[issue41794] Memory leak in asyncio server

[Bale]

Bale  added the comment:

Also, if this is intended behavior and there is something that I am missing, 
you should really make it more clear in the documentation. In every project I 
found on github that uses asyncio.start_server, the bug exists

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[issue41517] Able to subclass enum with members by using multiple inheritance

[Ethan Furman]

Change by Ethan Furman :


--
versions: +Python 3.10, Python 3.8, Python 3.9 -Python 3.7

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[issue41789] Enum: __str__ and friends sometimes erroneously replaced

[Ethan Furman]

Change by Ethan Furman :


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[issue41517] Able to subclass enum with members by using multiple inheritance

[Ethan Furman]

Change by Ethan Furman :


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[issue31870] add timeout parameter for get_server_certificate in ssl.py

[Zackery Spytz]

Change by Zackery Spytz :


--
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nosy: +ZackerySpytz
nosy_count: 5.0 -> 6.0
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[issue41794] Memory leak in asyncio server

[Bale]

New submission from Bale :

In the file I attached below is a pretty simple asyncio server, it is identical 
to the echo server on the documentation except it does not disconnect after 
echoing. 

When a connection is received, it creates an object called "test object" and 
the only reference to that object is on the local scope. If all is working 
properly, when the handler function returns the test object should also be 
deleted, but I noticed the __del__ method is not being called, indicating 
python is not deleting it. It seems like a reference to the frame of the 
handler is being kept in a list (not sure where) and it is not being removed 
from it.

Here is example code of how to trigger the bug:
s = socket.socket();s.connect(("127.0.0.1", ));s.send(b"test\0")
s.close()

By sending data and closing afterwards WITHOUT using s.recv() causes the issue, 
what's interesting is that if we call s.close() immediately after sending, the 
object is deleted by the server and everything works as intended. Calling 
s.close() a few seconds after, causes the bug to happen. It should also be 
noted that if I call s.recv() before s.close(), the bug does not happen.

What's more interesting is that when I run the above code in my python3.5 
interpreter the bug does not get triggered, no matter what I do. The bug does 
also not happen when I run it in a python3.8 interpreter on my windows 
computer. When I run on the code on ubuntu on a python3.8 interpreter, the bug 
is triggered.

--
Added file: https://bugs.python.org/file49460/test_server.py

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[issue41794] Memory leak in asyncio server

[Bale]

Change by Bale :


--
components: asyncio
nosy: EmperorBale, asvetlov, valid22, yselivanov
priority: normal
severity: normal
status: open
title: Memory leak in asyncio server
type: behavior
versions: Python 3.8

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[issue41792] No (public) way to dynamically introspect if an annotation is a TypedDict

[Guido van Rossum]

Change by Guido van Rossum :


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[issue41792] No (public) way to dynamically introspect if an annotation is a TypedDict

[Guido van Rossum]

Guido van Rossum  added the comment:


New changeset 0705ec8a149e27023b0420ae0366d16255f6c9f7 by Patrick Reader in 
branch 'master':
bpo-41792: Add is_typeddict function to typing.py (GH-22254)
https://github.com/python/cpython/commit/0705ec8a149e27023b0420ae0366d16255f6c9f7


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[issue40288] [subinterpreters] atexit module should not be loaded more than once per interpreter

[hai shi]

Change by hai shi :


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[issue41787] adding PEP references to documentation

[Cameron Simpson]

Change by Cameron Simpson :


--
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pull_request: https://github.com/python/cpython/pull/22269

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[issue41784] Promote PyUnicode_AsUTF8AndSize to be available with the limited API (PEP 384)

[Inada Naoki]

Inada Naoki  added the comment:

PyUnicode_AsUTF8 is useful "API". But it can be implemented as C macro, C 
inline function, or functions/macros in any other languages using 
PyUnicode_AsUTF8AndSize.

PyUnicode_AsUTF8AndSize is more important for "ABI".

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[issue28694] tkinter interface to fontchooser

[Mark Roseman]

Mark Roseman  added the comment:

Elaine, I was just having a look at this the other day too! I agree, this is 
definitely worth some effort to get done.

