[issue38964] Output of syntax error in f-string contains wrong filename

New submission from Erik Cederstrand : When I have a normal syntax error in a file, Python reports the filename in the exception output: $ cat syntax_error.py 0x=5 $ python3.8 syntax_error.py File "syntax_error.py", line 1 0x=5 ^ SyntaxError: invalid hexadecimal literal But if

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

New submission from Martin Liška : The test-case is stuck after update to GCC 10. I've got a patch for that. -- messages: 357778 nosy: Martin Liška priority: normal severity: normal status: open title: test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10 _

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

Change by Martin Liška : -- keywords: +patch pull_requests: +16942 stage: -> patch review pull_request: https://github.com/python/cpython/pull/17462 ___ Python tracker ___

[issue38966] List similarity relationship

New submission from Pranav Pandya : When list is initialized and equated to give the same value as list1=list2=[], then post initialization list1 & list2 are taken as same values and any changes in list2 are changed in list 1 and so on. Thus during initialization if lists are equated, they a

[issue38964] Output of syntax error in f-string contains wrong filename

Erik Cederstrand added the comment: Additionally, the output in the 2nd example does not contain the helpful text printing the context and location of the code containing the syntax error. -- ___ Python tracker

[issue38964] Output of syntax error in f-string contains wrong filename

Change by Karthikeyan Singaravelan : -- nosy: +eric.smith ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: htt

[issue38966] List similarity relationship

Karthikeyan Singaravelan added the comment: This is same as doing the below with list1 getting a reference of list2. Assignments in Python don't copy the value but make a reference. This is not an issue specific to IDLE as tagged and has the same behaviour under a normal REPL. https://docs.p

[issue38967] Improve error message in enum.py for python 3.5

Change by Rubén Jesús García Hernández : -- type: -> enhancement ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscrib

[issue38967] Improve error message in enum.py for python 3.5

New submission from Rubén Jesús García Hernández : I changed the '_names_ are reserved for future Enum use' line to be more user-friendly thus: 'Names surrounded by underscore (such as "%s") are reserved for future Enum use' % key The current message can be interpreted as the literal string _

[issue38967] Improve error message in enum for member name surrounded by underscore.

Karthikeyan Singaravelan added the comment: Error message changes in code are normally not backported to older versions so I have changed the subject accordingly and tagged 3.9. Thanks. -- assignee: docs@python -> components: +Library (Lib) -Documentation nosy: +xtreak title: Improve

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

Change by Karthikeyan Singaravelan : -- components: +Tests nosy: +vstinner type: -> behavior ___ Python tracker ___ ___ Python-bugs

[issue38962] Reference leaks in subinterpreters

STINNER Victor added the comment: New changeset 24f5cac7254177a4c9956d680c0a9b6dadd85c6f by Victor Stinner (Pablo Galindo) in branch 'master': bpo-38962: Fix reference leak in test_httpservers (GH-17454) https://github.com/python/cpython/commit/24f5cac7254177a4c9956d680c0a9b6dadd85c6f -

[issue38863] Improve is_cgi() in http.server

STINNER Victor added the comment: The change introduced a reference leak, see bpo-38962. Pablo fixed it: commit 24f5cac7254177a4c9956d680c0a9b6dadd85c6f (HEAD -> master, upstream/master) Author: Pablo Galindo Date: Wed Dec 4 09:29:10 2019 + bpo-38962: Fix reference leak in test_ht

[issue33684] parse failed for mutibytes characters, encode will show in \xxx

Inada Naoki added the comment: New changeset 808769f3a4cbdc47cf1a5708dd61b1787bb192d4 by Inada Naoki in branch 'master': bpo-33684: json.tool: Use utf-8 for infile and outfile. (GH-17460) https://github.com/python/cpython/commit/808769f3a4cbdc47cf1a5708dd61b1787bb192d4 -- nosy: +ina

[issue33684] parse failed for mutibytes characters, encode will show in \xxx

Change by miss-islington : -- pull_requests: +16943 pull_request: https://github.com/python/cpython/pull/17464 ___ Python tracker ___ __

