[issue24666] Buffered I/O does not take file position into account when reading blocks

[CRYSTAL]

Change by CRYSTAL :


--
assignee:  -> docs@python
components: +2to3 (2.x to 3.x conversion tool), Build, Cross-Build, 
Documentation, Extension Modules, FreeBSD, Installation, Interpreter Core, 
Library (Lib), SSL, Tests, Unicode, ctypes
nosy: +Alex.Willmer, docs@python, ezio.melotti, koobs, vstinner

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[issue14074] argparse allows nargs>1 for positional arguments but doesn't allow metavar to be a tuple

[Raymond Hettinger]

Raymond Hettinger  added the comment:

-0 on going forward with this.  AFAICT, no one has requested tuple support (the 
OP just wanted better error handling).  And more fined grained control can 
already be had just by specifying separate positional arguments.

Paul suggested that it may be a better plan to just disallow tuple metavars and 
to give a better error message as the OP suggested.  That makes sense to me.

--
nosy: +rhettinger
priority: high -> normal

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[issue39298] add BLAKE3 to hashlib

[Larry Hastings]

Larry Hastings  added the comment:

I just tried it with clang, and uff-da!  2,737,446,868 bytes/sec!

p.s. I compiled with -O3 for both gcc and clang

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[issue22831] Use "with" to avoid possible fd leaks

[CRYSTAL]

Change by CRYSTAL :


--
components: +Build
nosy: +Hinsonlcrystal -Arfrever, berker.peksag, dstufft, eric.araujo, 
ezio.melotti, martin.panter, python-dev, rhettinger, serhiy.storchaka, vstinner
type: resource usage -> security
versions: +Python 3.9

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[issue39473] Enable import behavior consistency option

[DarkTrick]

New submission from DarkTrick :

Matter:

`import`s are not handled the same throughout the different ways of calling.


Current situation:
===
The resolution of `import` is dependant on the way of calling the script. 
Three ways of calling a script are shown below:
1) python myscript.py   # as script in cwd
2) python -m myscript   # as module in cwd
3) python -m src.myscript   # as module in subpackage of cwd

Given the following situation:

./src
|
|---main.py
||_
|| from subdir.funca import funcA  |
|| funca() |
||_|
|
|---subdir
  |
  |--- __init__.py
  |
  |--- funca.py
  |   |
  |   | from .funcb import funcB   |
  |   | def funcA():   |
  |   |funcb() |
  |   ||
  |
  |
  |--- funcb.py
  |
  | def funcB():   |
  |print("funcB")  |
  ||   

(A) The following call will succeed:
`./src>python -m main`

(B) The following call will succeed:
`./src>python main.py`

(C) The following call will succeed:
`./src>python -m subdir.funca

(D) The following call will not succeed:
`./src>python ./subdir/funca.py

(E) The following call will not succeed:
`./src/subdir>python funca.py


Suggestion:
===
Supply a functionality / an option that will allow all of A~E to succeed. 

S1) So it doesn't matter, if the script is called with or without the -m option 
(D)
S2) So a toplevel script can refer to the package it's placed in by ".", even 
if called direclty (E)


Implementation idea:
=
Problem: The current import logic can't be change for compatibility reasons. 
And maybe it should not. 
Therefore I thought of an option within the python script like
`Option treatAsModule`  
or
`Option relImports`

If such an option would be given, the python interpreter would handle imports 
differently.

--
components: Interpreter Core
messages: 360839
nosy: bluelantern
priority: normal
severity: normal
status: open
title: Enable import behavior consistency option
type: enhancement
versions: Python 3.9

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[issue39298] add BLAKE3 to hashlib

[Larry Hastings]

Larry Hastings  added the comment:

I gave it a go.  And yup, I see a definite improvement: it jumped from 
1,583,326,242 bytes/sec to 2,376,741,703 bytes/sec on my Intel laptop using 
AVX2.  A 50% improvement!

I also *think* I'm seeing a 10% improvement in ARM using NEON.  On my DE10-Nano 
board, BLAKE3 portable gets about 50mb/sec, and now BLAKE3 using NEON gets 
about 55mb/sec.  (Roughly.)  I might have goofed up on the old benchmarks 
though, or just not written down the final correct numbers.

I observed no statistically significant performance change in the no-SIMD 
builds on Intel and ARM.

p.s. in my previous comment with that table of benchmarks I said "mb/sec".  I 
meant "bytes/sec".  Oops!

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[issue21696] Idle: test configuration files

[Terry J. Reedy]

Terry J. Reedy  added the comment:

The issue is obsolete with respect to the minimal test implied by the opening 
message.  At least two tests (added since this was written) read the .def files.

