[issue40526] documentation bad on asyncio

[Kyle Stanley]

Kyle Stanley  added the comment:

I presume this is referring to the following example on the first page of the 
docs:

```
import asyncio

async def main():
print('Hello ...')
await asyncio.sleep(1)
print('... World!')

# Python 3.7+
asyncio.run(main())
```

If so, the main purpose of that example is just to demonstrate basic 
async/await syntax, and show asyncio.run() for a trivial case to clearly show 
how it's used at a fundamental level; it's intentional that the more involved 
examples that demonstrate asynchronous programming are contained in 
https://docs.python.org/3/library/asyncio-task.html#coroutine. Also, the 
example is simple and condensed enough that it requires zero additional 
explanation or context, as should be the case for a simple "hello world" 
example. Consider the perspective of someone who found the page without having 
previously seen async/await syntax used.

FYI, in the future, I would highly recommend focusing more on the constructive 
parts when opening issues. Particularly the title "documentation bad on 
asyncio", provides zero context or usefulness. It also comes across as rather 
rude and unappreciative of the significant voluntary efforts that went into 
writing the documentation in the first place. Instead, something like "Improve 
example on front page of asyncio docs" is much more helpful.

--
nosy: +aeros

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[issue40517] Syntax highlighting for ASDL

[Raymond Hettinger]

Raymond Hettinger  added the comment:

I really like this idea but it needs different styling.  Attaching a screen 
shot will significant readability and beauty issues.

Suggest:
* Boldfacethe class names (Module, Interactive, etc)
* Unboldface the fields names (body, types_ignores, argtypes, etc)
* The tinted grape color does not work well on the green background.
* Perhaps have a graphic designer take a look.

--
Added file: https://bugs.python.org/file49129/Screen Shot 2020-05-05 at 
10.17.15 PM.png

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[issue40509] In argparse, allow REMAINDER(...) arguments in a mutually exclusive group

[Shani Armon]

Shani Armon  added the comment:

Why is REMAINDER any more complicated than ZERO_OR_MORE? I need to make a 
subcommand system (think jupyter style) and -- isn't an intuitive interface. 
Jupyter just doesn't use argparse in the subcommand case. I prever to in order 
to support options given before the subcommand, outside the mutually exclusive 
group (like -C for git)

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[issue40517] Syntax highlighting for ASDL

[Raymond Hettinger]

Raymond Hettinger  added the comment:


New changeset eff870b618ca6f6b7a60a271f15af7e54b8a1b97 by Raymond Hettinger in 
branch 'master':
Revert "bpo-40517: Implement syntax highlighting support for ASDL (#19928)" 
(#19950)
https://github.com/python/cpython/commit/eff870b618ca6f6b7a60a271f15af7e54b8a1b97


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[issue40517] Syntax highlighting for ASDL

[Raymond Hettinger]

Raymond Hettinger  added the comment:


New changeset d60040ba226bd2e3b6f58d074015aa2499dc1cb8 by Batuhan Taskaya in 
branch 'master':
bpo-40517: Implement syntax highlighting support for ASDL (#19928)
https://github.com/python/cpython/commit/d60040ba226bd2e3b6f58d074015aa2499dc1cb8


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[issue40517] Syntax highlighting for ASDL

[Raymond Hettinger]

Change by Raymond Hettinger :


--
pull_requests: +19265
pull_request: https://github.com/python/cpython/pull/19950

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[issue40512] Meta issue: per-interpreter GIL

[hai shi]

Change by hai shi :


--
nosy: +shihai1991

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[issue40357] asyncio: will shutdown_default_executor work in single step (stop, run_forever) mode?

[Kyle Stanley]

Kyle Stanley  added the comment:

> Is the new asyncio.loop.shutdown_default_executor() suitable for event loops 
> that are run in single-step mode?

I honestly can't say for certain; the primary intended use case for 
shutdown_default_executor() was to provide a means of properly finalizing the 
resources associated with the default executor without blocking the event loop, 
notably the threads in the ThreadPoolExecutor (which were intermittently left 
dangling).  So, when working on the implementation w/ Yury and Andrew, I did 
not strongly consider single-step event loops. I was more concerned with how it 
fit in with asyncio.run() and safe finalization of executor resources. See 
https://bugs.python.org/issue34037 for context.

If you have a recommendation for a change to the current version 
shutdown_default_executor() that would help provide compatibility with 
single-step event loops without hindering the primary goals, I'm sure it would 
be considered.