To be honest, I'm not a fan of the vwait solution to force the dialog to be 
modal. It doesn't actually make it modal (i.e. you can still do stuff in other 
windows). Moreover, the Mac version (which is native, so couldn't easily be 
made modal via Tkinter) has a very different design than on other platforms. It 
doesn't have "ok", "apply", "cancel" buttons or similar. It's designed to just 
hang around. 

When the font dialog was originally proposed for Tk (see http://tip.tcl.tk/324) 
they'd tried a modal API first and found it unworkable.

In light of that, my preference for the official wrapper would be to mirror the 
underlying API, as per what Lance's version first tried, using a callback 
mechanism to return results. Most importantly, it would eliminate the 
assumption that there's always a way to make it modal. Documentation would be 
key. Mind you, there's no official docs for the other dialogs. I can guarantee 
it would be well-documented with an example on TkDocs anyway!

If there aren't any strong objections, I'm able to have a go at modifying 
Lance's version over the next week or so. I've got Mac, Windows, and Linux 
environments to test everything out. 

Question... I assume the official wrapper needs checks to ensure fontchooser is 
available (i.e. 8.6 or greater). If not, should the wrapper just error out? 
Would providing an alternative implementation for Tk < 8.6 be something that 
would be done in an external module, or might that be something that 
could/should be included in the official library?

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[issue41762] Documentation job fails on CIs: duplicate token description of format_spec

[Cameron Simpson]

Change by Cameron Simpson :


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[issue41758] turtledemo.colormixer crashes with a stack overflow

[Terry J. Reedy]

Terry J. Reedy  added the comment:

Another oddity of this crash is that Python usually checks stack usage and 
raise RecursionError when the limit is reached.  Event handling apparently can 
bypass this.

I opened python-list thread "Need tests of turtledemo.colordemo on Windows 
installations".  Colormixer works fine for Frank Milman and MRAB. Dennis Lee 
Bieber asked whether there was a mix of 32- and 64-bit stuff.

Until someone else has the same problem, I am tempted to close this as 
local-system-specific.  ('Works for me')  I certainly have no more to say on 
this.

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[issue41789] Enum: __str__ and friends sometimes erroneously replaced

[miss-islington]

miss-islington  added the comment:


New changeset 929112ef81ccef20d3aef25c8a1142059ee941da by Miss Islington (bot) 
in branch '3.8':
bpo-41789: honor object overrides in Enum classes (GH-22250)
https://github.com/python/cpython/commit/929112ef81ccef20d3aef25c8a1142059ee941da


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[issue36223] Execution sequence for print function

[Ketan Sharma]

Change by Ketan Sharma :


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[issue41749] Allow omission of imghdr.what file arg if bytes are given

[Emmanuel Arias]

Emmanuel Arias  added the comment:

> The opening message confused me by using 'need' as 'currently required to 
> call' rather than 'required to compute (test) and necessarily needed to 
> call'; but after reading the code, I believe I understand and modified title 
> to match.

Sorry for my bad English, yes my idea was more likely your point of view. In 
the future I'll try to be more clear. 

> However, what is very problemmatic is requiring 1 of 2 different arguments.  
> For range, the first parameter is really 'start_or_stop', an int either way, 
> with the interpretation depending on the presence of a second.  This is a 
> nuisance for understanding, but a convenience in usage.  But I think 
> requiring an argument (usually) passed positionally or an argument that now 
> has to be passed by keyword, with an arbitrary letter name, is worse and less 
> justified.  So my current view is that this change should be rejected.

My intention is try to avoid a call like `what(None, b'...')`. IMO call a 
function that start with None seems a little weird (from my point of view). 
Sincerely, I don't know if for the people it's ok use `what(None, b'...')` or 
not, probably not because haven't changed since 1997.

Reading your opinion it's more clear for me that this patch should be rejected. 
So, I'll close this issue and the PR.

Thanks for the feedback, very appreciate.

