[issue45996] Worse error from asynccontextmanager in Python 3.10
Thomas Grainger added the comment: > Actually I don't agree with Thomas's logic... his argument feels like > consistency for its own sake. Do you expect sync and async contextmanagers to act differently? Why would sync contextmanagers raise AttributeError and async contextmanagers raise a RuntimeError? If it's sensible to guard against invalid re-entry for async contextmanagers then I think it's sensible to apply the same guard to sync contextmanagers. -- ___ Python tracker <https://bugs.python.org/issue45996> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue38415] @asynccontextmanager decorated functions are not callable like @contextmanager
Change by Thomas Grainger : -- nosy: +graingert nosy_count: 3.0 -> 4.0 pull_requests: +28454 pull_request: https://github.com/python/cpython/pull/30233 ___ Python tracker <https://bugs.python.org/issue38415> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue38415] @asynccontextmanager decorated functions are not callable like @contextmanager
Thomas Grainger added the comment: actually it was already done in 13 months! -- ___ Python tracker <https://bugs.python.org/issue38415> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue46522] concurrent.futures.__getattr__ raises the wrong AttributeError message
New submission from Thomas Grainger :
>>> import types
>>> types.ModuleType("concurrent.futures").missing_attribute
Traceback (most recent call last):
File "", line 1, in
AttributeError: module 'concurrent.futures' has no attribute 'missing_attribute'
>>> import concurrent.futures
>>> concurrent.futures.missing_attribute
Traceback (most recent call last):
File "", line 1, in
File
"/home/graingert/miniconda3/lib/python3.9/concurrent/futures/__init__.py", line
53, in __getattr__
raise AttributeError(f"module {__name__} has no attribute {name}")
AttributeError: module concurrent.futures has no attribute missing_attribute
--
messages: 411611
nosy: graingert
priority: normal
pull_requests: 29069
severity: normal
status: open
title: concurrent.futures.__getattr__ raises the wrong AttributeError message
versions: Python 3.10, Python 3.11, Python 3.9
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[issue46522] concurrent.futures.__getattr__ raises the wrong AttributeError message
Thomas Grainger added the comment: this also applies to io and _pyio -- ___ Python tracker <https://bugs.python.org/issue46522> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44863] Allow TypedDict to inherit from Generics
Thomas Grainger added the comment: there's a thread on typing-sig for this now: https://mail.python.org/archives/list/typing-...@python.org/thread/I7P3ER2NH7SENVMIXK74U6L4Z5JDLQGZ/#I7P3ER2NH7SENVMIXK74U6L4Z5JDLQGZ -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue44863> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue42752] multiprocessing Queue leaks a file descriptor associated with the pipe writer (#33081 still a problem)
Change by Thomas Grainger : -- nosy: +graingert, vstinner ___ Python tracker <https://bugs.python.org/issue42752> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue46824] use AI_NUMERICHOST | AI_NUMERICSERV to skip getaddrinfo thread in asyncio
New submission from Thomas Grainger : now that the getaddrinfo lock has been removed on all platforms the numeric only host resolve in asyncio could be moved back into BaseEventLoop.getaddrinfo -- components: asyncio messages: 413699 nosy: asvetlov, graingert, yselivanov priority: normal severity: normal status: open title: use AI_NUMERICHOST | AI_NUMERICSERV to skip getaddrinfo thread in asyncio type: enhancement ___ Python tracker <https://bugs.python.org/issue46824> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue46824] use AI_NUMERICHOST | AI_NUMERICSERV to skip getaddrinfo thread in asyncio
Change by Thomas Grainger : -- keywords: +patch pull_requests: +29627 stage: -> patch review pull_request: https://github.com/python/cpython/pull/31497 ___ Python tracker <https://bugs.python.org/issue46824> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue46824] use AI_NUMERICHOST | AI_NUMERICSERV to skip getaddrinfo thread in asyncio