> Also, what happens to pending executor futures?

When using `loop.shutdown_default_executor()`, it calls 
executor.shutdown(wait=True), which waits for submitted futures to the executor 
to complete before joining the executor's workers (regardless of whether 
they're threads or processes). So, the executor should not be terminated prior 
to the pending futures being completed.

>From a glance at the example code posted above, it seems like it would be 
>incompatible with asyncio.run(), which is a requirement for 
>shutdown_default_executor(). See 
>https://github.com/python/cpython/blob/b9c46a2c2d7fc68457bff641f78932d66f5e5f59/Lib/asyncio/runners.py#L8.

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[issue40526] documentation bad on asyncio

[Chris Drake]

New submission from Chris Drake :

> The sample on this page is not demonstrating anything asynchronous:
> https://docs.python.org/3/library/asyncio.html

Put something that is relevant please.  e.g.

import asyncio
import time

async def say_after(delay, what):
await asyncio.sleep(delay)
print(what)

async def main():
print(f"started at {time.strftime('%X')}")
await say_after(2, 'world')
await say_after(1, 'hello')
print(f"finished at {time.strftime('%X')}")

asyncio.run(main())

--
components: asyncio
messages: 368223
nosy: asvetlov, cnd, yselivanov
priority: normal
severity: normal
status: open
title: documentation bad on asyncio
versions: Python 3.9

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[issue40480] "fnmatch" exponential execution time

[Tim Peters]

Change by Tim Peters :


--
assignee:  -> tim.peters
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue40480] "fnmatch" exponential execution time

[Tim Peters]

Tim Peters  added the comment:


New changeset b9c46a2c2d7fc68457bff641f78932d66f5e5f59 by Tim Peters in branch 
'master':
bpo-40480 "fnmatch" exponential execution time (GH-19908)
https://github.com/python/cpython/commit/b9c46a2c2d7fc68457bff641f78932d66f5e5f59


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[issue40516] GCC 9 compiler warnings on MacOS Catalina

[Ned Deily]

Change by Ned Deily :


--
components: +Build

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[issue40379] multiprocessing's default start method of fork()-without-exec() is broken

[Ned Deily]

Change by Ned Deily :


--
nosy: +davin, pitrou

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[issue40516] GCC 9 compiler warnings on MacOS Catalina

[Ned Deily]

Ned Deily  added the comment:

See proposed PR 19925 for further discussion.

--
components: +macOS -Build
nosy: +ned.deily, ronaldoussoren
versions: +Python 3.9

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[issue40501] Deprecate and remove ctypes usage in uuid

[Ned Deily]

Ned Deily  added the comment:

> (A) Ensure that _uuid works on macOS, FreeBSD and Linux, especially in the 
> macOS installer of python.org.

FWIW, a spot check shows that _uuid builds and test_uuid passes both sets of 
its tests, e.g. TestUUIDWithExtModule and TestUUIDWithoutExtModule, with 
current python.org macOS installers on macOS releases of interest.  So, AFAICT, 
we have no need for the ctypes fallback on at least macOS 10.6 or later and we 
don't actively support anything older than that.

--
nosy: +ned.deily

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[issue40417] PyImport_ReloadModule emits deprecation warning

[Robert Rouhani]

Robert Rouhani  added the comment:

No problem! Happy to contribute where I can :)

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[issue40417] PyImport_ReloadModule emits deprecation warning

[Brett Cannon]

Brett Cannon  added the comment:

Thanks for all your hard work, Robert!

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

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[issue40417] PyImport_ReloadModule emits deprecation warning

[miss-islington]

miss-islington  added the comment:


New changeset d64fd617e02346ecbcba9559f227936e08e89602 by Robert Rouhani in 
branch '3.7':
[3.7] bpo-40417: Fix deprecation warning in PyImport_ReloadModule (GH-19750) 
(GH-19935)
https://github.com/python/cpython/commit/d64fd617e02346ecbcba9559f227936e08e89602


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[issue40417] PyImport_ReloadModule emits deprecation warning

[miss-islington]

miss-islington  added the comment:


New changeset a32587a60da5939a3932bb30432d2bdd3d6203d4 by Robert Rouhani in 
branch '3.8':
[3.8] bpo-40417: Fix deprecation warning in PyImport_ReloadModule (GH-19750) 
(GH-19934)
https://github.com/python/cpython/commit/a32587a60da5939a3932bb30432d2bdd3d6203d4