Some of the proposed tests are, now at least, redundant  For boolean tests like
self.assertIn(get('editor-on-startup', 'bool'), (True, False))
a non-boolean value results in a Warning (treated like error), the assert, and 
remaining tests are skipped, and IDLD hangs.  Stripping strings should not be 
needed.

Some of the tests should be part of a startup check of default *and* user 
options.  Values should also be checked when changed (they mostly are).

Since new options have been added, some tests are missing.

I would like to have a 3-layer option map that can be used for both runtime 
change and the test suite.

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[issue36018] Add a Normal Distribution class to the statistics module

[Raymond Hettinger]

Raymond Hettinger  added the comment:


New changeset 41f4dc3bcf30cb8362a062a26818311c704ea89f by Raymond Hettinger 
(Miss Islington (bot)) in branch '3.8':
bpo-36018: Minor fixes to the NormalDist() examples and recipes. (GH-18226) 
(GH-18227)
https://github.com/python/cpython/commit/41f4dc3bcf30cb8362a062a26818311c704ea89f


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[issue38644] Pass explicitly tstate to function calls

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 61f4db8c56ca4b7e60050d96ecc255cfb03d92a0 by Victor Stinner in 
branch 'master':
bpo-38644: Pass tstate in ceval.c (GH-18222)
https://github.com/python/cpython/commit/61f4db8c56ca4b7e60050d96ecc255cfb03d92a0


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[issue36018] Add a Normal Distribution class to the statistics module

[miss-islington]

Change by miss-islington :


--
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pull_request: https://github.com/python/cpython/pull/18227

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[issue36018] Add a Normal Distribution class to the statistics module

[Raymond Hettinger]

Raymond Hettinger  added the comment:


New changeset 01bf2196d842fc20667c5336e0a7a77eb4fdc25c by Raymond Hettinger in 
branch 'master':
bpo-36018: Minor fixes to the NormalDist() examples and recipes. (GH-18226)
https://github.com/python/cpython/commit/01bf2196d842fc20667c5336e0a7a77eb4fdc25c


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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[STINNER Victor]

STINNER Victor  added the comment:

> I've added the files to the makefile and AMD64 Fedora Stable Clang Installed 
> 3.x was passing.

Thanks for the fix! I didn't notice that only "Installed" buildbot workers were 
impacted.

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[STINNER Victor]

STINNER Victor  added the comment:

commit 2528a6c3d0660c03ae43d796628462ccf8e58190
Author: Dino Viehland 
Date:   Mon Jan 27 14:04:56 2020 -0800

Add test.test_import.data.unwritable package to makefile (#18211)

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[issue39336] Immutable module type can't be used as package in custom loader

[STINNER Victor]

STINNER Victor  added the comment:

commit 2528a6c3d0660c03ae43d796628462ccf8e58190
Author: Dino Viehland 
Date:   Mon Jan 27 14:04:56 2020 -0800

Add test.test_import.data.unwritable package to makefile (#18211)

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[issue38605] [typing] PEP 563: Postponed evaluation of annotations: enable it by default before Python 4.0

[STINNER Victor]

STINNER Victor  added the comment:

I started a thread on typing-sig:
https://mail.python.org/archives/list/typing-...@python.org/thread/JG4IWHO3TZORNESR6ARXFL6OUZU2BEBX/

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[issue38797] x86-64 High Sierra 3.x buildbot worker fails to build Python: python.exe setup.py does crash with a bus error

[STINNER Victor]

STINNER Victor  added the comment:

High Sierra buildbot worker is gone.

--
resolution:  -> out of date
stage:  -> resolved
status: open -> closed

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[issue39413] Implement os.unsetenv() on Windows

[STINNER Victor]

Change by STINNER Victor :


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status: open -> closed

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[issue36018] Add a Normal Distribution class to the statistics module

[Raymond Hettinger]

Change by Raymond Hettinger :


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pull_request: https://github.com/python/cpython/pull/18226

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[issue39205] multiprocessing: Hang when interpreter exits after ProcessPoolExecutor.shutdown(wait=False)

[STINNER Victor]

Change by STINNER Victor :


--
title: Hang when interpreter exits after 
ProcessPoolExecutor.shutdown(wait=False) -> multiprocessing: Hang when 
interpreter exits after ProcessPoolExecutor.shutdown(wait=False)

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[issue39205] Hang when interpreter exits after ProcessPoolExecutor.shutdown(wait=False)

[Brian Quinlan]

Brian Quinlan  added the comment:


New changeset 884eb89d4a5cc8e023deaa65001dfa74a436694c by Brian Quinlan in 
branch 'master':
bpo-39205: Tests that highlight a hang on ProcessPoolExecutor shutdown (#18221)
https://github.com/python/cpython/commit/884eb89d4a5cc8e023deaa65001dfa74a436694c


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[issue39467] Allow to deprecate CLI arguments in argparse

[Raymond Hettinger]

Change by Raymond Hettinger :


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Removed message: https://bugs.python.org/msg360813

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[issue39467] Allow to deprecate CLI arguments in argparse

[Raymond Hettinger]

Raymond Hettinger  added the comment:

Will leave this open for a while so that many people can comment on the 
proposal before we act on it.

