooledTemporaryFile data corruption (GH-17400) https://github.com/python/cpython/commit/d21b8e82dda3caf0989bb39bc0e0ce2bfef97081 --

[issue38524] functools.cached_property is not supported for setattr

Change by miss-islington : -- pull_requests: +16892 pull_request: https://github.com/python/cpython/pull/17412 ___ Python tracker ___

[issue38524] functools.cached_property is not supported for setattr

Change by miss-islington : -- pull_requests: +16891 pull_request: https://github.com/python/cpython/pull/17411 ___ Python tracker ___

[issue38524] functools.cached_property is not supported for setattr

Tal Einat added the comment: New changeset 02519f75d15b063914a11351da30178ca4ceb54b by Tal Einat in branch 'master': bpo-38524: clarify example a bit and improve formatting (GH-17406) https://github.com/python/cpython/commit/02519f75d15b063914a11351da30178ca4ceb54b --

[issue38932] unittest.mock.Mock.reset_mocks does not pass all arguments to its children

Karthikeyan Singaravelan added the comment: Thanks Vegard for the report. The docs say "Child mocks and the return value mock (if any) are reset as well." so it makes sense to me to reset the return_value and side_effect of children. But as mentioned in the PR it's a behaviour change that

[issue38930] Subprocess failed to kill child process after timeout when using with statement

Xuan Hu added the comment: Seems it is a false negative report. Close it temporarily. -- stage: -> resolved status: open -> closed ___ Python tracker ___

[issue38934] Dictionaries of dictionaries behave incorrectly when created from dict.fromkeys()

Josh Rosenberg added the comment: That's the expected behavior, and it's clearly documented here: https://docs.python.org/3/library/stdtypes.html#dict.fromkeys Quote: "All of the values refer to just a single instance, so it generally doesn’t make sense for value to be a mutable object such

[issue38934] Dictionaries of dictionaries behave incorrectly when created from dict.fromkeys()

sourya varenya added the comment: Here's a sample run for reproducibility: --- Python 3.6.9(Ubuntu 18.04) & 3.7.4(Windows) --- >>> a = {1:{5:8},2:{5:8}} >>> b = dict.fromkeys([1,2],{5:8}) >>> a {1: {5: 8}, 2: {5: 8}} >>> b {1: {5: 8}, 2: {5: 8}} >>> a[1].update({6:9}) >>>

[issue38934] Dictionaries of dictionaries behave incorrectly when created from dict.fromkeys()

New submission from sourya varenya : Here's a sample run for reproducibility: --- Python 3.6.9(Ubuntu 18.04) & 3.7.4(Windows) --- >>> a = {1:{5:8},2:{5:8}}

[issue38932] unittest.mock.Mock.reset_mocks does not pass all arguments to its children

Change by Karthikeyan Singaravelan : -- nosy: +xtreak ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38928] EnvBuilder.upgrade_dependencies() does not exist on 3.8

Change by Tzu-ping Chung : -- pull_requests: +16890 pull_request: https://github.com/python/cpython/pull/17410 ___ Python tracker ___

[issue38817] Immutable types inplace operations work incorrect in async

Ayush Mahajan added the comment: Can I work on this issue? -- nosy: +ay2306 ___ Python tracker ___ ___ Python-bugs-list mailing

[issue38933] unusual behaviour on list of dependable lambdas

Alexey Burdin added the comment: x=[2,3] [f(x) for f in [(lambda a:a[i]) for i in [0,1]]] #the expected output is [2,3] but actual is [3,3] [f(x) for f in [lambda a:a[0],lambda a:a[1]]] #results [2,3] normally -- ___ Python tracker

[issue38933] unusual behaviour on list of dependable lambdas

New submission from Alexey Burdin : >>> x=[2,3] >>> [f(x) for f in [(lambda a:a[i]) for i in [0,1]]] [3, 3] >>> [f(x) for f in [lambda a:a[0],lambda a:a[1]]] [2, 3] -- components: Interpreter Core messages: 357586 nosy: Alexey Burdin priority: normal severity: normal status: open

[issue38932] unittest.mock.Mock.reset_mocks does not pass all arguments to its children