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[issue18857] urlencode of a None value uses the string 'None'

[James Addison]

Change by James Addison :


--
pull_requests: +19264
pull_request: https://github.com/python/cpython/pull/19949

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[issue40420] argparse choices formatter

[paul j3]

paul j3  added the comment:

Related topic re. long usage with choices : https://bugs.python.org/issue16418

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[issue40518] ValueError when using resource.setrlimit on macOS Catalina

[Ned Deily]

Ned Deily  added the comment:

See the long discussion in Issue34602 for more details. The investigation there 
showed that there are now conditions when running in newer versions of macOS 
(apparently as of 10.14.4) where trying to increase the stack limit at run time 
using resource.RLIMIT_STACK fails.  If you do need to increase the stack limit, 
to handle deeper recusions etc, one solution is to rebuild Python for macOS 
with a larger stack size as shown in PR 14546 rather than trying to change it 
at runtime.

--
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> python3 resource.setrlimit strange behaviour under macOS

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[issue40509] In argparse, allow REMAINDER(...) arguments in a mutually exclusive group

[paul j3]

paul j3  added the comment:

Handling the positional with '?' and '*' in a mutually_exclusive_group is 
tricky enough!

I believe your user can use the '--' to get the same effect.

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[issue40509] In argparse, allow REMAINDER(...) arguments in a mutually exclusive group

[paul j3]

Change by paul j3 :


--
nosy: +paul.j3

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[issue40501] Deprecate and remove ctypes usage in uuid

[Steve Dower]

Change by Steve Dower :


--
keywords: +patch
pull_requests: +19263
stage: test needed -> patch review
pull_request: https://github.com/python/cpython/pull/19948

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[issue40525] zipapps execute symlinks as if they are code

[Anthony Sottile]

New submission from Anthony Sottile :

```console
$ ln -s 'import os; os.system("echo hi")' __main__.py
$ ls -al
total 8
drwxr-xr-x 2 asottile asottile 4096 May  5 15:55 .
drwxr-xr-x 3 asottile asottile 4096 May  5 14:50 ..
lrwxrwxrwx 1 asottile asottile   31 May  5 15:55 __main__.py -> 'import os; 
os.system("echo hi")'
$ zip --symlinks out.zip __main__.py 
  adding: __main__.py (stored 0%)
$ python3 out.zip
hi
```

I expect the output to be similar to running `__main__.py`:

```
$ python3 __main__.py 
python3: can't open file '__main__.py': [Errno 2] No such file or directory
```

(real usecase, I wanted `__main__.py` to be a symlink but got a very strange 
NameError and traced it down to executing the symlink target  name instead of 
the symlink destination)

--
components: Interpreter Core
messages: 368212
nosy: Anthony Sottile
priority: normal
severity: normal
status: open
title: zipapps execute symlinks as if they are code
type: behavior
versions: Python 3.7, Python 3.8, Python 3.9

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[issue40523] Weakref proxy missing pass throughs for hash() and reversed()

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


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

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[issue40523] Weakref proxy missing pass throughs for hash() and reversed()

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:


New changeset 96074de573f82fc66a2bd73c36905141a3f1d5c1 by Pablo Galindo in 
branch 'master':
bpo-40523: Add pass-throughs for hash() and reversed() to weakref.proxy objects 
(GH-19946)
https://github.com/python/cpython/commit/96074de573f82fc66a2bd73c36905141a3f1d5c1


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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

Change by STINNER Victor :


Added file: https://bugs.python.org/file49128/demo-pyperf.py

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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

STINNER Victor  added the comment:

I updated demo-pyperf.py to also benchmark multiprocessing.

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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

Change by STINNER Victor :


Removed file: https://bugs.python.org/file49126/demo.py

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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

Change by STINNER Victor :


Removed file: https://bugs.python.org/file49127/demo-pyperf.py

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[issue40517] Syntax highlighting for ASDL

[Raymond Hettinger]

Raymond Hettinger  added the comment:

+1

--
nosy: +rhettinger

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[issue40504] Restore weakref support for lru_cache wrappers

[Raymond Hettinger]

Raymond Hettinger  added the comment:


New changeset 1253c3ef70ea5632d32ae19579a14152db0d45c1 by Dennis Sweeney in 
branch 'master':
bpo-40504: Allow weakrefs to lru_cache objects (GH-19938)
https://github.com/python/cpython/commit/1253c3ef70ea5632d32ae19579a14152db0d45c1


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[issue40504] Restore weakref support for lru_cache wrappers

[Raymond Hettinger]

Raymond Hettinger  added the comment:

Thanks for the PE :-)

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

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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

STINNER Victor  added the comment:

Hum, demo.py is not reliable for threads: the standard deviation is quite 
large. I rewrote it using pyperf to compute the average and the standard 
deviation.