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status: open -> closed

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[issue41787] adding PEP references to documentation

[Cameron Simpson]

Cameron Simpson  added the comment:

Argh. I bet that additional %s above won't work :-(

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[issue39587] Mixin repr overrides Enum repr in some cases

[Ethan Furman]

Change by Ethan Furman :


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status: open -> closed

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[issue41787] adding PEP references to documentation

[Cameron Simpson]

Cameron Simpson  added the comment:

Re the possible change to "New in version V." text, my proposal there is the 
make this become:

New in :ref:`version V `.

by modifying the definitions in sphinxdomains/changset.py from:

versionlabels = {
'versionadded':   _('New in version %s'),
'versionchanged': _('Changed in version %s'),
'deprecated': _('Deprecated since version %s'),
}

to:

versionlabels = {
'versionadded':   _('New in :ref:`version %s `'),
'versionchanged': _('Changed in :ref:`version %s `'),
}

and adding a:

:: _whatsnew-3.7:

to Doc/whatsnew/3.7.rst and likewise for the other whatsnew files.

That requires a change to both the docs and sphinx, and is independent of the 
PEP reference additions. I'll make a distinct PR for this, unrelated to the 
other PRs.

In an ideal world we could be more precise by using one of the 
_whatsnew37-feature anchors where they are present, but I don't see how to 
integrate that into the versionadded directives (absent something quite 
intrusive). The above change makes a docs-wide sweep immediately without 
additional work.

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[issue39587] Mixin repr overrides Enum repr in some cases

[Ethan Furman]

Ethan Furman  added the comment:


New changeset 95b81e2f8c955823dbf5632a817902b8a4916eaa by Miss Islington (bot) 
in branch '3.9':
bpo-39587: Enum - use correct mixed-in data type (GH-22263) (GH-22266)
https://github.com/python/cpython/commit/95b81e2f8c955823dbf5632a817902b8a4916eaa


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[issue41789] Enum: __str__ and friends sometimes erroneously replaced

[miss-islington]

Change by miss-islington :


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[issue41780] Generic Alias attributes nor in dir()

[Guido van Rossum]

Change by Guido van Rossum :


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[issue41780] Generic Alias attributes nor in dir()

[miss-islington]

miss-islington  added the comment:


New changeset 49917d576a578c8c29b8dbcbd5257c366a53d498 by Miss Islington (bot) 
in branch '3.9':
bpo-41780: Fix __dir__ of types.GenericAlias (GH-22262)
https://github.com/python/cpython/commit/49917d576a578c8c29b8dbcbd5257c366a53d498


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[issue41789] Enum: __str__ and friends sometimes erroneously replaced

[miss-islington]

miss-islington  added the comment:


New changeset 22415ad62555d79bd583b4a7d6a96006624a8277 by Ethan Furman in 
branch 'master':
bpo-41789: honor object overrides in Enum classes (GH-22250)
https://github.com/python/cpython/commit/22415ad62555d79bd583b4a7d6a96006624a8277


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[issue39587] Mixin repr overrides Enum repr in some cases

[miss-islington]

miss-islington  added the comment:


New changeset 8f8ebcca95d3b6ed0a522a9736ab53d6d4f0208c by Miss Islington (bot) 
in branch '3.8':
bpo-39587: Enum - use correct mixed-in data type (GH-22263)
https://github.com/python/cpython/commit/8f8ebcca95d3b6ed0a522a9736ab53d6d4f0208c


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[issue39587] Mixin repr overrides Enum repr in some cases

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 5.0 -> 6.0
pull_requests: +21321
pull_request: https://github.com/python/cpython/pull/22265

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[issue39587] Mixin repr overrides Enum repr in some cases

[miss-islington]

Change by miss-islington :


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pull_request: https://github.com/python/cpython/pull/22266

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[issue39587] Mixin repr overrides Enum repr in some cases

[Ethan Furman]

Ethan Furman  added the comment:


New changeset bff01f3a3aac0c15fe8fbe8b2f561f7927d117a1 by Ethan Furman in 
branch 'master':
bpo-39587: Enum - use correct mixed-in data type (GH-22263)
https://github.com/python/cpython/commit/bff01f3a3aac0c15fe8fbe8b2f561f7927d117a1


