Change by Andrew Svetlov :
--
keywords: +patch
pull_requests: +17473
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/18081
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Andrew Svetlov added the comment:
New changeset a96e06db77dcbd3433d39761ddb4615d7d96284a by Andrew Svetlov in
branch 'master':
bpo-39386: Prevent double awaiting of async iterator (GH-18081)
https://github.com/python/cpython/commit/a96e06db77dcbd3433d39761ddb461
Change by Andrew Svetlov :
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Change by Andrew Svetlov :
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resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Andrew Svetlov added the comment:
The latest example releases allocated python objects.
The memory is returned to allocator which, in turn, can hold it for a while.
The allocator is not controlled by Python API.
Anyway, if an explicit executor solves your needs -- please just use it
Andrew Svetlov added the comment:
Serhiy is right, I doubt if we can do something here.
A function address is a part of its __repr__() output.
--
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Andrew Svetlov added the comment:
-1.
I rather suggest updating telethon example in the following matter:
async with main():
with TelegramClient('anon', api_id, api_hash) as client:
await client.send_message('me', 'Hello, myself!')
You PR brings more
Andrew Svetlov added the comment:
A client that creates a loop implicitly in the constructor is a weird design
from my perspective.
You are free to use it, sure -- but please let us keep the freedom to not
support such corner cases by asyncio.run()
Sorry, I don't know the telethon li
Andrew Svetlov added the comment:
Explicit error is better than error-prone design.
Think that we will deprecate asyncio.get_event_loop() and the loop
instantiation on-demand in the main thread.
--
resolution: -> rejected
stage: patch review -> resolved
status: open -&g
Andrew Svetlov added the comment:
New changeset 90d9ba6ef10af32e8dfe0649789c3a8ccf419e95 by Andrew Svetlov in
branch 'master':
bpo-34793: Drop old-style context managers in asyncio.locks (GH-17533)
https://github.com/python/cpython/commit/90d9ba6ef10af32e8dfe0649789c3a
Change by Andrew Svetlov :
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Change by Andrew Svetlov :
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resolution: -> wont fix
status: open -> closed
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New submission from Andrew Svetlov :
Yuri proposed it for Python 3.8 but at that time the change was premature.
Now we can reconsider it for 3.9
The problem is that asyncio.get_event_loop() not only returns a loop but also
creates it on-demand if the thread is main and the loop doesn't
Andrew Svetlov added the comment:
Currently, I'm talking about adding a deprecation only.
The asyncio.get_event_loop() function will stay in Python for a while in
deprecated status. I don't know the exact period but it should be 3 releases at
least I guess, with possibly exte
Andrew Svetlov added the comment:
Serhiy, maybe I had not understood your proposal properly.
If you are asking about deprecating get_event_loop() call from outside of async
code but implicit call get_running_loop() without a warning if called from
async function -- it sounds like a
Change by Andrew Svetlov :
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components: +asyncio
nosy: +yselivanov
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status: open -> closed
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Change by Andrew Svetlov :
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assignee: -> asvetlov
nosy: +asvetlov
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Change by Andrew Svetlov :
--
keywords: +patch
pull_requests: +17831
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/18457
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Andrew Svetlov added the comment:
Victor, sorry.
I spent about 4 days in total trying to figure out what is the reason for
hanging.
I see that the signal handler is installed; but, in a rare situation, it is not
called when the process is killed.
If I reduce an amount of code executed in a
Andrew Svetlov added the comment:
The ship has sailed, this change breaks a lot of existing code without a strong
reason.
I recall very many cases in third-party libraries and commercial applications
where a negative argument for asyncio.sleep() is processed as asyncio.sleep(0)
without
Andrew Svetlov added the comment:
Not so easy to find a satisfactory generic approach.
An argument can also be 10 MiB length bytes array, a dictionary with 10,000
elements, HTML page, name it.
All these objects are printable but their representation is too verbose.
Task can have a dozen of
Andrew Svetlov added the comment:
The second solution doesn't help with breaking infinite loops like
while True:
pass
We need a more robust idea.
--
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Andrew Svetlov added the comment:
>From my understanding, the issue is still desirable but we have a lack of
>resources.
Regarding the patch for tornado, using selectors.SelectSelector for
implementing add_reader()/remove_reader() and add_writer()/remove_writer() in
ProactorEventLoop
Andrew Svetlov added the comment:
I'm not sure.
Logging can pollute the logger and make it almost useless.