--
Added file: https://bugs.python.org/file49127/demo-pyperf.py

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[issue40511] IDLE yellow hint frame blinks when entering () in strings in functions/classes

[Terry J. Reedy]

Terry J. Reedy  added the comment:

1. What OS and for Windows/Mac, version?
2. What Python release and from where and how installed?
   If not latest release of x.y, where x.y >= 3.7, consider upgrading.
3. Tcl/tk version (see Help => About IDLE?
4. How start IDLE?
5. What is a the minimum action needed to exhibit the behavior.  Copy and paste 
minimum code.
6. Describe behavior with more detail.  What you wrote is nothing like anything 
that should happen (which is why you report it), so it is hard to imagine.

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[issue40474] Code coverage report not entirely accurate

[Lewis Ball]

Lewis Ball  added the comment:

I've updated the travis.yml now to fix this issue and global statements are now 
showing as covered in the coverage report.  This means an extra 4k lines show 
as covered which weren't previously showing. See the report for the PR here 
(https://codecov.io/gh/python/cpython/tree/64d521b5d34c25b83d0472608d1eab3a6334bf59/Lib).

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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

Change by STINNER Victor :


Removed file: https://bugs.python.org/file49124/demo.py

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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

STINNER Victor  added the comment:

(oops, there was a typo in my script: threads and subinterpreters was the same 
benchmark)

--
Added file: https://bugs.python.org/file49126/demo.py

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[issue40355] The ast module fails to reject certain malformed nodes

[miss-islington]

miss-islington  added the comment:


New changeset 2a3b876b0286b22a9058510d9e51dc4d60eeb89a by Miss Islington (bot) 
in branch '3.8':
bpo-40355: Improve error messages in ast.literal_eval with malformed Dict nodes 
(GH-19868)
https://github.com/python/cpython/commit/2a3b876b0286b22a9058510d9e51dc4d60eeb89a


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[issue37860] Add deploy preview for docs

[Batuhan Taskaya]

Batuhan Taskaya  added the comment:

> Personally, I feel that it most largely benefits more significant 
> documentation changes that involve modification of existing markup or the 
> addition of new markup, rather than all documentation PRs. So a manually 
> added label to trigger it makes the most sense to me. This would be very 
> similar to the recently added "test-with-buildbots" label.

+1, It would be so much useful in cases like GH 19928.

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[issue40355] The ast module fails to reject certain malformed nodes

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:


New changeset c21c51235aa8061da6b0593d6f857f42fd92fd8b by Curtis Bucher in 
branch 'master':
bpo-40355: Improve error messages in ast.literal_eval with malformed Dict nodes 
(GH-19868)
https://github.com/python/cpython/commit/c21c51235aa8061da6b0593d6f857f42fd92fd8b


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[issue40355] The ast module fails to reject certain malformed nodes

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 5.0 -> 6.0
pull_requests: +19262
pull_request: https://github.com/python/cpython/pull/19947

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[issue40523] Weakref proxy missing pass throughs for hash() and reversed()

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


--
keywords: +patch
nosy: +pablogsal
nosy_count: 1.0 -> 2.0
pull_requests: +19261
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/19946

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[issue18857] urlencode of a None value uses the string 'None'

[James Addison]

Change by James Addison :


--
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[issue29211] assertRaises with exceptions re-raised from a generator kills generator

[epiphyte]

Change by epiphyte :


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[issue40524] Print() issue

[Eric V. Smith]

Eric V. Smith  added the comment:

This is not the place to ask for help programming with python. What you're 
seeing is that your attribute_set or attribute_names mapping are missing 
whatever data you think should be present.