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[issue41739] test_logging: threading_cleanup() failed to cleanup 1 threads (count: 1, dangling: 2)

[STINNER Victor]

STINNER Victor  added the comment:

s390x Debian 3.x:
https://buildbot.python.org/all/#/builders/49/builds/75

Warning -- threading_cleanup() failed to cleanup 1 threads (count: 1, dangling: 
2)
Warning -- Dangling thread: <_MainThread(MainThread, started 4396138073968)>
Warning -- Dangling thread: 

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[issue34394] Descriptors HowTo doesn't mention __set_name__

[Raymond Hettinger]

Raymond Hettinger  added the comment:

I have a draft PR but haven't checked it in yet.  Will do so shortly :-)

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[issue39587] Mixin repr overrides Enum repr in some cases

[Ethan Furman]

Ethan Furman  added the comment:

Yes, the change only considered types with their own copy of `__new__` to be 
actual data types, so in 3.6 `HexInt` was the recognized data type, but in 3.7+ 
it was `int` -- which also meant that HexEnum was considered a simple mix-in 
and its `__repr__` was used instead of `Enum.__repr__`.

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[issue13340] list.index does not accept None as start or stop

[Irit Katriel]

Irit Katriel  added the comment:

The error message was fixed under issue29935, so I think this issue can now be 
closed.

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[issue41780] Generic Alias attributes nor in dir()

[miss-islington]

Change by miss-islington :


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[issue41780] Generic Alias attributes nor in dir()

[miss-islington]

miss-islington  added the comment:


New changeset 2e87774df1a0eaf2a1fe8cc4d958df60f7125b6e by Batuhan Taskaya in 
branch 'master':
bpo-41780: Fix __dir__ of types.GenericAlias (GH-22262)
https://github.com/python/cpython/commit/2e87774df1a0eaf2a1fe8cc4d958df60f7125b6e


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[issue39587] Mixin repr overrides Enum repr in some cases

[Ethan Furman]

Change by Ethan Furman :


--
versions: +Python 3.10, Python 3.9 -Python 3.7

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[issue41631] _ast module: get_global_ast_state() doesn't work with Mercurial lazy import

[STINNER Victor]

STINNER Victor  added the comment:

I also tested bpo-41261 reproducer and 
https://bugs.python.org/issue41194#msg372863 reproducer on 3.9 and master 
branches: Python doesn't crash.

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[issue39587] Mixin repr overrides Enum repr in some cases

[Ethan Furman]

Change by Ethan Furman :


--
keywords: +patch
pull_requests: +21319
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/22263

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[issue41631] _ast module: get_global_ast_state() doesn't work with Mercurial lazy import

[STINNER Victor]

STINNER Victor  added the comment:

I close the issue. I tested manually: the fix works as expected.

I reproduced https://bugzilla.redhat.com/show_bug.cgi?id=1871992#c1 bug (I had 
to comment the workaround of the mercurial package in Fedora) on 3.9:

make[1]: Entering directory '/home/vstinner/mercurial/mercurial-5.4/doc'
/home/vstinner/python/3.9/python gendoc.py "hgrc.5" > hgrc.5.txt.tmp
python: Python/Python-ast.c:231: get_ast_state: Assertion `state != NULL' 
failed.

I confirm that the fix in 3.9 works as expected:

> New changeset 55e0836849c14fb474e1ba7f37851e07660eea3c by Pablo Galindo in 
> branch '3.9'

=> No crash with this fix.


I also reproduced the bug in the master branch (without the fix), and I also 
confirm that the fix in master does fix the crash.

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

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[issue23832] pdb's `longlist` shows only decorator if that one contains a lambda

[Irit Katriel]

Change by Irit Katriel :


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[issue37296] pdb next vs __next__

[Irit Katriel]

Irit Katriel  added the comment:

I think this ticket can be closed.

Rick can always reopen it or create a new one if there is still an open problem.