Change by Vegard Stikbakke : -- keywords: +patch pull_requests: +16889 stage: -> patch review pull_request: https://github.com/python/cpython/pull/17409 ___ Python tracker

[issue38932] unittest.mock.Mock.reset_mocks does not pass all arguments to its children

Change by Vegard Stikbakke : -- versions: -Python 3.7 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38927] venv --upgrade_deps fails on Windows

Change by Vinay Sajip : -- resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker ___ ___

[issue38927] venv --upgrade_deps fails on Windows

Vinay Sajip added the comment: New changeset d9aa216d49423d58e192cd7a25016f90fe771ce7 by Vinay Sajip (Tzu-ping Chung) in branch 'master': bpo-38927: Use python -m pip to upgrade venv deps (GH-17403) https://github.com/python/cpython/commit/d9aa216d49423d58e192cd7a25016f90fe771ce7

[issue38928] EnvBuilder.upgrade_dependencies() does not exist on 3.8

Vinay Sajip added the comment: New changeset 045d4e243d042638bbbc9479d4f85f6f579ac3ca by Vinay Sajip (Tzu-ping Chung) in branch 'master': bpo-38928: Fix versionadded for venv's upgrade_deps function (GH-17404) https://github.com/python/cpython/commit/045d4e243d042638bbbc9479d4f85f6f579ac3ca

[issue35003] Provide an option to venv to put files in a bin/ directory on Windows

Vinay Sajip added the comment: The problem of bin over Scripts is that IIRC Scripts is baked-in in Windows, not just for venvs (e.g. a standard Python installation puts stuff in Scripts). So venv just sticks with the platform convention. -- ___

[issue38932] unittest.mock.Mock.reset_mocks does not pass all arguments to its children

Vegard Stikbakke added the comment: I said MagicMock, but I meant Mock. -- ___ Python tracker ___ ___ Python-bugs-list mailing

[issue38932] unittest.mock.Mock.reset_mocks does not pass all arguments to its children

Change by Vegard Stikbakke : -- title: MagicMock.reset_mocks does not pass all arguments to its children -> unittest.mock.Mock.reset_mocks does not pass all arguments to its children ___ Python tracker

[issue38932] MagicMock.reset_mocks does not pass all arguments to its children

New submission from Vegard Stikbakke : MagicMock, from unittest.mock, has a method reset_mock, which takes optional arguments return_value and side_effect, both with default values False. In the body of reset_mock, reset_mock is again called on all the _mock_children of of the MagicMock

[issue38462] Typo (nam ing) in import system docs

Roy Smith added the comment: Just for the archives: https://bugs.chromium.org/p/chromium/issues/detail?id=1022011 -- ___ Python tracker ___

[issue38079] _PyObject_VAR_SIZE should avoid arithmetic overflow

Change by Brett Cannon : -- nosy: -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue16079] list duplicate test names with patchcheck

Change by Brett Cannon : -- nosy: -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue11664] Add patch method to unittest.TestCase

Change by Brett Cannon : -- nosy: -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue7980] time.strptime not thread safe

Brett Cannon added the comment: As per Paul's suggestion, closing as "won't fix" as this only pertains to Python 2.7 and it will not be changing. -- resolution: -> wont fix stage: needs patch -> resolved status: open -> closed ___ Python tracker

[issue34309] Trouble when reloading extension modules.

Change by Brett Cannon : -- nosy: -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38569] Unknown distribution option: 'license_files'

Change by Brett Cannon : -- nosy: -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38593] Python 3.7 does not catch infinite recursion for some values of sys.getrecursionlimit()

Change by Brett Cannon : -- nosy: -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38649] tkinter messagebox is sloppy

Change by Brett Cannon : -- nosy: -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue32856] Optimize the `for y in [x]` idiom in comprehensions

Change by Brett Cannon : -- nosy: -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38021] pep425 tag for AIX is inadequate

Change by Brett Cannon : -- nosy: -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38021] pep425 tag for AIX is inadequate

Michael Felt added the comment: On 26/11/2019 20:10, Paul Moore wrote: > Paul Moore added the comment: > >> replacement platform_tag, not compatibility tag. > Ah, I see, sorry. In that case, this should be fine, it's purely a CPython > question. There's obviously a follow-on discussion about

[issue38931] pathlib.Path on Windows - parser issue

Zachary Ware added the comment: Note that you're using backslashes in a non-raw string; in particular, you're naming your file `\x09est.eps`. Try `Path(r'C:\Temp\MyProj.wc\test.eps')` and see if that works for you. -- ___ Python tracker

[issue38916] Remove array.fromstring

Brett Cannon added the comment: > there's no harm to keeping it (it's not broken) ... for now. :) There's always the risk that will change if we keep the code around. > The other deprecation in the array module says, "Deprecated since version > 3.3, will be removed in version 4.0".