Thomas Grainger added the comment: hello, it's actually a bit of a round about context, but it was brought up on a tornado issue where I was attempting to port the asyncio optimization to tornado: https://github.com/tornadoweb/tornado/issues/3113#issuecomment-1041019287 I think it would be better to use this AI_NUMERICHOST | AI_NUMERICSERV optimization from trio everywhere instead -- ___ Python tracker <https://bugs.python.org/issue46824> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue46827] asyncio SelectorEventLoop.sock_connect fails with a UDP socket
New submission from Thomas Grainger :
the following code:
import socket
import asyncio
async def amain():
with socket.socket(family=socket.AF_INET, proto=socket.IPPROTO_UDP,
type=socket.SOCK_DGRAM) as sock:
sock.setblocking(False)
await asyncio.get_running_loop().sock_connect(sock, ("google.com",
"443"))
asyncio.run(amain())
fails with:
Traceback (most recent call last):
File "/home/graingert/projects/test_foo.py", line 9, in
asyncio.run(amain())
File "/usr/lib/python3.10/asyncio/runners.py", line 44, in run
return loop.run_until_complete(main)
File "/usr/lib/python3.10/asyncio/base_events.py", line 641, in
run_until_complete
return future.result()
File "/home/graingert/projects/test_foo.py", line 7, in amain
await asyncio.get_running_loop().sock_connect(sock, ("google.com", "443"))
File "/usr/lib/python3.10/asyncio/selector_events.py", line 496, in
sock_connect
resolved = await self._ensure_resolved(
File "/usr/lib/python3.10/asyncio/base_events.py", line 1395, in
_ensure_resolved
return await loop.getaddrinfo(host, port, family=family, type=type,
File "/usr/lib/python3.10/asyncio/base_events.py", line 855, in getaddrinfo
return await self.run_in_executor(
File "/usr/lib/python3.10/concurrent/futures/thread.py", line 58, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/lib/python3.10/socket.py", line 955, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -7] ai_socktype not supported
--
components: asyncio
messages: 413709
nosy: asvetlov, graingert, yselivanov
priority: normal
severity: normal
status: open
title: asyncio SelectorEventLoop.sock_connect fails with a UDP socket
versions: Python 3.10, Python 3.11, Python 3.9
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[issue46827] asyncio SelectorEventLoop.sock_connect fails with a UDP socket
Change by Thomas Grainger : -- keywords: +patch pull_requests: +29629 stage: -> patch review pull_request: https://github.com/python/cpython/pull/31499 ___ Python tracker <https://bugs.python.org/issue46827> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45390] asyncio.Task doesn't propagate CancelledError() exception correctly.
Thomas Grainger added the comment:
there could be multiple messages here
perhaps it could be:
```
finally:
# Must reacquire lock even if wait is cancelled
cancelled = []
while True:
try:
await self.acquire()
break
except exceptions.CancelledError as e:
cancelled.append(e)
if len(cancelled) > 1:
raise ExceptionGroup("Cancelled", cancelled)
if cancelled:
raise cancelled[0]
```
--
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[issue43923] Can't create generic NamedTuple as of py3.9
Thomas Grainger added the comment: The main advantage for my usecase is support for heterogeneous unpacking On Sat, Mar 5, 2022, 6:04 PM Alex Waygood wrote: > > Alex Waygood added the comment: > > I sense we'll have to agree to disagree on the usefulness of NamedTuples > in the age of dataclasses :) > > For me, I find the simplicity of the underlying idea behind namedtuples — > "tuples with some properties bolted on" — very attractive. Yes, standard > tuples are more performant, but it's great to have a tool in the arsenal > that's essentially the same as a tuple (and is backwards-compatible with a > tuple, for APIs that require a tuple), but can also, like dataclasses, be > self-documenting. (You're right that DoneAndNotDoneFutures isn't a great > example of this.) > > But I agree that this shouldn't be a priority if it's hard to accomplish; > and there'll certainly be no complaints from me if energy is invested into > making dataclasses faster. > > -- > > ___ > Python tracker > <https://bugs.python.org/issue43923> > ___ > -- ___ Python tracker <https://bugs.python.org/issue43923> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47025] bytes do not work on sys.path