I suggest you ask for help on the python-list or python-tutor mailing lists:

https://mail.python.org/mailman/listinfo/python-list
https://mail.python.org/mailman/listinfo/tutor

--
components:  -Regular Expressions
nosy: +eric.smith
resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

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[issue40524] Print() issue

[Code436]

New submission from Code436 :

When I tried to print some stuff I get a KeyError:0

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[issue40524] Print() issue

[Code436]

Change by Code436 :


--
components: Regular Expressions
files: Python bug.png
nosy: Coder436, ezio.melotti, mrabarnett
priority: normal
severity: normal
status: open
title: Print() issue
type: behavior
versions: Python 3.8
Added file: https://bugs.python.org/file49125/Python bug.png

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[issue40523] Weakref proxy missing pass throughs for hash() and reversed()

[Raymond Hettinger]

New submission from Raymond Hettinger :

from weakref import proxy

class Alpha:
def __len__(self):
return 3
def __reversed__(self):
return iter('cba')
def __hash__(self):
return hash('abc')

a = Alpha()

# Direct use of the instance works
print(len(a))
print(list(reversed(a)))
print(hash(a))

# Proxies can use the dunder methods directly
r = proxy(a)
print(r.__len__())
print(list(r.__reversed__()))
print(r.__hash__())

# Proxy fails for __reversed__ and __hash__
print(len(r), 'This succeeds')
try:
print(list(reversed(r)))
except TypeError:
print('reverse(r) failed')
try:
print(hash(r))
except TypeError:
print('hash(r) failed')

--
components: Library (Lib)
messages: 368197
nosy: rhettinger
priority: normal
severity: normal
status: open
title: Weakref proxy missing pass throughs for hash() and reversed()
type: behavior
versions: Python 3.8, Python 3.9

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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

STINNER Victor  added the comment:

Attached demo.py: benchmark to compare performance of sequential execution, 
threads and subinterpreters.

--
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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[STINNER Victor]

STINNER Victor  added the comment:


New changeset fb2c7c4afbab0514352ab0246b0c0cc85d1bba53 by Victor Stinner in 
branch 'master':
bpo-40513: _xxsubinterpreters.run_string() releases the GIL (GH-19944)
https://github.com/python/cpython/commit/fb2c7c4afbab0514352ab0246b0c0cc85d1bba53


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[issue18857] urlencode of a None value uses the string 'None'

[James Addison]

James Addison  added the comment:

Chiming in here to add that I'd appreciate the ability to render 'standalone' 
(i.e. no '=') query-string keys in order to distinguish between 
absence-of-value and empty-string situations.

The backwards-compatibility concerns in here are genuine, so perhaps this could 
be introduced as an argument to urlencode with a disabled default value, 
allowing developers to opt-in.

>> Unless someone can point to a "real" web server that does something 
>> different with "" than with "=", there is no reason to make a change 
>> to Python.

There's a popular nodejs library that makes this serialization distinction 
explicit: https://github.com/sindresorhus/query-string#falsy-values

I've developed a Python 3.7-based set of commits[1] to address this issue.  I 
haven't yet opened this as a pull request since I see that Python 3.7 is in 
maintenance/bugfix mode[2].

In case a new urlencode flag would fall under the category of feature, I'll aim 
to develop a subsequent set of commits against the master development branch 
soon.

[1] - https://github.com/jayaddison/cpython/compare/3.7..9555467

[2] - https://devguide.python.org/#status-of-python-branches

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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 7be4e350aadf93c4be5c97b7291d0db2b6bc1dc4 by Victor Stinner in 
branch 'master':
bpo-40513: Per-interpreter GIL (GH-19943)
https://github.com/python/cpython/commit/7be4e350aadf93c4be5c97b7291d0db2b6bc1dc4


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[issue17254] add thai encoding aliases to encodings.aliases

[Benjamin Wood]

Benjamin Wood  added the comment:

This is an easy alias to a valid codepage. I supplied proof that they are the 
same.

I don't understand why this has been allowed to languish for 9 months.

Did I miss something? Is there more work I need to do?

Thanks

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[issue40246] Different error messages for same error - invalid string prefixes

[Lysandros Nikolaou]

Lysandros Nikolaou  added the comment:

Ok, I'm closing this, after consulting with Guido.