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[issue41780] Generic Alias attributes nor in dir()

[Batuhan Taskaya]

Change by Batuhan Taskaya :


--
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pull_requests: +21318
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pull_request: https://github.com/python/cpython/pull/22262

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[issue33802] Regression in logging configuration

[Andrés Delfino]

Change by Andrés Delfino :


--
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nosy_count: 8.0 -> 9.0
pull_requests: +21317
pull_request: https://github.com/python/cpython/pull/22205

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[issue36533] logging regression with threading + fork are mixed in 3.7.1rc2 (deadlock potential)

[Andrés Delfino]

Change by Andrés Delfino :


--
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[issue6721] Locks in the standard library should be sanitized on fork

[Andrés Delfino]

Change by Andrés Delfino :


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[issue28694] tkinter interface to fontchooser

[E. Paine]

E. Paine  added the comment:

+1 I also think that the fontchooser should be wrapped. I briefly tested your 
wrapper, Lance, and found it worked fine on Windows but did not on my Linux 
setup (because it is non-modal).

I went about implementing my own wrapper based loosely around your's (see 
attached) and the way I overcame this problem was to use vwait (this still 
works on Windows where the call is modal). vwait is good because it returns 
once the condition is fulfilled without the need for polling or similar.

While I use the commondialog module in the wrapper, this is simply for its 
handling (in __init__) of the master (I don't think it would make sense to 
enhance the Dialog class for this wrapper).

> the awful kludge in the show method (creating a Frame widget just so that 
> some low-level operations can be performed) is repugnant to me

You're going to moan at me then for using something similar in the attached! 
The reason I use it is to avoid the logic found on line 77 of your wrapper and 
*hopefully* make the code more readable (whether I achieve this is somewhat 
debatable).

> I have access only to Windows OS

Is this still the case or can you now test on a different system which is 
non-modal?


Do you wish to go ahead with authoring a patch for this or would you prefer me 
to do it? (I would appreciate you reviewing it either way and you would still 
get credit in the news as I took sections from your wrapper) If everything goes 
well, we can hopefully get this into Python 3.10 (as this is a new feature, it 
won't be back-ported to 3.9 and before).

--
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versions: +Python 3.10 -Python 3.7
Added file: https://bugs.python.org/file49459/fontchooser.py

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[issue41784] Promote PyUnicode_AsUTF8AndSize to be available with the limited API (PEP 384)

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

PyUnicode_AsUTF8() is used 3 times more than PyUnicode_AsUTF8AndSize().

$ find -type f -name '*.c' -exec egrep 'PyUnicode_AsUTF8AndSize\(' '{}' + | wc 
-l
35
$ find -type f -name '*.c' -exec egrep 'PyUnicode_AsUTF8\(' '{}' + | wc -l
101

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[issue41052] Opt out serialization/deserialization for heap type

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

There are other heap types implemented in C in the stdlib and third-party 
libraries for which pickling with protocols 0 and 1 works incorrectly. It would 
be better to fix copyreg._reduce_ex() instead of disabling pickling for these 
types one by one.

>From PEP 307:


> Let D be the class on the object to be pickled. First, find the nearest base 
> class that is implemented in C (either as a built-in type or as a type 
> defined by an extension class). Call this base class B, and the class of the 
> object to be pickled D. Unless B is the class 'object', instances of class B 
> must be picklable, either by having built-in support (as defined in the above 
> three bullet points), or by having a non-default __reduce__ implementation. B 
> must not be the same class as D (if it were, it would mean that D is not 
> implemented in Python).

The problem is with determining which class is implemented in C. The current 
code implies that heap types are implemented in Python, and static types are 
implemented in C. It is not always true, because some heap types can be 
implemented in C.