My initial take is:

* Having a way to deprecate seems useful.

* In practice, I haven't seen this done very much (in big tooling such as GCC 
perhaps, but everyday command-line tools don't seem to do this AFAICT).

* The warnings module is likely not the right implementation tool.  The 
warnings module doesn't make as much sense for CLIs as it does for libraries.  
In particular, the warnings module is all about the ability of consumer code to 
filter, ignore, or escalate warnings.  Also, we've so far been good about 
minimizing inter-module dependencies so that start-up time remains fast.

* The PR is aggressive in providing *deprecated*, *deprecated_reason*, and 
*deprecated_pending*.  Perhaps a simpler hook or flag would suffice.  The 
overall module API is already large enough to be a barrier to learning all the 
features.

* There is some question as to whether this belongs in argparse at all or 
whether it should be in downstream, post-parsing logic.  For example:

parser.add_argument('--throw', action='store_true',
 help = '(deprecated use "toss" instead) causes ball to move')
...
args = parser.parse_args()
if args.throw:
 print('"throw" has been deprecated, use "toss" instead',
   file=sys.stderr)

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[issue39390] shutil.copytree - 3.8 changed argument types of the ignore callback

[Giampaolo Rodola']

Change by Giampaolo Rodola' :


--
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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue39392] Python Turtle is not filling alternate overlapping areas of a shape with same color

[Terry J. Reedy]

Change by Terry J. Reedy :


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status: open -> closed

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[issue39392] Python Turtle is not filling alternate overlapping areas of a shape with same color

[miss-islington]

miss-islington  added the comment:


New changeset 005b0596326cf1b4f17e8d38bfc3887d4486e564 by Miss Islington (bot) 
in branch '3.7':
bpo-39392: Turtle overlap fill depends on OS (GH-18223)
https://github.com/python/cpython/commit/005b0596326cf1b4f17e8d38bfc3887d4486e564


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[issue39392] Python Turtle is not filling alternate overlapping areas of a shape with same color

[miss-islington]

miss-islington  added the comment:


New changeset b487a8ed5bd267d62a05c3cab7def6b1f36999ea by Miss Islington (bot) 
in branch '3.8':
bpo-39392: Turtle overlap fill depends on OS (GH-18223)
https://github.com/python/cpython/commit/b487a8ed5bd267d62a05c3cab7def6b1f36999ea


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[issue39390] shutil.copytree - 3.8 changed argument types of the ignore callback

[Giampaolo Rodola']

Giampaolo Rodola'  added the comment:


New changeset cf9d00554715febf21cf94950da4f42723b80498 by Giampaolo Rodola 
(mbarkhau) in branch '3.8':
[3.8] bpo-39390 shutil: fix argument types for ignore callback (GH-18122)
https://github.com/python/cpython/commit/cf9d00554715febf21cf94950da4f42723b80498


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[issue39392] Python Turtle is not filling alternate overlapping areas of a shape with same color

[miss-islington]

Change by miss-islington :


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pull_requests: +17605
pull_request: https://github.com/python/cpython/pull/18225

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[issue39392] Python Turtle is not filling alternate overlapping areas of a shape with same color

[miss-islington]

Change by miss-islington :


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pull_requests: +17604
pull_request: https://github.com/python/cpython/pull/18224

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[issue39392] Python Turtle is not filling alternate overlapping areas of a shape with same color

[Terry J. Reedy]

Terry J. Reedy  added the comment:


New changeset 2824c45a0a020f12f27da7e7162e8636c21bf869 by Terry Jan Reedy in 
branch 'master':
bpo-39392: Turtle overlap fill depends on OS (#18223)
https://github.com/python/cpython/commit/2824c45a0a020f12f27da7e7162e8636c21bf869


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[issue30780] IDLE: configdialog - add tests for ConfigDialog GUI.

[Terry J. Reedy]

Change by Terry J. Reedy :


--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.8, Python 3.9 -Python 3.6

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[issue31414] IDLE: Entry tests should delete before insert.

[Terry J. Reedy]

Change by Terry J. Reedy :


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stage: patch review -> resolved
status: open -> closed

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[issue31414] IDLE: Entry tests should delete before insert.

[Terry J. Reedy]

Terry J. Reedy  added the comment:

Opened #39472 for changes dialog itself.