[issue38863] Improve is_cgi() in http.server

Andrew Svetlov added the comment: Thanks, Pablo! -- ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://

[issue38962] Reference leaks in subinterpreters

STINNER Victor added the comment: """ 5 tests failed again: test__xxsubinterpreters test_atexit test_capi test_httpservers test_threading """ I merged Pablo's fix for test_httpservers. With PR 17457 + PR 17453 (and the test_httpservers fix), the 5 tests don't leak anymore. I am fine

[issue33684] parse failed for mutibytes characters, encode will show in \xxx

miss-islington added the comment: New changeset a75cad440ab50d823af5f06e51dfed3a319f1e8c by Miss Islington (bot) in branch '3.8': bpo-33684: json.tool: Use utf-8 for infile and outfile. (GH-17460) https://github.com/python/cpython/commit/a75cad440ab50d823af5f06e51dfed3a319f1e8c -- n

[issue38863] Improve is_cgi() in http.server

Siwon Kang added the comment: Obviously, I should have taken back what I added to cgi_directories. Thank you Pablo and Victor! -- ___ Python tracker ___ _

[issue33684] parse failed for mutibytes characters, encode will show in \xxx

Change by Inada Naoki : -- pull_requests: +16944 pull_request: https://github.com/python/cpython/pull/17465 ___ Python tracker ___ _

[issue33684] parse failed for mutibytes characters, encode will show in \xxx

Inada Naoki added the comment: New changeset e0f148e6635480521036415bd782c3424fe6c619 by Inada Naoki in branch '3.7': bpo-33684: json.tool: Use utf-8 for infile and outfile. (GH-17460) https://github.com/python/cpython/commit/e0f148e6635480521036415bd782c3424fe6c619 --

[issue33684] parse failed for mutibytes characters, encode will show in \xxx

Change by Inada Naoki : -- components: +Library (Lib) -Unicode ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue33684] parse failed for mutibytes characters, encode will show in \xxx

Change by Inada Naoki : -- resolution: -> fixed stage: patch review -> resolved status: open -> closed versions: +Python 3.7, Python 3.9 ___ Python tracker ___ ___

[issue38966] List similarity relationship

Change by Terry J. Reedy : -- assignee: terry.reedy -> resolution: -> not a bug stage: -> resolved status: open -> closed ___ Python tracker ___

[issue38815] test_ssl: test_min_max_version() fails on FreeBSD and Fedora

STINNER Victor added the comment: test_ssl still fails on FreeBSD: == FAIL: test_min_max_version (test.test_ssl.ContextTests) -- Traceback (most recent call l

[issue38962] Reference leaks in subinterpreters

miss-islington added the comment: New changeset b96c6b0723b889d3a0c1740bce7f579f33d246f2 by Miss Islington (bot) (Pablo Galindo) in branch 'master': bpo-38962: Fix reference leak in new_interpreter() (GH-17453) https://github.com/python/cpython/commit/b96c6b0723b889d3a0c1740bce7f579f33d246f2

[issue38968] int method works improperly

Change by Riccardo La Marca : -- files: Schermata 2019-12-04 alle 12.09.36.png nosy: Riccardo La Marca priority: normal severity: normal status: open title: int method works improperly versions: Python 3.8 Added file: https://bugs.python.org/file48755/Schermata 2019-12-04 alle 12.09.36

[issue38815] test_ssl: test_min_max_version() fails on FreeBSD and Fedora

Kubilay Kocak added the comment: In case it's relevant, I note the following: The ssl module is built with -I/usr/local/include in the compile line. Leaving aside: - the warts of the build system, and - the lack of specific --with-foo= semantics to allow providing well(narrowly)-scoped i

[issue38968] int method works improperly

Change by Riccardo La Marca : Removed file: https://bugs.python.org/file48755/Schermata 2019-12-04 alle 12.09.36.png ___ Python tracker ___ ___

[issue36854] GC operates out of global runtime state.

STINNER Victor added the comment: Victor> I'm not fully happy with this solution Eric> Should we have an issue open for finding a better solution? Are there risks with what you did that we don't want long-term? Pablo made a small changes in my workaround, by calling _PyGC_CollectNoFail() a

[issue36854] GC operates out of global runtime state.