New submission from Thomas Grainger : importing a module with bytes in `sys.path` fails with: File "", line 182, in _path_isabs TypeError: startswith first arg must be bytes or a tuple of bytes, not str (see reproducer in attached demo.py) however `sys.path` is documented as supporting bytes "Only strings and bytes should be added to sys.path; all other data types are ignored during import." https://docs.python.org/3/library/sys.html?highlight=Only%20strings%20and%20bytes#sys.path bytes are allowed in PathFinder._find_spec https://github.com/python/cpython/blob/2cf7f865f099db11cc6903b334d9c376610313e8/Lib/importlib/_bootstrap_external.py#L1460-L1462 but perhaps they should be ignored or explicitly fsdecoded ? see also: https://bugs.python.org/issue32642 https://github.com/python/importlib_metadata/issues/372#issuecomment-1067799424 -- files: demo.py messages: 415233 nosy: graingert priority: normal severity: normal status: open title: bytes do not work on sys.path Added file: https://bugs.python.org/file50678/demo.py ___ Python tracker <https://bugs.python.org/issue47025> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47025] bytes do not work on sys.path
Change by Thomas Grainger : -- components: +Library (Lib) versions: +Python 3.10, Python 3.11, Python 3.9 ___ Python tracker <https://bugs.python.org/issue47025> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47025] bytes do not work on sys.path
Change by Thomas Grainger : -- keywords: +patch pull_requests: +29993 stage: -> patch review pull_request: https://github.com/python/cpython/pull/31897 ___ Python tracker <https://bugs.python.org/issue47025> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47025] bytes do not work on sys.path
Thomas Grainger added the comment:
this is a regression from 3.2:
```
Python 3.2.6 (default, Jan 18 2016, 19:21:14)
[GCC 4.9.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tempfile
>>> tempfile.TemporaryDirectory()
>>> v = _
>>> tmp_dir = str(v.__enter__())
>>> tmp_dir
'/tmp/tmpd4jzut'
>>> f = open(tmp_dir + "/module.py", "w")
>>> f.write("def function():\nreturn 1\n")
29
>>> f.close()
>>> import sys
>>> sys.path.append(tmp_dir.encode())
>>> import module
>>> module
>>>
```
--
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[issue47025] bytes do not work on sys.path
Thomas Grainger added the comment: https://docs.python.org/3/reference/import.html#path-entry-finders says "The encoding of bytes entries is determined by the individual path entry finders." see https://github.com/python/cpython/commit/82c1c781c7ee6496bd4c404b7ba972eed5dbcb12 -- ___ Python tracker <https://bugs.python.org/issue47025> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47025] bytes do not work on sys.path
Thomas Grainger added the comment: interestingly bytes filenames pointing to zip files on sys.path do support bytes (see zipfile_demo.py) -- Added file: https://bugs.python.org/file50679/zipfile_demo.py ___ Python tracker <https://bugs.python.org/issue47025> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47025] bytes do not work on sys.path
Thomas Grainger added the comment: zipimporter.zipimporter handles non-bytes paths here: https://github.com/python/cpython/blob/2cf7f865f099db11cc6903b334d9c376610313e8/Lib/zipimport.py#L65-L67 I think FileFinder should do the same -- ___ Python tracker <https://bugs.python.org/issue47025> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47026] BytesWarning in zipimport paths on sys.path
New submission from Thomas Grainger : importing from a bytes zipimport path on sys.path results in a BytesWarning: Comparison between bytes and string running the reproducer with `python -b` shows: python -b zipfile_demo.py :1345: BytesWarning: Comparison between bytes and string see also https://bugs.python.org/issue47025 -- components: Library (Lib) files: zipfile_demo.py messages: 415245 nosy: graingert priority: normal severity: normal status: open title: BytesWarning in zipimport paths on sys.path versions: Python 3.10, Python 3.11, Python 3.9 Added file: https://bugs.python.org/file50680/zipfile_demo.py ___ Python tracker <https://bugs.python.org/issue47026> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47025] bytes do not work on sys.path
Thomas Grainger added the comment: > I'd advocate for not supporting bytes paths and instead updating the > documentation to require strings. I've got PR GH-31934 started to do this -- message_count: 8.0 -> 9.0 pull_requests: +30026 pull_request: https://github.com/python/cpython/pull/31934 ___ Python tracker <https://bugs.python.org/issue47025> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47085] missing frame.f_lineno on JUMP_ABSOLUTE