Most of mentioned errno codes are programming errors, a few may happen due
network issues.
Would you share what reasons did you ob
Andrew Svetlov added the comment:
For server applications, the reverse proxy in front of the application can
limit the connection limit.
It is a good workaround because the proxy is required (and most likely is used
already) for any non-trivial server app
Change by Andrew Svetlov :
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Andrew Svetlov added the comment:
Thanks, Ido
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Andrew Svetlov added the comment:
The behavior is intentional and follows asyncio.run() semantics.
Moreover, every test should have a separate event loop instance, this is
stressed by IsolatedAsyncioTestCase class name
--
resolution: -> wont fix
stage: -> resolved
status
Andrew Svetlov added the comment:
asyncio doesn't kill subprocess by timeout, that's why test1() doesn't work.
The kill is done by signal sending which is asynchronous. That's why test2 may
fail at "FAIL(3)" point sometimes.
1-second sleep is enough to stop t
Andrew Svetlov added the comment:
This is a very interesting question.
In asyncio, task cancellation is not executed on `task.cancel()` call
immediately but the task is *marked* for cancellation.
The actual cancellation requires a context switch (await asyncio.sleep(0) or
similar) to
Change by Andrew Svetlov :
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resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Andrew Svetlov added the comment:
I consider a free type for the default as an implementation detail, not the
encouraged approach.
Since the value is always a string, using the same type for the default sounds
like a sane design for me.
--
nosy: +asvetlov
Andrew Svetlov added the comment:
I'm sorry. but loop.set_signal_handler() method doesn't exist.
--
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Andrew Svetlov added the comment:
Assuming you mean loop.add_signal_handler() method, I would say that a
minute-long delay is a sign of long blocking calls in your program.
Typical asyncio program blocks the loop for 1-10 milliseconds at most, and
signal handlers are called with this delay
Andrew Svetlov added the comment:
Other threads are not related.
Speaking about the main thread that runs an event loop with the signal handler
installed -- the handler is executed along with other async code.
If the loop executes some user-provides async task -- it executes the signal
Change by Andrew Svetlov :
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Andrew Svetlov added the comment:
New changeset 4482337decdbd0c6e2150346a68b3616bda664aa by Lidi Zheng in branch
'master':
bpo-39764: Make Task.get_stack accept ag_frame (#18669)
https://github.com/python/cpython/commit/4482337decdbd0c6e2150346a68b36
Change by Andrew Svetlov :
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Andrew Svetlov added the comment:
Would somebody be a champion for the issue?
--
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Andrew Svetlov added the comment:
New changeset f5a19ead4ba8c81cc27d5a530f830f4709ce240e by Soumendra Ganguly in
branch 'master':
bpo-41818: Make test_openpty() avoid unexpected success due to number of rows
and/or number of columns being == 0. (GH-23526)
https://github.com/pyth
Andrew Svetlov added the comment:
New changeset e4fe303b8cca525e97d44e80c7e53bdab9dd9187 by Yurii Karabas in
branch 'master':
bpo-42392: Remove loop parameter from asyncio.tasks and asyncio.subprocess
(GH-23521)
https://github.com/python/cpyt
Change by Andrew Svetlov :
--
resolution: -> wont fix
stage: -> resolved
status: open -> closed
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___
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Andrew Svetlov added the comment:
Partially addressed by https://github.com/python/cpython/pull/21735
--
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Python tracker
<https://bugs.python.org/issue42
Change by Andrew Svetlov :
--
title: remove the 'loop' parameter from __init__ in all classes in
asyncio.locks -> remove the deprecated 'loop' parameter asyncio API
___
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Andrew Svetlov added the comment:
Fixed by #42392
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
superseder: -> remove the deprecated 'loop' parameter asyncio API
versions: +Python 3.10 -Python 3.9
Change by Andrew Svetlov :
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Andrew Svetlov added the comment:
New changeset 8085f742f4adfbc85f13fc734dfab036aa23acfb by Zackery Spytz in
branch 'master':
bpo-34215: Clarify IncompleteReadError message when "expected" is None
(GH-21925)
https://github.com/python/cpython/commit/8085f742f4adfbc85f13
Change by Andrew Svetlov :
--
versions: +Python 3.8, Python 3.9
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Andrew Svetlov added the comment:
Can we close the issue?