STINNER Victor added the comment: Eric: """ Thanks so much for getting this done, Victor! Did I mention that you're my hero? :) """ You're welcome. I'm a believer that subinterpreters is one of the most realistic solution to make Python faster. I said it in my EuroPython keynote on CPython p

[issue38968] int method works improperly

Change by Riccardo La Marca : Added file: https://bugs.python.org/file48756/Code.png ___ Python tracker ___ ___ Python-bugs-list mailing lis

[issue38968] int method works improperly

New submission from Serhiy Storchaka : Please provide any details. What methods and why do you think they do not work properly. -- nosy: +serhiy.storchaka ___ Python tracker _

[issue38968] int method works improperly

Steven D'Aprano added the comment: Hi Riccardo, In the future, would you mind not posting screenshots of code or errors? Rather, copy and paste the text. That makes it easier for others to replicate the error, and also allows visually impaired and blind people using screen leaders. Otherwi

[issue38968] int method works improperly

Steven D'Aprano added the comment: You can read more here: https://docs.python.org/3/tutorial/floatingpoint.html https://docs.python.org/3/faq/design.html#why-are-floating-point-calculations-so-inaccurate -- ___ Python tracker

[issue38962] Reference leaks in subinterpreters

miss-islington added the comment: New changeset ac0e1c2694bc199dbd073312145e3c09bee52cc4 by Miss Islington (bot) (Pablo Galindo) in branch 'master': bpo-38962: Fix reference leak in the per-subinterpreter gc (GH-17457) https://github.com/python/cpython/commit/ac0e1c2694bc199dbd073312145e3c09b

[issue38964] Output of syntax error in f-string contains wrong filename

Batuhan added the comment: This is actually specified behavior in PEP 498 https://www.python.org/dev/peps/pep-0498/#expression-evaluation > Expressions are parsed with the equivalent of ast.parse('(' + expression + > ')', '', 'eval') -- nosy: +BTaskaya

[issue31821] pause_reading() doesn't work from connection_made()

Change by STINNER Victor : -- nosy: -vstinner ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.p

[issue38962] Reference leaks in subinterpreters

STINNER Victor added the comment: The 5 tests don't leak anymore, I close thee issue. Thanks Pablo! $ ./python -m test -R 3:3 -j0 test__xxsubinterpreters test_atexit test_capi test_httpservers test_threading (...) Total duration: 1 min 2 sec Tests result: SUCCESS -- resolution: -> f

[issue38969] The "int" method doesn't work correctly for long numbers with some decimal places.

New submission from Riccardo La Marca : PyDev console: starting. Python 3.8.0 (v3.8.0:fa919fdf25, Oct 14 2019, 10:23:27) [Clang 6.0 (clang-600.0.57)] on darwin >>> int(123456789012345678901234567890) 123456789012345678901234567890 >>> int(123456789012345678901234567890.76) 12345678901234567787

[issue38969] The "int" method doesn't work correctly for long numbers with some decimal places.

Change by Serhiy Storchaka : -- resolution: -> duplicate stage: -> resolved status: open -> closed superseder: -> int method works improperly ___ Python tracker ___

[issue38964] Output of syntax error in f-string contains wrong filename

Pablo Galindo Salgado added the comment: Although Batuhan is correct maybe we can consider trying to improve the debugging experience off-strings due to the fact that these errors in a big project may be difficult to find. Although you have always the back-trace on the other side. -

[issue38964] Output of syntax error in f-string contains wrong filename

Change by Pablo Galindo Salgado : -- resolution: fixed -> status: closed -> open ___ Python tracker ___ ___ Python-bugs-list mailin

[issue38964] Output of syntax error in f-string contains wrong filename

Eric V. Smith added the comment: I agree that although the PEP says that's how it behaves, that shouldn't be prescriptive of the error message. Clearly we can be more helpful here. I have a large, elaborate re-write of the error generating code that I've been working on, on and off for over