--
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status: open -> closed

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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 0dd5e7a718997da2026ed64fe054dc36cae4fee7 by Victor Stinner in 
branch 'master':
bpo-40513: new_interpreter() init GIL earlier (GH-19942)
https://github.com/python/cpython/commit/0dd5e7a718997da2026ed64fe054dc36cae4fee7


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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[STINNER Victor]

Change by STINNER Victor :


--
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[issue40458] test_bad_getattr crashes on APPX test

[miss-islington]

miss-islington  added the comment:


New changeset a6a116c1b964b3d1fdff0f533861ed2a2227de1f by Miss Islington (bot) 
in branch '3.8':
bpo-40458: Increase reserved stack space to prevent overflow crash on Windows 
(GH-19845)
https://github.com/python/cpython/commit/a6a116c1b964b3d1fdff0f533861ed2a2227de1f


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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[STINNER Victor]

Change by STINNER Victor :


--
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[issue40522] Subinterpreters: get the current Python interpreter state from Thread Local Storage (autoTSSkey)

[STINNER Victor]

STINNER Victor  added the comment:


New changeset e838a9324c1719bb917ca81ede8d766b5cb551f4 by Victor Stinner in 
branch 'master':
bpo-40522: _PyThreadState_Swap() sets autoTSSkey (GH-19939)
https://github.com/python/cpython/commit/e838a9324c1719bb917ca81ede8d766b5cb551f4


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[issue40521] Make tuple, dict, frame free lists, unicode interned strings, unicode latin1 singletons per-interpreter

[STINNER Victor]

STINNER Victor  added the comment:


New changeset b4b53868d7d6cd13505321d3802fd00865b25e05 by Victor Stinner in 
branch 'master':
bpo-40521: Disable free lists in subinterpreters (GH-19937)
https://github.com/python/cpython/commit/b4b53868d7d6cd13505321d3802fd00865b25e05


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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[STINNER Victor]

Change by STINNER Victor :


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[issue40458] test_bad_getattr crashes on APPX test

[Steve Dower]

Steve Dower  added the comment:

Merged without the improved diagnostics. I might add that later if I get time.

Łukasz - this is a fairly trivial crash fix that'd be nice (and safe) to pull 
into 3.8.3, but not critical. Your call.

--
assignee:  -> steve.dower
nosy: +lukasz.langa
stage: patch review -> commit review

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[issue40458] test_bad_getattr crashes on APPX test

[Steve Dower]

Steve Dower  added the comment:


New changeset ac4bf424119d1300f57929120968e216a85d3a25 by Steve Dower in branch 
'master':
bpo-40458: Increase reserved stack space to prevent overflow crash on Windows 
(GH-19845)
https://github.com/python/cpython/commit/ac4bf424119d1300f57929120968e216a85d3a25


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[issue40458] test_bad_getattr crashes on APPX test

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 5.0 -> 6.0
pull_requests: +19255
pull_request: https://github.com/python/cpython/pull/19941

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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

STINNER Victor  added the comment:

I created bpo-40522: "Subinterpreters: get the current Python interpreter state 
from Thread Local Storage (autoTSSkey)".

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[issue38323] asyncio: MultiLoopWatcher has a race condition (test_asyncio: test_close_kill_running() hangs on AMD64 RHEL7 Refleaks 3.x)

[Kyle Stanley]

Kyle Stanley  added the comment:

I have also explored a few different solutions and was unable to find a fix for 
this issue. If it's still causing intermittent hangs after Andrew's patch, we 
may want to consider skipping `test_close_kill_running` for `MultiLoopWatcher` 
until we can find one. This clearly seems to be a complex issue without an easy 
solution, and I don't think we want it to potentially mask other issues in the 
meantime.

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[issue40522] Subinterpreters: get the current Python interpreter state from Thread Local Storage (autoTSSkey)

[STINNER Victor]

Change by STINNER Victor :


--
keywords: +patch
pull_requests: +19254
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/19939

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[issue40522] Subinterpreters: get the current Python interpreter state from Thread Local Storage (autoTSSkey)

[STINNER Victor]

New submission from STINNER Victor :

_PyThreadState_GET() gets the current Python thread state from 
_PyRuntime.gilstate.tstate_current atomic variable.

When I experimented per-interpreter GIL (bpo-40512), I got issues with 
_PyThreadState_GET() which didn't return the expected Python thread state.

I propose to modify _PyThreadState_GET() in the exprimental isolated 
subinterpreters mode to get and set the current Python thread state using a 
Thread Local Storage: autoTSSkey.

--
components: Interpreter Core
messages: 368182
nosy: vstinner
priority: normal
severity: normal
status: open
title: Subinterpreters: get the current Python interpreter state from Thread 
Local Storage (autoTSSkey)
versions: Python 3.9

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[issue40512] Meta issue: per-interpreter GIL

[Kyle Stanley]

Change by Kyle Stanley :


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nosy: +aeros

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[issue36284] importlib.import_module() not thread safe if Exception is raised (3.4, 3.5)

[Patrick Thizy]

Patrick Thizy  added the comment:

I use Apache + mod_wsgi on Windows
When I update from Django 2.2.4 to Django 2.2.5, this fix has been apply
With this fix my application is not running
The navigator is lock and waiting 

Can you help me ?