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[issue39472] IDLE: improve handling of int entry in settings dialog

[Terry J. Reedy]

New submission from Terry J. Reedy :

Spinoff from #31414, about int entry fields.  It claims: Note: a deeper problem 
is attaching a tracer that get called with each keystroke.  Using a StringVar 
avoids the error when the entry is blanked, but currently allows non-ints to be 
saved.  A better solution would be to not do the auto tracing, but use a IntVar 
and only call var_changed when the user 'leaves' the box, after checking for a 
count in a sane range.

Verify claim and proposed solution.

--
assignee: terry.reedy
components: IDLE
messages: 360821
nosy: terry.reedy
priority: normal
severity: normal
stage: test needed
status: open
title: IDLE: improve handling of int entry in settings dialog
type: behavior
versions: Python 3.9

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[issue39392] Python Turtle is not filling alternate overlapping areas of a shape with same color

[Terry J. Reedy]

Change by Terry J. Reedy :


--
keywords: +patch
pull_requests: +17603
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/18223

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Dino Viehland]

Dino Viehland  added the comment:

I've added the files to the makefile and AMD64 Fedora Stable Clang Installed 
3.x was passing.

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status: open -> closed

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[issue39471] Meaning and clarification of PyBuffer_Release()

[Eric Wieser]

Change by Eric Wieser :


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[issue38644] Pass explicitly tstate to function calls

[STINNER Victor]

Change by STINNER Victor :


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pull_requests: +17602
pull_request: https://github.com/python/cpython/pull/18222

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[issue39391] Nondeterministic Pydoc output on functions that have functions as default parameters

[Peter O.]

Peter O.  added the comment:

No, the use case I have in mind is storing outputs of the pydoc3 program -- as 
is -- in version control systems such as Git (e.g., running a command like 
"pydoc3 mymodule > mymodule_doc.txt").  The pydoc3 output is not further parsed 
by programs, or even "tested".

For example, adding "#doctest: +ELLIPSIS" as in the following example does not 
solve the problem in the opening post:


def testfunc(a, m=d0): #doctest: +ELLIPSIS
   pass

--
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status: closed -> open

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[issue39471] Meaning and clarification of PyBuffer_Release()

[Sebastian Berg]

Sebastian Berg  added the comment:

I went through Python, `array` seems to not break the logic. pickling has a 
comment which specifically wants to run into the argument parsing corner case 
above (I am not sure that it is really important). However, 
`Modules/_testbuffer.c` (which is just test) actually does allocate new memory 
for the buffer!

I can be convinced that this is how it is supposed to be, but right now I am 
still not quite. The main idea is efficient no-copy data sharing. It is always 
possible to create a `to_memoryview()` method if a realloc was 
desired/necessary...

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[issue38631] Replace Py_FatalError() with regular Python exceptions

[STINNER Victor]

STINNER Victor  added the comment:

There are still around 122 calls to Py_FatalError() in the master branch. But 
remaining ones are the hardest to remove. I close the issue, it's already 
better than previously.

Compare this number to 285 calls in Python 3.6.

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status: open -> closed

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[issue30780] IDLE: configdialog - add tests for ConfigDialog GUI.

[miss-islington]

miss-islington  added the comment:


New changeset 7b57b15bd83879ee35f8758a84a7857a9968c145 by Miss Islington (bot) 
in branch '3.8':
bpo-30780: Add IDLE configdialog tests (GH-3592)
https://github.com/python/cpython/commit/7b57b15bd83879ee35f8758a84a7857a9968c145


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[issue30780] IDLE: configdialog - add tests for ConfigDialog GUI.

[miss-islington]

miss-islington  added the comment:


New changeset 5aefee6f989821c5dc36d10a9cfd083d7aa737a5 by Miss Islington (bot) 
in branch '3.7':
bpo-30780: Add IDLE configdialog tests (GH-3592)
https://github.com/python/cpython/commit/5aefee6f989821c5dc36d10a9cfd083d7aa737a5


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[issue39153] Clarify refcounting semantics of PyDict_SetItem[String]

[Joannah Nanjekye]

Change by Joannah Nanjekye :


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[issue38631] Replace Py_FatalError() with regular Python exceptions

[STINNER Victor]

STINNER Victor  added the comment:


New changeset d3a1de22705cc79d7e8a0f44c4f00255e58c8b20 by Victor Stinner in 
branch 'master':
bpo-38631: Avoid Py_FatalError() in _PyCodecRegistry_Init() (GH-18217)
https://github.com/python/cpython/commit/d3a1de22705cc79d7e8a0f44c4f00255e58c8b20


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[issue39471] Meaning and clarification of PyBuffer_Release()

[Sebastian Berg]

Sebastian Berg  added the comment:

Hmmm, it seems I had missed this chunk of PEP 3118 before:

> Exporters will need to define a bf_releasebuffer function if they can 
> re-allocate their memory, strides, shape, suboffsets, or format variables 
> which they might share through the struct bufferinfo.