New submission from Thomas Grainger : the following code prints: import sys import dis import pprint def demo(): for i in range(1): if i >= 0: pass class Tracer: def __init__(self): self.events = [] def trace(self, frame, event, arg): self.events.append((frame.f_lineno, frame.f_lasti, event)) frame.f_trace_lines = True frame.f_trace_opcodes = True return self.trace def main(): t = Tracer() old_trace = sys.gettrace() try: sys.settrace(t.trace) demo() finally: sys.settrace(old_trace) dis.dis(demo) pprint.pp(t.events) if __name__ == "__main__": sys.exit(main()) 7 0 LOAD_GLOBAL 0 (range) 2 LOAD_CONST 1 (1) 4 CALL_FUNCTION1 6 GET_ITER >>8 FOR_ITER 7 (to 24) 10 STORE_FAST 0 (i) 8 12 LOAD_FAST0 (i) 14 LOAD_CONST 2 (0) 16 COMPARE_OP 5 (>=) 18 POP_JUMP_IF_FALSE 11 (to 22) 9 20 NOP >> 22 JUMP_ABSOLUTE4 (to 8) 7 >> 24 LOAD_CONST 0 (None) 26 RETURN_VALUE [(6, -1, 'call'), (7, 0, 'line'), (7, 0, 'opcode'), (7, 2, 'opcode'), (7, 4, 'opcode'), (7, 6, 'opcode'), (7, 8, 'opcode'), (7, 10, 'opcode'), (8, 12, 'line'), (8, 12, 'opcode'), (8, 14, 'opcode'), (8, 16, 'opcode'), (8, 18, 'opcode'), (9, 20, 'line'), (9, 20, 'opcode'), (None, 22, 'opcode'), (7, 8, 'line'), (7, 8, 'opcode'), (7, 24, 'opcode'), (7, 26, 'opcode'), (7, 26, 'return')] but I'd expect (9, 22, 'opcode') instead of (None, 22, 'opcode'), -- messages: 415697 nosy: graingert priority: normal severity: normal status: open title: missing frame.f_lineno on JUMP_ABSOLUTE versions: Python 3.10, Python 3.11 ___ Python tracker <https://bugs.python.org/issue47085> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45563] inspect.getframeinfo() doesn't handle frames without lineno
Change by Thomas Grainger : -- keywords: +patch nosy: +graingert nosy_count: 4.0 -> 5.0 pull_requests: +30134 stage: resolved -> patch review pull_request: https://github.com/python/cpython/pull/32044 ___ Python tracker <https://bugs.python.org/issue45563> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue43944] Processes in Python 3.9 exiting with code 1 when It's created inside a ThreadPoolExecutor
Thomas Grainger added the comment:
the problem is multiprocessing/process is calling threading._shutdown which
tries to join its own thread, because concurrent.futures.thread._threads_queues
contains the main thread in the subprocess
File
"/home/graingert/miniconda3/envs/dask-distributed/lib/python3.10/multiprocessing/process.py",
line 333, in _bootstrap
threading._shutdown()
File
"/home/graingert/miniconda3/envs/dask-distributed/lib/python3.10/threading.py",
line 1530, in _shutdown
atexit_call()
File
"/home/graingert/miniconda3/envs/dask-distributed/lib/python3.10/concurrent/futures/thread.py",
line 31, in _python_exit
t.join()
File
"/home/graingert/miniconda3/envs/dask-distributed/lib/python3.10/threading.py",
line 1086, in join
raise RuntimeError("cannot join current thread")
--
nosy: +graingert
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[issue27071] unittest.TestCase.assertCountEqual is a very misleading name
Thomas Grainger added the comment: I think assertPermutation (without the "is") would be the best name -- ___ Python tracker <https://bugs.python.org/issue27071> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue27071] unittest.TestCase.assertCountEqual is a very misleading name
Change by Thomas Grainger : -- pull_requests: +15826 pull_request: https://github.com/python/cpython/pull/16228 ___ Python tracker <https://bugs.python.org/issue27071> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue27071] unittest.TestCase.assertCountEqual is a very misleading name
Thomas Grainger added the comment: While it may not appear to be a permutation, python already considers it one: graingert@onomastic:~$ cat test_assert_permutation.py import itertools import unittest from decimal import Decimal from fractions import Fraction class TestAssertPermutation(unittest.TestCase): def assertPermutation(self, a, b): return self.assertIn(tuple(a), itertools.permutations(b)) def test_do_not_look_like_permutations(self): self.assertPermutation( [Decimal(3), 5, Fraction(12, 4)], [3.0, 3, Fraction(15, 3)] ) if __name__ == "__main__": unittest.main() graingert@onomastic:~$ python3 test_assert_permutation.py -v test_do_not_look_like_permutations (__main__.TestAssertPermutation) ... ok -- Ran 1 test in 0.000s OK -- ___ Python tracker <https://bugs.python.org/issue27071> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44306] asyncio.from_thread