[issue38964] Output of syntax error in f-string contains wrong filename

Change by Eric V. Smith : -- assignee: -> eric.smith stage: resolved -> ___ Python tracker ___ ___ Python-bugs-list mailing list U

[issue38964] Output of syntax error in f-string contains wrong filename

Pablo Galindo Salgado added the comment: > Additionally, the idea of moving f-strings into the Python grammar would also > fix this problem. That might be a better way forward, although it has a > number of downsides, too. For considerin this path we would need to wait to see first the futur

[issue38970] [PDB] NameError in list comprehension in PDB

New submission from castix : Related to https://bugs.python.org/issue27316 This code works from the repl: Python 3.7.4 (default, Oct 4 2019, 06:57:26) [GCC 9.2.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import pdb; pdb.set_trace() --Return-- > (1)()

[issue38634] Symbol resolution conflict when embeding python in an application using libedit

STINNER Victor added the comment: New changeset 7105319ada2e663659020cbe9fdf7ff38f421ab2 by Victor Stinner (serge-sans-paille) in branch 'master': bpo-38634: Allow non-apple build to cope with libedit (GH-16986) https://github.com/python/cpython/commit/7105319ada2e663659020cbe9fdf7ff38f421ab

[issue38634] Symbol resolution conflict when embeding python in an application using libedit

Change by miss-islington : -- pull_requests: +16945 pull_request: https://github.com/python/cpython/pull/17466 ___ Python tracker ___ __

[issue38634] Symbol resolution conflict when embeding python in an application using libedit

Change by STINNER Victor : -- components: +Library (Lib) versions: +Python 3.8, Python 3.9 ___ Python tracker ___ ___ Python-bugs-li

[issue37604] warnings should use a ContextVar to manage filters/registry

Eric Wieser added the comment: A relevant old issue is https://bugs.python.org/issue6647 -- components: +Library (Lib) nosy: +Eric Wieser type: -> behavior ___ Python tracker ___

[issue38634] Symbol resolution conflict when embeding python in an application using libedit

miss-islington added the comment: New changeset 68669ef7883ea6338ca441e50f4f9d975f54d017 by Miss Islington (bot) in branch '3.8': bpo-38634: Allow non-apple build to cope with libedit (GH-16986) https://github.com/python/cpython/commit/68669ef7883ea6338ca441e50f4f9d975f54d017 -- nos

[issue38971] codecs.open leaks file descriptor when invalid encoding is passed

New submission from Brock Mendel : xref https://github.com/pandas-dev/pandas/pull/30034 codecs.open does `file = open(...)` before validating the encoding kwarg, leaving the open file behind if that validation raises. -- messages: 357811 nosy: Brock Mendel priority: normal severity: n

[issue38971] codecs.open leaks file descriptor when invalid encoding is passed

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

[issue38971] codecs.open leaks file descriptor when invalid encoding is passed

Karthikeyan Singaravelan added the comment: Does using with block similar to https://bugs.python.org/issue22831 solve this problem? -- nosy: +serhiy.storchaka ___ Python tracker

[issue38634] Symbol resolution conflict when embeding python in an application using libedit

STINNER Victor added the comment: Thanks serge-sans-paille for the bug report and the fix! I backported it to 3.8 since it could be automated, but I don't think that it's worth it to backport it to 3.7: https://github.com/python/cpython/pull/16986#issuecomment-561711232 -- resolution

[issue38971] codecs.open leaks file descriptor when invalid encoding is passed

Brock Mendel added the comment: > Does using with block similar to https://bugs.python.org/issue22831 solve > this problem? The motivating use case uses `with codecs.open(buf, "w", encoding=encoding) as f:` https://github.com/pandas-dev/pandas/blob/master/pandas/io/formats/format.py#L498 -

[issue38971] codecs.open leaks file descriptor when invalid encoding is passed

Karthikeyan Singaravelan added the comment: Ah okay, thanks for the detail. Forgot there should be an open file handle to be returned by codecs.open -- ___ Python tracker ___

[issue38972] Link to instructions to change PowerShell execution policy for venv activation