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[issue38113] Remove statics from ast.c

[Łukasz Langa]

Łukasz Langa  added the comment:


New changeset 55e0836849c14fb474e1ba7f37851e07660eea3c by Pablo Galindo in 
branch '3.9':
[3.9] bpo-41631: _ast module uses again a global state (GH-21961) (GH-22258)
https://github.com/python/cpython/commit/55e0836849c14fb474e1ba7f37851e07660eea3c


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[issue41631] _ast module: get_global_ast_state() doesn't work with Mercurial lazy import

[Łukasz Langa]

Łukasz Langa  added the comment:


New changeset 55e0836849c14fb474e1ba7f37851e07660eea3c by Pablo Galindo in 
branch '3.9':
[3.9] bpo-41631: _ast module uses again a global state (GH-21961) (GH-22258)
https://github.com/python/cpython/commit/55e0836849c14fb474e1ba7f37851e07660eea3c


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[issue38113] Remove statics from ast.c

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


--
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[issue41631] _ast module: get_global_ast_state() doesn't work with Mercurial lazy import

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


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[issue41780] Generic Alias attributes nor in dir()

[Guido van Rossum]

Change by Guido van Rossum :


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[issue41780] Generic Alias attributes nor in dir()

[Guido van Rossum]

Guido van Rossum  added the comment:

The forwarding of `__class__`, and the resulting difference between 
`type(list[int])` and `list[int].__class__` are intentional.

I think overriding `__dir__` along the lines suggested by Allan (but in C of 
course) would be the best solution.

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[issue41790] C-API documentation ignores heap types and says type objects must never be deallocated

[Ammar Askar]

Change by Ammar Askar :


--
title: C-API documentation -> C-API documentation ignores heap types and says 
type objects must never be deallocated

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[issue41784] Promote PyUnicode_AsUTF8AndSize to be available with the limited API (PEP 384)

[Alex Gaynor]

Alex Gaynor  added the comment:

I think less is more, one API is plenty :-)

It looks to me like the API is already supported on PyPy, so I think it's fine 
from that perspective: 
https://foss.heptapod.net/pypy/pypy/-/blob/branch/py3.7/pypy/module/cpyext/unicodeobject.py#L493

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[issue41631] _ast module: get_global_ast_state() doesn't work with Mercurial lazy import

[Łukasz Langa]

Łukasz Langa  added the comment:


New changeset e5fbe0cbd4be99ced5f000ad382208ad2a561c90 by Victor Stinner in 
branch 'master':
bpo-41631: _ast module uses again a global state (#21961)
https://github.com/python/cpython/commit/e5fbe0cbd4be99ced5f000ad382208ad2a561c90


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[issue38113] Remove statics from ast.c

[Łukasz Langa]

Łukasz Langa  added the comment:


New changeset e5fbe0cbd4be99ced5f000ad382208ad2a561c90 by Victor Stinner in 
branch 'master':
bpo-41631: _ast module uses again a global state (#21961)
https://github.com/python/cpython/commit/e5fbe0cbd4be99ced5f000ad382208ad2a561c90


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[issue41793] Inaccuracy about reflected operands in datamodel docs.

[wim glenn]

Change by wim glenn :


--
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pull_request: https://github.com/python/cpython/pull/22257

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[issue41793] Inaccuracy about reflected operands in datamodel docs.

[wim glenn]

New submission from wim glenn :

Qualifying that the right operand's type must be a *strict* subclass for the 
reflected method to take precedence avoids an edge case / counter-example when 
the types are actually equal.

>>> class A:
... def __add__(self, other):
... print(1)
... def __radd__(self, other):
... print(2)
...
>>> A() + A()
1
>>> issubclass(A, A)
True

--
assignee: docs@python
components: Documentation
messages: 376944
nosy: docs@python, wim.glenn
priority: normal
severity: normal
status: open
title: Inaccuracy about reflected operands in datamodel docs.

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[issue34394] Descriptors HowTo doesn't mention __set_name__

[wim glenn]

wim glenn  added the comment:

Hi Raymond, any update on this?

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[issue21644] Optimize bytearray(int) constructor to use calloc()

[Bruce Merry]

Bruce Merry  added the comment:

Was this abandoned just because nobody had the time, or was there a problem 
with the approach? I independently wanted this optimisation, and have ended up 
implementing something very similar to what was reverted in 
https://hg.python.org/lookup/dff6b4b61cac.

In a benchmark that creates a large bytearray, then fills it with 
socket.readinto, I'm seeing a 2x performance improvement on Linux, and from 
some quick benchmarking it seems to be just as fast as the old code for small 
arrays that are allocated from the pool.