--
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___
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Andrew Svetlov added the comment:
New changeset 4498e98a6bdf017d3b65fa679baf4c797909beb6 by Miss Islington (bot)
in branch '3.8':
bpo-34215: Clarify IncompleteReadError message when "expected" is None
(GH-21925) (#23540)
https://github.com/p
Andrew Svetlov added the comment:
New changeset d41ec65ab7411e877ca33d05e8c900feca530635 by Zackery Spytz in
branch 'master':
bpo-42489: Fix the signature for list.sort() in the tutorial (GH-23538)
https://github.com/python/cpython/commit/d41ec65ab7411e877ca33d05e8c900
Andrew Svetlov added the comment:
New changeset df6c8bcffef3380869c8f76317610ce452880b25 by Miss Islington (bot)
in branch '3.9':
bpo-34215: Clarify IncompleteReadError message when "expected" is None
(GH-21925) (GH-23539)
https://github.com/p
Change by Andrew Svetlov :
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Andrew Svetlov added the comment:
Fixing a non-broken thing is not a world-class idea, I think.
--
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Change by Andrew Svetlov :
--
assignee: -> docs@python
components: +Documentation -macOS
nosy: +docs@python
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.10, Python 3.8
___
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Andrew Svetlov added the comment:
Both mentioned links have the correct code.
They use sync __aiter__ and async __anext__
--
resolution: -> out of date
stage: -> resolved
status: open -> closed
___
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Andrew Svetlov added the comment:
New changeset 74311aeb45b52cc145d27d9fca99f01874d6882d by Soumendra Ganguly in
branch 'master':
bpo-41818: Fix test_master_read() so that it succeeds on all platforms that
either raise OSError or return b"" upon reading from mas
Andrew Svetlov added the comment:
You are right.
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Andrew Svetlov added the comment:
New changeset 86150d39c888579b65841f4391d054b7b3eff9f2 by Yurii Karabas in
branch 'master':
bpo-42392: Remove deprecated loop parameter from docs (GH-23552)
https://github.com/python/cpython/commit/86150d39c888579b65841f4391d054
Andrew Svetlov added the comment:
Thanks for your help!
--
resolution: -> fixed
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status: open -> closed
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Andrew Svetlov added the comment:
This is a deliberate decision.
An exception in handling one client connection should not break another
connected client.
--
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Andrew Svetlov added the comment:
Agree, not a bug.
--
resolution: -> not a bug
stage: -> resolved
status: open -> closed
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Andrew Svetlov added the comment:
You can use try/except in handler() and dispatch the exception whatever you
want.
It doesn't require a new asyncio version, debug-only flag, etc.
--
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Andrew Svetlov added the comment:
I understand the issue as the following:
1. You don't save the result of `asyncio.create_task()` somewhere.
The task object is dereferenced and thus you see a warning.
2. With PYTHONASYNCIODEBUG on the task is referenced also by internal debug
stru
Andrew Svetlov added the comment:
Moreover, the issue is outdated.
asyncio.CancelledError is not an alias of concurrent.futures.CancelledError
starting from Python 3.8
Unfortunately, we should make this not 100% backward compatible change.
--
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Change by Andrew Svetlov :
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Andrew Svetlov added the comment:
Sorry, this issue is not reproduced on 3.8-3.9, 3.7 is in security mode.
The issue doesn't belong to the security set.
Closing.
--
resolution: -> out of date
stage: -> resolved
status: open -> closed
Andrew Svetlov added the comment:
Thanks for the report.
I didn't test but looks like `outer.exception()` call can suppress the message
about not retrieved exception.
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Andrew Svetlov added the comment:
Reporting what? Please elaborate.
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Change by Andrew Svetlov :
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Andrew Svetlov added the comment:
New changeset b32d8b4f9bcd2e7d11240b6b9de0262cf8f5e09d by Matthias Bussonnier
in branch 'master':
bpo-42644: Validate values in logging.disable() (#23786)
https://github.com/python/cpython/commit/b32d8b4f9bcd2e7d11240b6b9de026
Change by Andrew Svetlov :
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.10, Python 3.8, Python 3.9 -Python 3.7
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Andrew Svetlov added the comment:
New changeset 66d3b589c44fcbcf9afe1e442d9beac3bd8bcd34 by Chris Jerdonek in
branch 'master':
bpo-38323: Add guard clauses in MultiLoopChildWatcher. (#22756)
https://github.com/python/cpython/commit/66d3b589c44fcbcf9afe1e442d9bea
Andrew Svetlov added the comment:
New changeset ba760f3710eccdfae2b680a5f94fe0160ddb1536 by pxinwr in branch
'master':
bpo-31904: Skip some asyncio tests on VxWorks (#23815)
https://github.com/python/cpython/commit/ba760f3710eccdfae2b680a5f94fe0160ddb1536
--
nosy:
Andrew Svetlov added the comment:
The traceback contains frames from asyncio internal machinery, that's why the
traceback is long.