Which reads like the opposite of what I would like to see, unfortunately. Which 
I guess means that the parsing issue should be addressed differently. Opinions 
still welcome, though.

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[issue39467] Allow to deprecate CLI arguments in argparse

[Raymond Hettinger]

Raymond Hettinger  added the comment:

Will leave this open for a while so that many people can comment on the 
proposal before we act on it.

My initial take is:

* Having a way to deprecate seems useful.

* In practice, I haven't seen this done very much (in big tooling such as GCC 
perhaps, but everyday command-line tools don't seem to do this AFAICT).

* The warnings module is likely not the right implementation tool.  The 
warnings module doesn't make as much sense for CLIs as it does for libraries.  
It particular, the warnings module is all about the ability of consumer code to 
filter, ignore, or escalate warnings.  Also, we've so far been good about 
minimizing inter-module dependencies so that start-up time remains fast.

* The PR is aggressive in providing *deprecated*, *deprecated_reason*, and 
*deprecated_pending*.  Perhaps a simpler hook or flag would suffice.  The 
overall module API is already large enough to be a barrier to learning all the 
features.

* There is some question as to whether this belongs in argparse at all or 
whether it should be in downstream, post-parsing logic.  For example:
 
args = parser.parse_args()
if args.throw:
 print('"throw" has been deprecated, use "toss" instead',
   file=sys.stderr)
..

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[issue39205] Hang when interpreter exits after ProcessPoolExecutor.shutdown(wait=False)

[Brian Quinlan]

Change by Brian Quinlan :


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[issue30780] IDLE: configdialog - add tests for ConfigDialog GUI.

[miss-islington]

Change by miss-islington :


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[issue38631] Replace Py_FatalError() with regular Python exceptions

[STINNER Victor]

STINNER Victor  added the comment:


New changeset a27831351873bd7eff10863353d475c29fb0d7bb by Victor Stinner in 
branch 'master':
bpo-38631: Avoid Py_FatalError() in PyCode_New() (GH-18215)
https://github.com/python/cpython/commit/a27831351873bd7eff10863353d475c29fb0d7bb


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[issue30780] IDLE: configdialog - add tests for ConfigDialog GUI.

[miss-islington]

Change by miss-islington :


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[issue30780] IDLE: configdialog - add tests for ConfigDialog GUI.

[Terry J. Reedy]

Terry J. Reedy  added the comment:


New changeset dd023ad1619b6f1ab313986e8953eea32c18f50c by Terry Jan Reedy 
(Cheryl Sabella) in branch 'master':
bpo-30780: Add IDLE configdialog tests (#3592)
https://github.com/python/cpython/commit/dd023ad1619b6f1ab313986e8953eea32c18f50c


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[issue39471] Meaning and clarification of PyBuffer_Release()

[Sebastian Berg]

New submission from Sebastian Berg :

The current documentation of ``PyBuffer_Release()`` and the PEP is a bit fuzzy 
about what the function can and cannot do.

When an object exposes the buffer interface, I believe it should always return 
a `view` (in NumPy speak) of its own data, i.e. the data exposed by the object 
is also owned by it directly.

On the other hand the buffer view _itself_ has fields such as `strides`, etc. 
which may need allocating.

In other words, I think `PyBuffer_Release()` should be documented to 
deallocate/invalidate the `Py_buffer`. But, it *must not* invalidate the actual 
memory it points to. If I copy all information out of the `Py_buffer` and then 
free it, the copy must still be valid.

I think this is the intention, but it is not spelled out clear enough, it is 
also the reason for the behaviour of the "#s", etc. keyword argument parsers 
failing due to the code:

if (pb != NULL && pb->bf_releasebuffer != NULL) {
*errmsg = "read-only bytes-like object";
return -1;
}

which in turn currently means NumPy decides to _not_ implement bf_releasebuffer 
at all (leading to very ugly work arounds).

I am happy to make a PR, if we can get to a point where everyone is absolutely 
certain that the above interpretation was always correct, we could clean up a 
lot of code inside NumPy as well!

--
components: C API
messages: 360809
nosy: seberg
priority: normal
severity: normal
status: open
title: Meaning and clarification of PyBuffer_Release()
type: behavior
versions: Python 2.7, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9

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[issue38631] Replace Py_FatalError() with regular Python exceptions

[STINNER Victor]

Change by STINNER Victor :


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[issue39470] Indicate that os.makedirs is equivalent to Path.mkdir

[Joannah Nanjekye]

Change by Joannah Nanjekye :


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[issue39470] Indicate that os.makedirs is equivalent to Path.mkdir

[Joannah Nanjekye]

New submission from Joannah Nanjekye :

:func:`os.makedirs` is equivalent to ``mkdir -p`` and :meth:`Path.mkdir()` when 
given an optional *exist_ok* argument.