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[issue41784] Promote PyUnicode_AsUTF8AndSize to be available with the limited API (PEP 384)

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

What about PyUnicode_AsUTF8? Should it be made public too or left for internal 
use only?

What about third-party implementations of Python? How hard to implement this 
API on an implementation without reference counts? It is interesting to hear 
the expert opinion of the core developers of PyPy.

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[issue41780] Generic Alias attributes nor in dir()

[Batuhan Taskaya]

Batuhan Taskaya  added the comment:

Okay, so IIRC if we stop forwarding __class__ (add it as an exception to 
attr_exceptions) it would return us the original dir(), and also solve the 
inconsistency of the example you gave;

> >>> list.__class__
> 
> >>> list[int].__class__
> 
>
> >>> type(list)
> 
> >>> type(list[int])
> 

but the problem is that, it is not 'exactly' complying with the specs at PEP 
585. I am aware that we already added some extras to this list 
(https://www.python.org/dev/peps/pep-0585/#parameters-to-generics-are-available-at-runtime)
 like __mro_entries__ etc, but __class__ looks like a tricky problem. 
@gvanrossum any comments?

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[issue41776] Revise example of "continue" in the tutorial documentation

[Eric V. Smith]

Change by Eric V. Smith :


--
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status: open -> closed

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[issue41776] Revise example of "continue" in the tutorial documentation

[Eric V. Smith]

Eric V. Smith  added the comment:


New changeset a0da90720d5330c53b8083272374ede1c7a1e33a by Miss Islington (bot) 
in branch '3.8':
bpo-41776: Revise example of "continue" in the tutorial documentation 
(GH-22234) (GH-22256)
https://github.com/python/cpython/commit/a0da90720d5330c53b8083272374ede1c7a1e33a


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[issue41776] Revise example of "continue" in the tutorial documentation

[Eric V. Smith]

Eric V. Smith  added the comment:


New changeset 0cc037f8a72c283bf64d1968e34cbdc22b0e3010 by Miss Islington (bot) 
in branch '3.9':
bpo-41776: Revise example of "continue" in the tutorial documentation 
(GH-22234) (GH-22255)
https://github.com/python/cpython/commit/0cc037f8a72c283bf64d1968e34cbdc22b0e3010


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[issue41776] Revise example of "continue" in the tutorial documentation

[miss-islington]

Change by miss-islington :


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[issue41776] Revise example of "continue" in the tutorial documentation

[Eric V. Smith]

Eric V. Smith  added the comment:


New changeset 7bcc6456ad4704da9b287c8045768fa53961adc5 by Neeraj Samtani in 
branch 'master':
bpo-41776: Revise example of "continue" in the tutorial documentation (GH-22234)
https://github.com/python/cpython/commit/7bcc6456ad4704da9b287c8045768fa53961adc5


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[issue41776] Revise example of "continue" in the tutorial documentation

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 4.0 -> 5.0
pull_requests: +21310
pull_request: https://github.com/python/cpython/pull/22255

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[issue41780] Generic Alias attributes nor in dir()

[Allan Daemon]

Allan Daemon  added the comment:

> I actually have no idea where dir() gets its information.

I will share what I find out already, so it may hopefully be helpful.

The dir function used is the general object.__dir__ function, defined in 
Objects/typeobject.c:type___dir___impl(), that just takes everything from 
__dict__ of the class and its bases.

But the GenericAlias is trying hard pretending to be the origin class, so when 
you ask for the __dict__, it gives the original class, not the GenericAlias:

>>> list[int].__dict__ == list.__dict__
True

There are also some other things that seems a bit strange, but it may just be 
right:

>>> list.__class__

>>> list[int].__class__


>>> type(list)

>>> type(list[int])


This happens because of the tp_getattro function 
genericaliasobject.c:ga_getattro(), that takes the attributes from the origin 
except for the following names, that are taken from the GenericAlias itself:
"__origin__",
"__args__",
"__parameters__",
"__mro_entries__",
"__reduce_ex__",
"__reduce__",

So, when the dir() is getting the __dict__, it gets list.__dict__ and base 
(object) instead of GenericAlias. Looking the ga_getattro() calls when dir() is 
fired, it also gets the __class__ attribute after getting the __dict__. Adding 
one or another makes the dir() showing up the GenericAlias attributes, but 
others went missing.