New submission from Brett Cannon : It would probably be good to add a note in the venv docs about execution policies, why it needs to change for environment activation, and how to do it -- especially now that we sign Activate.ps1 -- so there's less of a chance of people being caught off-guard

[issue38973] Shared Memory List Returns 0 Length

New submission from Derek Frombach : When accessing Shared Memory Lists, occasionally the shared memory list will have a length of zero for only one line of code. Even know the length of the list is constant and greater than zero, when accessing this list, like say sml[0], python returns a Va

[issue38971] codecs.open leaks file descriptor when invalid encoding is passed

Serhiy Storchaka added the comment: Add try: ... except: file.close() raise -- components: +IO, Library (Lib) keywords: +easy stage: -> needs patch type: -> resource usage versions: +Python 2.7, Python 3.7, Python 3.8, Python 3.9

[issue38974] using filedialog.askopenfilename() freezes python 3.8

New submission from Daniel Preston : I am using Tkinter in my program, and at a point I use a button to open a file by running a function with the following code: def UploadAction(event=None): global filename filename = filedialog.askopenfilename() filename = [filename] return fi

[issue38974] using filedialog.askopenfilename() freezes python 3.8

Paul Moore added the comment: Can you provide a minimal, self-contained, example of a program that demonstrates this behaviour in 3.8, but works in 3.7. It's not really possible to determine what the issue might be without a means of reproducing the problem. -- components: +Tkinter -

[issue38974] using filedialog.askopenfilename() freezes python 3.8

Change by Paul Moore : -- nosy: +gpolo, serhiy.storchaka ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: http

[issue38964] Output of syntax error in f-string contains wrong filename

Eric V. Smith added the comment: Yes, moving f-strings to the grammar would be a huge change, and not just for CPython. I discussed it at the last PyCon with the authors of various editors (for syntax highlighting) and other tools that parse python code. No one was hugely opposed to it, and

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

Change by STINNER Victor : -- pull_requests: +16946 pull_request: https://github.com/python/cpython/pull/17467 ___ Python tracker ___ __

[issue38974] using filedialog.askopenfilename() freezes python 3.8

Matthew Barnett added the comment: I've just tried it on Windows 10 with Python 3.8 64-bit and Python 3.8 32-bit without issue. -- nosy: +mrabarnett ___ Python tracker ___ __

[issue38974] using filedialog.askopenfilename() freezes python 3.8

Daniel Preston added the comment: Just tried to do that and found out that IDLE also crashes when opening a new python file, not just when using that code. Maybe it's a problem just with my computer? I am running python on Windows with an AMD Ryzen 5 processor with 8GB RAM if it helps.

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

STINNER Victor added the comment: New changeset 8b787964e0a647caa0558b7c29ae501470d727d9 by Victor Stinner in branch 'master': bpo-38965: Fix faulthandler._stack_overflow() on GCC 10 (GH-17467) https://github.com/python/cpython/commit/8b787964e0a647caa0558b7c29ae501470d727d9 -- mess

[issue38974] using tkinter.filedialog.askopenfilename() freezes python 3.8

Change by Brett Cannon : -- title: using filedialog.askopenfilename() freezes python 3.8 -> using tkinter.filedialog.askopenfilename() freezes python 3.8 ___ Python tracker __

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

Change by miss-islington : -- pull_requests: +16948 pull_request: https://github.com/python/cpython/pull/17469 ___ Python tracker ___ __

[issue38878] os.PathLike subclasshook causes subclass checks true on abstract implementation

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

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

STINNER Victor added the comment: Thanks Martin Liška for the bug report and your PR 17462! I chose to use volatile instead, since it's already the second time that we have to fix this function for a specific compiler. You abandonned your PR and confrmed that my PR fix your issue with GCC 10,

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

STINNER Victor added the comment: The cool thing is that GCC now also implements tail call optimization! -- ___ Python tracker ___

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

miss-islington added the comment: New changeset 5044c889dfced2f43e2cccb673d889a4882f6b3b by Miss Islington (bot) in branch '3.7': bpo-38965: Fix faulthandler._stack_overflow() on GCC 10 (GH-17467) https://github.com/python/cpython/commit/5044c889dfced2f43e2cccb673d889a4882f6b3b -- n