IFIAK Python standard library never filters such calls, asyncio is not an
exception.
On the other hand, well-known pytest library supports `__tracebackh
Andrew Svetlov added the comment:
New changeset d90ff376813843310a6f9ccc96551fa1521e8fef by Matt Fowler in branch
'master':
BPO-42703: Fix incorrect documentation links for asyncio.Event (GH-23881)
https://github.com/python/cpython/commit/d90ff376813843310a6f9ccc96551f
Change by Andrew Svetlov :
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Andrew Svetlov added the comment:
I agree with Yuri.
Usually, you don't need overriding of the default exception handler.
Indeed, if you really need this low-level API I see nothing wrong with
`asyncio.get_running_loop()` call.
--
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Change by Andrew Svetlov :
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Andrew Svetlov added the comment:
Remi is correct.
Closing the issue.
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Andrew Svetlov added the comment:
The allowance to wait for the future object multiple times is settled in stone.
This cannot be changed without breaking very many codes.
So yes, asyncio guarantees that the feature is settled in stone. If set_value()
/ set_exception() was called, the value
Change by Andrew Svetlov :
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Andrew Svetlov added the comment:
Thank you very much, Ned!
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Andrew Svetlov added the comment:
Python is a volunteer-driven project.
The documentation translation is provided by champions who does this hard work
for free.
You can join the team and maintain the Python Russian Translation :)
Sorry, to keep the discussion productive I should remind our
Andrew Svetlov added the comment:
New changeset c3442fd8a7f6e34ba888efea085c3701b75c0b71 by Miss Skeleton (bot)
in branch '3.9':
bpo-41959: Fix grammar around class asyncio.MultiLoopChildWatcher text
(GH-22580) (#22865)
https://github.com/python/cpyt
Change by Andrew Svetlov :
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Andrew Svetlov added the comment:
I cannot reproduce on 3.9 but 3.8.6 crashes on `repr`:
File
"/home/andrew/.pyenv/versions/3.8.6/lib/python3.8/asyncio/base_futures.py",
line 31 in format_cb
File
"/home/andrew/.pyenv/versions/3.8.6/lib/python3.8/asyncio/base_futures.p
Change by Andrew Svetlov :
--
type: -> crash
versions: +Python 3.10, Python 3.7
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Andrew Svetlov added the comment:
Update: the bug is present in all supported Python versions bug sometimes may
be hidden by race conditions.
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Change by Andrew Svetlov :
--
keywords: +patch
pull_requests: +21934
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/23020
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Andrew Svetlov added the comment:
The fix is ready
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Andrew Svetlov added the comment:
New changeset 3d86d090dcbbdfdd3e5a5951cab30612d6131222 by Jakub Stasiak in
branch 'master':
bpo-42230: Improve asyncio documentation regarding accepting sets vs iterables
(GH-23073)
https://github.com/python/cpyt
Change by Andrew Svetlov :
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
versions: -Python 3.6, Python 3.7
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Andrew Svetlov added the comment:
New changeset ad37c66adcd474e3d42a51c63ecb6a54ca2d23f2 by Jakub Stasiak in
branch '3.8':
[3.8] bpo-42230: Improve asyncio documentation regarding accepting sets vs
iterables (GH-23073) (GH-23105)
https://github.com/python/cpyt
Andrew Svetlov added the comment:
New changeset 178695b7aee7a7aacd49a3086060e06347d1e556 by Kazantcev Andrey in
branch 'master':
bpo-40816 Add AsyncContextDecorator class (GH-20516)
https://github.com/python/cpython/commit/178695b7aee7a7aacd49a3086060e06347d1e556
--
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Change by Andrew Svetlov :
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stage: patch review -> resolved
status: open -> closed
versions: +Python 3.10 -Python 3.9
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Andrew Svetlov added the comment:
New changeset a117167d8dc8fa673a4646f509551c7950f824e5 by Tom Gringauz in
branch 'master':
bpo-41543: contextlib.nullcontext can fill in for an async context manager
(GH-21870)
https://github.com/python/cpyt
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