[issue35003] Provide an option to venv to put files in a bin/ directory on Windows

Change by Brett Cannon : -- nosy: +vinay.sajip ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue35003] Provide an option to venv to put files in a bin/ directory on Windows

Change by Brett Cannon : -- versions: +Python 3.9 -Python 3.8 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38931] pathlib.Path on Windows - parser issue

Change by Brett Cannon : -- nosy: +brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38928] EnvBuilder.upgrade_dependencies() does not exist on 3.8

Change by Brett Cannon : -- nosy: +vinay.sajip ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38927] venv --upgrade_deps fails on Windows

Change by Brett Cannon : -- nosy: +vinay.sajip ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38924] pathlib paths .normalize()

Brett Cannon added the comment: Do note that Path inherits from PurePath, so providing a normalize() method on the latter means it will end up on the former. -- nosy: +brett.cannon ___ Python tracker

[issue38931] pathlib.Path on Windows - parser issue

New submission from tempest : the Path parser from pathlib seems to give incorrect paths if a folder (subdirectory) name includes a period. (This issue does not manifest with Unix paths.) Please see a demonstration below: "Out[2]" is not the same as "Out[3]" and "Out[4]"; the "\" separator

[issue38918] Add __module__ entry for function type in inspect docs table.

Change by Roundup Robot : -- keywords: +patch pull_requests: +16888 stage: needs patch -> patch review pull_request: https://github.com/python/cpython/pull/17408 ___ Python tracker

[issue37883] threading.Lock.locked is not documented

Ido Michael added the comment: Thanks, Tal, I think this one can be closed, I don't think I have permissions to close it -- ___ Python tracker ___

[issue38906] copy2 doesn't copy metadata on Windows and MacOS

Eryk Sun added the comment: > copystat() and copymode() should be able to copy the same > metadata/security-bits/etc as CopyFileExW. Regarding metadata, CopyFileExW copies the basic file info (i.e. FileAttributes, LastAccessTime, LastWriteTime, and ChangeTime). This metadata can be copied

[issue38270] Tests: Avoid MD5 or check for MD5 availablity

Petr Viktorin added the comment: The change silently disables 2 tests, see comment here: https://github.com/python/cpython/commit/66cd041df8dfadd001ae298292e16f0271c0d139#diff-ba7d7a4a1a0050e1f497b71b5cd50afcR365 (I think it's better to reopen this bug, than to open a new one, so all the

[issue26730] SpooledTemporaryFile rollover corrupts data silently when Unicode characters are written

Change by Inada Naoki : -- pull_requests: +16887 pull_request: https://github.com/python/cpython/pull/17407 ___ Python tracker ___

[issue38524] functools.cached_property is not supported for setattr

Change by Tal Einat : -- pull_requests: +16886 pull_request: https://github.com/python/cpython/pull/17406 ___ Python tracker ___

[issue26730] SpooledTemporaryFile rollover corrupts data silently when Unicode characters are written

Inada Naoki added the comment: New changeset ea9835c5d154ab6a54eed627958473b6768b28cc by Inada Naoki in branch 'master': bpo-26730: Fix SpooledTemporaryFile data corruption (GH-17400) https://github.com/python/cpython/commit/ea9835c5d154ab6a54eed627958473b6768b28cc --

[issue26730] SpooledTemporaryFile rollover corrupts data silently when Unicode characters are written

Change by miss-islington : -- pull_requests: +16885 pull_request: https://github.com/python/cpython/pull/17405 ___ Python tracker ___

[issue38929] Float // Integer doesn't give best result.