An idea to solve this spefic issue could be overriding the __dir__ method, 
something like this python code (written in c, of course):

def __dir__(self):
r = super().__dir__()
return r + attribute_names_list + method_names_list


But I wonder what else should not be forwarded to origin.

--
components: +Interpreter Core -Documentation, Library (Lib)

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[issue41788] enhancement: add assertDuration context manager to unittest module

[Steven D'Aprano]

Steven D'Aprano  added the comment:

Matt, you can add this to your own unit tests by just subclassing 
unittest.TestCase and adding a new assertDuration method. Copy the existing 
method's implementations (its open source and you should have the source code 
already, but if not you can find it here:

https://github.com/python/cpython/blob/3.8/Lib/unittest/__init__.py

If you are looking for some timing code to use (in case you don't already have 
your own) you can try this:

https://github.com/ActiveState/code/tree/master/recipes/Python/577896_Benchmark_code

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[issue41566] Include much faster DEFLATE implementations in Python's gzip and zlib libraries. (isa-l)

[Ruben Vorderman]

Ruben Vorderman  added the comment:

Hi, thanks all for the comments and the help.

I have created the bindings using Cython. The project is still a work in 
progress as of this moment. I leave the link here for future reference.

Special thanks for the Cython developers for enabling these bindings.

https://github.com/rhpvorderman/python-isal

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status: open -> closed

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[issue41788] enhancement: add assertDuration context manager to unittest module

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:

Thanks for the proposal Matthew, unfortunately, this addition is not reliable 
enough for the standard library and OTOH can be easily implemented in-situ for 
the users that know what the limitations are.

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[issue41788] enhancement: add assertDuration context manager to unittest module

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


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[issue41788] enhancement: add assertDuration context manager to unittest module

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

I concur with Pablo. It is too unreliable.

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[issue41792] No (public) way to dynamically introspect if an annotation is a TypedDict

[Patrick Reader]

Change by Patrick Reader :


--
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pull_requests: +21309
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/22254

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[issue41792] No (public) way to dynamically introspect if an annotation is a TypedDict

[Patrick Reader]

New submission from Patrick Reader :

See https://github.com/python/typing/issues/751

--
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messages: 376931
nosy: pxeger
priority: normal
severity: normal
status: open
title: No (public) way to dynamically introspect if an annotation is a TypedDict

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[issue41788] enhancement: add assertDuration context manager to unittest module

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:

I think this can be very error prone because a particular operation could be 
interrupted by GIL switching in the middle of the context manager and be 
reported as taking much more than the execution of the code itself is taking. 
This will be very confused to users that expect it to "just work"

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[issue41783] Standard Color class

[Mertcan]

Mertcan  added the comment:

For example, consider the libraries of stdlib and PyPI that are available now 
and may be in the future. In libraries like Tkinter or Turtle, a universal 
color class can make the code clearer. Color operations can also be performed 
by representing the Color class. For example, deriving a CLI color code from 
the RGB values ​​it represents. Doesn't such a thing provide more advanced 
possibilities for the existing cli library (cmd) and reduce the need for PyPI 
API?

I think this can provide a common use for WEB and GUI libraries. It can also be 
beneficial in terms of performance as it can reduce the number of parameters 
for most functions.

Python is a programming language widely used as CLI. With a built-in color 
library, wouldn't we increase the appeal and language coverage? I see that 
there are many libraries on PyPI regarding colors, and most of them are built 
on CLI. Some of these are really used too much.

We often encounter issues like "How can I print in color in Console?" in places 
like Stackoverflow.

I think that many color-related or color libraries do not have a color class on 
stlib, so it might be too crowded for them to make a color class for 
themselves, especially when using multiple color-oriented libraries. Even if 
they don't make a special class for them, the number of parameters will 
naturally be higher. However, I think a standard color class can prevent all of 
these and increase readability.

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