--
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title: Indicate that os.makedirs is equivalent to Path.mkdir

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[issue38631] Replace Py_FatalError() with regular Python exceptions

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 47ee8a6063c22ec272fe7a2d95d12f7811ebb48b by Victor Stinner in 
branch 'master':
bpo-38631: Avoid Py_FatalError() in _memory_release() (GH-18214)
https://github.com/python/cpython/commit/47ee8a6063c22ec272fe7a2d95d12f7811ebb48b


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[issue38631] Replace Py_FatalError() with regular Python exceptions

[STINNER Victor]

STINNER Victor  added the comment:


New changeset a94c6b61aa5c09237b8105e5aee638cd54197b6f by Victor Stinner in 
branch 'master':
bpo-38631: Avoid Py_FatalError() in PyModule_Create2() (GH-18212)
https://github.com/python/cpython/commit/a94c6b61aa5c09237b8105e5aee638cd54197b6f


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[issue38631] Replace Py_FatalError() with regular Python exceptions

[STINNER Victor]

Change by STINNER Victor :


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[issue39430] tarfile.open(mode="r") race condition when importing lzma

[Ethan Furman]

Ethan Furman  added the comment:

Cool.  I appreciate all the work in this area, thank you!

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Ethan Furman]

Ethan Furman  added the comment:

The idea behind PEP 519 was to alleviate str(path_obj) calls between the 
os/program interface.  We can either make that as consistent as we can as we 
find places that still require the str(path_obj) idiom, or we can make users 
remember which ones do, and which ones don't, easily use a Path object.

In my opinion, having to remember is a very unpleasant and frustrating user 
experience.

Serhiy Storchaka:

> Path-like objects are now unintentionally accepted for many non-path
> things, like hostname in socket.sethostname() and username in
> os.initgroups(). I also think it was a mistake, and we should not
> make new mistakes.

There will always be ways for users to make mistakes when using API's.  Whether 
they passed a Path path to os.sethostname() or a string path to 
os.sethostbyname(), it's still their bug, and linters/type-checkers exist to 
help catch those kinds of bugs.

Brett Canon:
---
> Environment variables are strings, period, so they should be specified
> as such;

Out of curiosity, any idea how often non-strings are used to set os.environ, 
and so need explicit conversion?

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Eryk Sun]

Eryk Sun  added the comment:

> I honestly would have disagreed with the Popen change for its 'env' 
> argument or any other place that is dealing with environment
> variables

os.spawnve (Windows) and os.execve support __fspath__ for the env  dict 
partially due to me (bpo-28114), so sorry if that was the wrong decision. 
However, at least on the POSIX side, I was restoring previous behavior that 
aligned with POSIX os.putenv. An example of what's supported currently:

Windows:

>>> path = os.environ['comspec']
>>> argv = ['cmd', '/c', 'echo %SPAM%']
>>> env = os.environ.copy()
>>> env[Path('SPAM')] = Path('eggs')
>>> os.spawnve(0, path, argv, env)
eggs
0

POSIX:

>>> path = '/bin/bash'
>>> argv = ['bash', '-c', 'echo $SPAM']
>>> env = os.environ.copy()
>>> env[Path('SPAM')] = Path('eggs')
>>> os.spawnve(0, path, argv, env)
eggs
0

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[issue39282] python-config --embed documentation

[Joannah Nanjekye]

Joannah Nanjekye  added the comment:

Leaving this for @victor to decide since he is the PR author.

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[issue39248] test_distutils fails on PPC64 Fedora 3.x: /tmp/subprocess.py

[STINNER Victor]

STINNER Victor  added the comment:

The buildbot is back to green, thank you David :-)
https://buildbot.python.org/all/#/builders/8/builds/254

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[issue38631] Replace Py_FatalError() with regular Python exceptions

[STINNER Victor]

Change by STINNER Victor :


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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Path-like objects are now unintentionally accepted for many non-path things, 
like hostname in socket.sethostname() and username in os.initgroups(). I also 
think it was a mistake, and we should not make new mistakes.

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[issue39469] Support for relative home path in pyvenv.cfg

[Roundup Robot]

Change by Roundup Robot :


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pull_request: https://github.com/python/cpython/pull/18213

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[issue38631] Replace Py_FatalError() with regular Python exceptions

[STINNER Victor]

Change by STINNER Victor :


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[issue39469] Support for relative home path in pyvenv.cfg

[Jeff Edwards]

New submission from Jeff Edwards :

Currently, the interpreter only supports absolute paths for the 'home' 
directory in the pyvenv.cfg file.  While this works when the interpreter is 
always installed at a fixed location, it impacts the portability of virtual 
environments and can make it notably more-difficult if multiple virtual 
environments are shipped with a shared interpreter and are intended to be 
portable and working in any directory.