Steven D'Aprano added the comment: Although it often gets called "integer division", that's not actually what // does, it is actually *floor* division, as documented here: https://docs.python.org/3/library/stdtypes.html#numeric-types-int-float-complex So the behaviour as given is correct:

[issue38930] Subprocess failed to kill child process after timeout when using with statement

New submission from Xuan Hu : The original issue is that the `timeout` in `subprocess.run()` does not work properly, so I try to use `subprocess.Popen()` instead. There are two references I found, [1] is the implementation of `subprocess.run()` and [2] is the example for

[issue38929] Float // Integer doesn't give best result.

Serhiy Storchaka added the comment: To get 20.45 use the true division operator /. If float // int would return int, 1e300 // 2 would return a 300-digit integer. It takee more memory and its creation is slower than 5e299. In addition it does not make sense to provide such precision.

[issue38929] Float // Integer doesn't give best result.

New submission from Douglas Feather : 40.9//2 give 20.0 as a result. I would have expected one of: 20.45 or 20. If it is going to give an FP answer then it should do the division as FP and get the right answer. If it is going to do an integer division then it should give the division as

[issue38861] zipfile: Corrupts filenames containing non-UTF8 characters

Serhiy Storchaka added the comment: The standard requires interpreting filename encoding as cp470 or utf8. But for practical reasons it would be handy to allow to specify other encoding (which is not necessary equal ti the local filesystem encoding) . This is issue28080. But i left this

[issue38906] copy2 doesn't copy metadata on Windows and MacOS

Giampaolo Rodola' added the comment: If we use CopyFileExW in copy2(), then also copystat() and copymode() should be able to copy the same metadata/security-bits/etc as CopyFileExW. I don't know which Windows APIs should be used though. I sort of agree with Steven that CopyFileExW could be

[issue38928] EnvBuilder.upgrade_dependencies() does not exist on 3.8

Change by Tzu-ping Chung : -- keywords: +patch pull_requests: +16884 stage: -> patch review pull_request: https://github.com/python/cpython/pull/17404 ___ Python tracker ___

[issue38927] venv --upgrade_deps fails on Windows

Change by Tzu-ping Chung : -- keywords: +patch pull_requests: +16883 stage: -> patch review pull_request: https://github.com/python/cpython/pull/17403 ___ Python tracker ___

[issue38928] EnvBuilder.upgrade_dependencies() does not exist on 3.8

New submission from Tzu-ping Chung : The documentation says it is new in 3.8, but in reality it is not present until 3.9. https://docs.python.org/3/library/venv.html#venv.EnvBuilder.upgrade_dependencies -- assignee: docs@python components: Documentation messages: 357563 nosy:

[issue38927] venv --upgrade_deps fails on Windows

New submission from Tzu-ping Chung : https://github.com/python/cpython/commit/4acdbf11b1fae1af24c47413a6caa593010d1b6f EnvBuilder.upgrade_dependencies() uses `pip.exe install -U` to upgrade pip, which fails on Windows with `[WinError 5] Access is denied`. -- components: Library

[issue38524] functools.cached_property is not supported for setattr

miss-islington added the comment: New changeset 0f9c9d53283420a570850aa92869d032b40d4fba by Miss Islington (bot) in branch '3.8': bpo-38524: document implicit and explicit calling of descriptors' __set_name__ (GH-17364)

[issue38524] functools.cached_property is not supported for setattr

miss-islington added the comment: New changeset cd27d22ac90a869dc740004597246f24246348a6 by Miss Islington (bot) in branch '3.7': bpo-38524: document implicit and explicit calling of descriptors' __set_name__ (GH-17364)

[issue38524] functools.cached_property is not supported for setattr

Change by miss-islington : -- pull_requests: +16882 pull_request: https://github.com/python/cpython/pull/17402 ___ Python tracker ___

[issue38524] functools.cached_property is not supported for setattr

Change by miss-islington : -- pull_requests: +16881 pull_request: https://github.com/python/cpython/pull/17401 ___ Python tracker ___

[issue38524] functools.cached_property is not supported for setattr

Tal Einat added the comment: New changeset 1bddf890e595a865414645c6041733043c4081f8 by Tal Einat (Florian Dahlitz) in branch 'master': bpo-38524: document implicit and explicit calling of descriptors' __set_name__ (GH-17364)