--
nosy: +Patrick Thizy

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[issue40504] Restore weakref support for lru_cache wrappers

[Dennis Sweeney]

Change by Dennis Sweeney :


--
keywords: +patch
pull_requests: +19253
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/19938

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[issue38787] PEP 573: Module State Access from C Extension Methods

[STINNER Victor]

STINNER Victor  added the comment:

See also bpo-40137: TODO list when PEP 573 "Module State Access from C 
Extension Methods" will be implemented.

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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[STINNER Victor]

STINNER Victor  added the comment:

> From a user perspective, does it make sense to have a different 
> recursion_limit per interpreter?

Yes, I think so. Someone might use a lower limit to run a template rendering 
engine or "unsafe" code. Well, it's not hard to find random usage for 
interpreters with a configuration different than the main interpreter.

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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[STINNER Victor]

STINNER Victor  added the comment:

> FWIW, I think it would make sense to keep "signals_pending" under 
> _PyRuntimeState rather than moving it to PyInterpreterState.

Oh right. I forgot about the details. I reverted my change, but this time I 
added a comment to prevent me to write the same change in 6 months :-)

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[issue40521] Make tuple, dict, frame free lists, unicode interned strings, unicode latin1 singletons per-interpreter

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 607b1027fec7b4a1602aab7df57795fbcec1c51b by Victor Stinner in 
branch 'master':
bpo-40521: Disable Unicode caches in isolated subinterpreters (GH-19933)
https://github.com/python/cpython/commit/607b1027fec7b4a1602aab7df57795fbcec1c51b


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[issue40521] Make tuple, dict, frame free lists, unicode interned strings, unicode latin1 singletons per-interpreter

[STINNER Victor]

Change by STINNER Victor :


--
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pull_request: https://github.com/python/cpython/pull/19937

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[issue38787] PEP 573: Module State Access from C Extension Methods

[Petr Viktorin]

Change by Petr Viktorin :


--
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[issue40417] PyImport_ReloadModule emits deprecation warning

[Robert Rouhani]

Change by Robert Rouhani :


--
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[issue40417] PyImport_ReloadModule emits deprecation warning

[Robert Rouhani]

Change by Robert Rouhani :


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pull_request: https://github.com/python/cpython/pull/19934

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[issue40521] Make tuple, dict, frame free lists, unicode interned strings, unicode latin1 singletons per-interpreter

[STINNER Victor]

Change by STINNER Victor :


--
keywords: +patch
pull_requests: +19248
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/19933

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[issue40515] test_ssl.py hangs with SSL 1.1 built with no threads

[Christian Heimes]

Christian Heimes  added the comment:

It not about what I wish or wish not to do.

Python requires thread-safe libraries. A library without proper locking and 
thread safety is no longer safe to use without great effort and careful locking 
in the glue code. A non-threaded OpenSSL build will lead to memory corruption 
and eventually crash the interpreter.

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[issue40521] Make tuple, dict, frame free lists, unicode interned strings, unicode latin1 singletons per-interpreter

[STINNER Victor]

New submission from STINNER Victor :

tuple, dict and frame use free lists to optimize the creation of objects.

Unicode uses "interned" strings to reduce the Python memory footprint and 
speedup dictionary lookups.

Unicode also uses singletons for single letter Latin1 characters ([U+; 
U+00FF] range).

All these optimizations are incompatible with isolated subinterpreters, since 
caches are currently shared by all inteprepreters. These caches should be made 
per-intepreter. See bpo-40512 "Meta issue: per-interpreter GIL" for the 
rationale.

I already made small integer singletons per interpreter in bpo-38858:

* commit 5dcc06f6e0d7b5d6589085692b86c63e35e2325e
* commit 630c8df5cf126594f8c1c4579c1888ca80a29d59.