Many of these issues can be solved for if 'home' can use a directory relative 
to the directory of the pyvenv.cfg file.  This is detected by the presence of a 
starting '.' in the value.

A common use-case for this is that a script-based tool (e.g. black or 
supervisor) may be shipped with a larger portable application where they are 
intended to share the same interpreter (to save on deployment size), but may 
have conflicting dependencies.  Since the application only depends on the 
executable scripts, those packages could be packaged into  their own virtual 
environments with their dependencies.

--
components: Interpreter Core
messages: 360800
nosy: Jeff.Edwards
priority: normal
severity: normal
status: open
title: Support for relative home path in pyvenv.cfg
type: enhancement
versions: Python 3.9

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[STINNER Victor]

STINNER Victor  added the comment:

> I don't think this should be done (and I honestly would have disagreed with 
> the Popen change for its 'env' argument or any other place that is dealing 
> with environment variables). Environment variables are strings, period, so 
> they should be specified as such; explicit is better than implicit (and there 
> isn't enough pragmatic benefit to override this in my opinion).

I don't think that subprocess accepts fspath on purpose. It uses fsencode() 
because it's convenient to encode Unicode to the filesystem encoding using the 
right error handler.

It's a side effect of the commit c1cbeedf0c650c3f7c64f04479070d39e15e1baf. In 
fact, I'm opposed to this commit, but now it's too change to change it again :-)

os.putenv() is unrelated to os.environ. Calling os.putenv() does not update 
os.environ, whereas setting a key in os.environ calls internally os.putenv().

I like the idea of keeping os.environ as simple as a dict mapping strings to 
trings (in term of API, internally it's more complicated).

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Dino Viehland]

Change by Dino Viehland :


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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Dino Viehland]

Dino Viehland  added the comment:

Ahh, that's probably it Brett, I didn't know that was there, thanks!

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Brett Cannon]

Brett Cannon  added the comment:

Was the Makefile updated to install Lib/test/test_import/date/unwritable?

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Brett Cannon]

Brett Cannon  added the comment:

I don't think this should be done (and I honestly would have disagreed with the 
Popen change for its 'env' argument or any other place that is dealing with 
environment variables). Environment variables are strings, period, so they 
should be specified as such; explicit is better than implicit (and there isn't 
enough pragmatic benefit to override this in my opinion).

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[issue39468] .python_history write permission improvements

[SilentGhost]

SilentGhost  added the comment:

1. Your PR contains unrelated changes
2. Please test your code: submitting syntactically incorrect code just wastes 
everyone's time

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[issue39430] tarfile.open(mode="r") race condition when importing lzma

[Brett Cannon]

Brett Cannon  added the comment:

> When was this change made?

It has always been this way, so no change here. We have actually improved the 
situation over the years with attempts at better locking in importlib itself.

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[issue39468] .python_history write permission improvements

[Aurora]

Change by Aurora :


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[issue39468] .python_history write permission improvements

[Aurora]

Change by Aurora :


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[issue39468] .python_history write permission improvements

[Aurora]

Change by Aurora :


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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[STINNER Victor]

STINNER Victor  added the comment:

> AMD64 Fedora Stable Clang Installed 3.x:
> https://buildbot.python.org/all/#/builders/127/builds/212

So, I added effective uid/gid to pythoninfo, here you have:

os.getegid: 1000
os.geteuid: 1000
os.getgid: 1000
os.getgrouplist: 1000
os.getgroups: 1000
os.getresgid: (1000, 1000, 1000)
os.getresuid: (1000, 1000, 1000)
os.getuid: 1000

There is nothing related to root (uid 0).

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[issue39468] .python_history write permission improvements

[Aurora]

Aurora  added the comment:

https://github.com/opensource-assist/cpython/blob/opensource-assist-patch-sitepy-1/Lib/site.py

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[issue39468] .python_history write permission improvements

[Aurora]

New submission from Aurora :

On a typical Linux system, if you run 'chattr +i /home/user/.python_history', 
and then run python, then exit, the following error message will be printed out:
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site.py", line 446, in write_history
readline.write_history_file(history)
OSError: [Errno -1] Unknown error -1


With a simple improvement, the site module can check and suggest the user to 
run 'chattr -i' on the .python_history file.

Additionaly, I don't know if it's a good idea to automatically run 'chattr -i' 
in such a situation or not.

--
components: Library (Lib)
messages: 360790
nosy: opensource-assist
priority: normal
severity: normal
status: open
title: .python_history write permission improvements
type: enhancement
versions: Python 3.9

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Dino Viehland]

Dino Viehland  added the comment:

The curious thing about this is other tests in CircularImportTests are 
importing packages from test.test_import.data in the exact same way.