[issue38965] test_stack_overflow (test.test_faulthandler.FaultHandlerTests) is stuck with GCC10

miss-islington added the comment: New changeset f4a21d3b239bf4f4e4e2a8a5936b9b040645b246 by Miss Islington (bot) in branch '3.8': bpo-38965: Fix faulthandler._stack_overflow() on GCC 10 (GH-17467) https://github.com/python/cpython/commit/f4a21d3b239bf4f4e4e2a8a5936b9b040645b246 --

[issue38974] using tkinter.filedialog.askopenfilename() freezes python 3.8

Serhiy Storchaka added the comment: What is your OS? Is it macOS specific issue? -- ___ Python tracker ___ ___ Python-bugs-list mai

[issue38974] using tkinter.filedialog.askopenfilename() freezes python 3.8

Daniel Preston added the comment: No, it is an issue with Windows. I think it might only be a problem with my computer though, maybe the fact that I have an AMD processor might have something to do with the problem? -- ___ Python tracker

[issue38975] Add direct anchors to regex syntax documentation

New submission from Baptiste Mispelon : While writing documentation about regexps for a project I help maintain, I wanted to link to some specific aspects of Python's implementation (in my case, non-capturing groups) which are described on https://docs.python.org/3/library/re.html. There are

[issue38974] using tkinter.filedialog.askopenfilename() freezes python 3.8

Steve Dower added the comment: Processor type is far less likely than a shell extension. Do you have anything like DropBox/Tortoise???/etc. installed? -- ___ Python tracker _

[issue38975] Add direct anchors to regex syntax documentation

Change by Roundup Robot : -- keywords: +patch pull_requests: +16949 stage: -> patch review pull_request: https://github.com/python/cpython/pull/17470 ___ Python tracker ___ __

[issue38973] Shared Memory List Returns 0 Length

Andrew Svetlov added the comment: As I see, the problem is not related to asyncio at all. -- components: -asyncio ___ Python tracker ___ _

[issue38971] codecs.open leaks file descriptor when invalid encoding is passed

Josh Rosenberg added the comment: Any reason not to just defer opening the file until after the codec has been validated, so the resource acquisition comes last? -- nosy: +josh.r ___ Python tracker

[issue38972] Link to instructions to change PowerShell execution policy for venv activation

Brett Cannon added the comment: And where this has come up as an issue: https://github.com/microsoft/vscode-python/issues/2559. -- ___ Python tracker ___

[issue38698] While parsing email message id: UnboundLocalError

miss-islington added the comment: New changeset bb815499af855b1759c02535f8d7a9d0358e74e8 by Miss Islington (bot) (Claudiu Popa) in branch 'master': bpo-38698: Prevent UnboundLocalError to pop up in parse_message_id (GH-17277) https://github.com/python/cpython/commit/bb815499af855b1759c02535f8

[issue38976] Add support for HTTP Only flag in MozillaCookieJar

New submission from Jacob Taylor : This PR adds support for the HttpOnly flag as encoded in CURL cookiejars. This PR was mainly designed to allow the MozillaCookieJar to parse in the cookies, as previously they were considered comments and ignored. As HttpOnly is considered a non-standard at

[issue38976] Add support for HTTP Only flag in MozillaCookieJar

Change by Jacob Taylor : -- keywords: +patch pull_requests: +16951 stage: -> patch review pull_request: https://github.com/python/cpython/pull/17471 ___ Python tracker ___ ___

[issue38971] codecs.open leaks file descriptor when invalid encoding is passed

Serhiy Storchaka added the comment: Many reasons. 1. It is simpler. 2. We will need a try/except in any case to prevent a leak if an exception be raised by other code following open(). 3. It matches the behavior of io.open(). -- ___ Python tracker

[issue29298] argparse fails with required subparsers, un-named dest, and empty argv

Greg added the comment: while waiting for a fix, would it be possible to document in the argparse documentation that the 'dest' parameter is required (at least temporarily) for add_subparsers()? (somewhere near file:///usr/share/doc/python/html/library/argparse.html#sub-commands) gratuitou