--
components: Interpreter Core
messages: 368175
nosy: vstinner
priority: normal
severity: normal
status: open
title: Make tuple, dict, frame free lists, unicode interned strings, unicode 
latin1 singletons per-interpreter
versions: Python 3.9

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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 299b8c61e9d1a42b929b8deb1b05067876e191e6 by Victor Stinner in 
branch 'master':
Revert "bpo-40513: Per-interpreter signals pending (GH-19924)" (GH-19932)
https://github.com/python/cpython/commit/299b8c61e9d1a42b929b8deb1b05067876e191e6


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[issue40379] multiprocessing's default start method of fork()-without-exec() is broken

[Itamar Turner-Trauring]

Itamar Turner-Trauring  added the comment:

Just got an email from someone for whom switching to "spawn" fixed a problem. 
Earlier this week someone tweeted about this fixing things. This keeps hitting 
people in the real world.

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[issue40514] Add --experimental-isolated-subinterpreters build option

[Eric Snow]

Eric Snow  added the comment:

It would probably make sense to remove the build option in the 3.9 release.  We 
can leave it in master, but remove it in the 3.9 branch once it has been 
created.

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[issue40520] Remove redundant comment in pydebug.h

[hai shi]

hai shi  added the comment:

Thanks, Dong-hee Na ;)

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[issue40010] Inefficient signal handling in multithreaded applications

[Eric Snow]

Eric Snow  added the comment:

Good catch on this, Victor.  Thanks for doing it.

--
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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[Eric Snow]

Eric Snow  added the comment:

If this issue covers the GIL (which it seems to) then I'd expect 
_PyRuntimeState.gilstate to be handled here too.

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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[Eric Snow]

Eric Snow  added the comment:

>From a user perspective, does it make sense to have a different 
>recursion_limit per interpreter?  I don't see a problem with it.  However, 
>does it make sense to also keep a global value that we default to when a 
>per-interpreter value is not set?  I think it might.

I suppose a bigger question is what users will expect the recursion limit (AKA 
"sys.getrecursionlimit()") to be for a newly created subinterpreter.  Will it 
be some global default?  Will it be the value from the parent interpreter?  I'd 
go with a global default, which would imply that the default value should be 
stored under _PyRuntimeState like we had it (but still keep the actual 
per-interpreter field for the actual value).

FWIW, the existing docs don't really block either approach.

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[issue40512] Meta issue: per-interpreter GIL

[Dong-hee Na]

Change by Dong-hee Na :


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nosy: +corona10

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[issue40520] Remove redundant comment in pydebug.h

[Dong-hee Na]

Dong-hee Na  added the comment:

Thanks hai shi :)

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nosy: +corona10
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue40520] Remove redundant comment in pydebug.h

[Dong-hee Na]

Change by Dong-hee Na :


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title: port the declartions in pydebug.h to initconfig.h -> Remove redundant 
comment in pydebug.h

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[issue40520] port the declartions in pydebug.h to initconfig.h

[miss-islington]

miss-islington  added the comment:


New changeset 6351d9e4400a77fe1fcbe4f03e5fb6620cca236d by Hai Shi in branch 
'master':
bpo-40520: Remove redundant comment in pydebug.h (GH-19931)
https://github.com/python/cpython/commit/6351d9e4400a77fe1fcbe4f03e5fb6620cca236d


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[issue40512] Meta issue: per-interpreter GIL

[STINNER Victor]

Change by STINNER Victor :


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nosy: +eric.snow

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[issue40514] Add --experimental-isolated-subinterpreters build option

[STINNER Victor]

Change by STINNER Victor :


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nosy: +eric.snow

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[issue40513] Move _PyRuntimeState.ceval to PyInterpreterState

[Eric Snow]

Eric Snow  added the comment:

FWIW, I think it would make sense to keep "signals_pending" under 
_PyRuntimeState rather than moving it to PyInterpreterState.

Signals are only handled by the main interpreter (in its main thread).  Even 
though "signals_pending" is useful to only one interpreter in the runtime, 
making it per-interpreter sends the wrong message that it is significant at 
that level.  This may be confusing to readers of the code.

At the very least there should be a clear comment with the field in 
Include/internal/pycore_interp.h explaining how it is only used by the main 
interpreter and why we made it per-interpreter anyway.

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nosy: +eric.snow

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[issue29587] Generator/coroutine 'throw' discards exc_info state, which is bad

[STINNER Victor]

STINNER Victor  added the comment:


New changeset b0be6b3b94fbdf31b796adc19dc86a04a52b03e1 by Victor Stinner in 
branch 'master':
bpo-29587: _PyErr_ChainExceptions() checks exception (GH-19902)
https://github.com/python/cpython/commit/b0be6b3b94fbdf31b796adc19dc86a04a52b03e1


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