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Eryk Sun]

Eryk Sun  added the comment:

Supporting __fspath__ for os.environ[b] makes it consistent with POSIX 
os.putenv, which already supports it via PyUnicode_FSConverter. For example:

os.putenv(Path('spam'), Path('eggs'))
getenv = ctypes.CDLL('libc.so.6').getenv
getenv.restype = ctypes.c_char_p

>>> getenv(b'spam')
b'eggs'

For symmetry, os.putenv in Windows could be updated to support __fspath__. An 
old patch for bpo-28188 implements this, along with bytes support, via 
PyUnicode_FSDecoder. But bytes support would be limited to UTF-8 strings, so it 
wouldn't be as flexible as os.environb in POSIX, which supports arbitrary bytes 
except for embedded nulls.

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nosy: +eryksun

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[issue39467] Allow to deprecate CLI arguments in argparse

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan :


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nosy: +djarb, paul.j3, rhettinger -4383

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[issue39424] [easy] test_signal: test_pidfd_send_signal() uses deprecated assertRaisesRegexp() method

[Hakan]

Hakan  added the comment:

I want to work on this as my first contribution

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nosy: +hakancelik

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[issue39467] Allow to deprecate CLI arguments in argparse

[hervé]

Change by hervé :


--
keywords: +patch
pull_requests: +17585
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/18208

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[issue39467] Allow to deprecate CLI arguments in argparse

[hervé]

New submission from hervé :

Today it's not possible to deprecate CLI arguments designed with argparse, it 
could be useful to introduce deprecation feature in argparse to allow 
developers to inform their apps's users when an argument is planed to be 
removed in the future.

--
components: Library (Lib)
messages: 360786
nosy: 4383
priority: normal
severity: normal
status: open
title: Allow to deprecate CLI arguments in argparse
type: enhancement
versions: Python 3.9

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[issue39466] Spam

[Karthikeyan Singaravelan]

Karthikeyan Singaravelan  added the comment:

Thanks Zachary.

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[issue38610] use-after-free in list object function

[Dong-hee Na]

Change by Dong-hee Na :


--
versions: +Python 3.6

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[issue38610] use-after-free in list object function

[Dong-hee Na]

Change by Dong-hee Na :


--
pull_requests: +17584
pull_request: https://github.com/python/cpython/pull/18207

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Ethan Furman]

Ethan Furman  added the comment:

True, but this example of implicit conversion is only for Path objects which 
are currently implicitly converted throughout the stdlib where appropriate, and 
this looks like one of those appropriate places.

I don't know enough about os.environb to offer an opinion on auto-conversion 
there.

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[issue39248] test_distutils fails on PPC64 Fedora 3.x: /tmp/subprocess.py

[David Edelsohn]

David Edelsohn  added the comment:

The file was created and owned by another user.  I have removed the file.  I 
have reached out to the user to find out why he is creating it.

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[issue39453] Use-after-free in list contain

[Dong-hee Na]

Change by Dong-hee Na :


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pull_requests: +17583
pull_request: https://github.com/python/cpython/pull/18206

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[issue39466] Spam

[Zachary Ware]

Zachary Ware  added the comment:

I've removed the `User` role from that account since all of its posts have been 
spam; it will no longer be able to post.

--
nosy: +zach.ware
resolution: fixed -> not a bug
title: Great -> Spam

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 4a46adc7746930c4589ee483cad88d3f8504c045 by Victor Stinner in 
branch 'master':
bpo-39459: test.pythoninfo logs effective uid/gid (GH-18203)
https://github.com/python/cpython/commit/4a46adc7746930c4589ee483cad88d3f8504c045


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[issue39453] Use-after-free in list contain

[Dong-hee Na]

Change by Dong-hee Na :


--
pull_requests: +17582
pull_request: https://github.com/python/cpython/pull/18205

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[issue39453] Use-after-free in list contain

[miss-islington]

miss-islington  added the comment:


New changeset 9e1ed518a576897f914227bf538bac426a02a081 by Miss Islington (bot) 
(Dong-hee Na) in branch 'master':
bpo-39453: Add testcase for bpo-39453 (GH-18202)
https://github.com/python/cpython/commit/9e1ed518a576897f914227bf538bac426a02a081


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nosy: +miss-islington

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[issue39453] Use-after-free in list contain

[Dong-hee Na]

Change by Dong-hee Na :


--
pull_requests: +17581
pull_request: https://github.com/python/cpython/pull/18204

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Implicit conversion can also hide some bugs.

Semantically os.environ is an str to str mapping and os.environb is a bytes to 
bytes mapping.

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nosy: +serhiy.storchaka

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