New submission from Thomas Grainger : create a asyncio.from_thread shortcut to run async functions from a thread started with asyncio.to_thread ``` def from_thread(async_func, /, *args, **kwargs): """Synchronously run function *async_func* in the event loop thread. Any *args and **kwargs supplied for this function are directly passed to *func*. Also, the current :class:`contextvars.Context` is propogated, allowing context variables from the main thread to be accessed in the separate thread. Return a concurrent.futures.Future to wait for the result from the event loop thread. ``` -- components: asyncio messages: 395054 nosy: asvetlov, graingert, yselivanov priority: normal severity: normal status: open title: asyncio.from_thread ___ Python tracker <https://bugs.python.org/issue44306> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44306] asyncio.from_thread
Thomas Grainger added the comment: """High-level support for working with threads in asyncio""" import functools import contextvars from . import events from . import tasks __all__ = "to_thread", "from_thread" class _Local(threading.local): loop = None _local = _Local() def _with_loop(loop, func, /, *args, **kwargs): _loop.loop = loop try: return func(*args, **kwargs) finally: _loop.loop = None async def to_thread(func, /, *args, **kwargs): """Asynchronously run function *func* in a separate thread. Any *args and **kwargs supplied for this function are directly passed to *func*. Also, the current :class:`contextvars.Context` is propogated, allowing context variables from the main thread to be accessed in the separate thread. Return a coroutine that can be awaited to get the eventual result of *func*. """ loop = events.get_running_loop() ctx = contextvars.copy_context() func_call = functools.partial(_with_loop, loop, ctx.run, func, *args, **kwargs) return await loop.run_in_executor(None, func_call) def _create_task(async_func, /, *args, **kwargs): return events.create_task(async_func(*args, **kwargs)) async def _with_context(ctx, async_func, /, *args, **kwargs): return await ctx.run(_create_task, async_func, *args, **kwargs) def from_thread(async_func, /, *args, **kwargs): """Synchronously run function *async_func* in the event loop thread. Any *args and **kwargs supplied for this function are directly passed to *func*. Also, the current :class:`contextvars.Context` is propogated, allowing context variables from the main thread to be accessed in the separate thread. Return a concurrent.futures.Future to wait for the result from the event loop thread. """ loop = _loop.loop if loop is None: raise RuntimeError( "asyncio.from_thread can only be run in a thread started by " "asyncio.to_thread" ) ctx = contextvars.copy_context() return tasks.run_coroutine_threadsafe(loop, _with_context(ctx, async_func, *args, **kwargs)) -- ___ Python tracker <https://bugs.python.org/issue44306> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44354] ssl deprecation warnings erganomics
New submission from Thomas Grainger : The ssl module OP_NO_* deprecation warning message is slightly wrong: The error message prints out "is deprecated is deprecated" because of an earlier format template There's a colon in the warning message `ssl module:` and that makes it difficult to use in simplefilter The NPN deprecation warnning raises a UserWarning instead of DeprecationWarning see also UserWarning: ssl module: NPN is deprecated, use ALPN instead -- messages: 395362 nosy: alex, christian.heimes, dstufft, graingert, janssen priority: normal pull_requests: 25197 severity: normal status: open title: ssl deprecation warnings erganomics versions: Python 3.10, Python 3.11 ___ Python tracker <https://bugs.python.org/issue44354> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44354] ssl deprecation warnings erganomics
Thomas Grainger added the comment: the "ssl module:" part of the warning message, I think, is redundant as it should be defined in the https://docs.python.org/3/library/warnings.html#warnings.warn_explicit module kwarg -- ___ Python tracker <https://bugs.python.org/issue44354> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44362] improve documentation of SSL deprecations
New submission from Thomas Grainger : > I can see in the 3.10 release notes, that ssl.PROTOCOL_TLS becomes > deprecated. Is there any further context explaining why, and what the > preferred usage is instead, so that I (and anyone else) can understand this a > bit more thoroughly? https://github.com/encode/httpx/issues/1670#issuecomment-857509311 -- messages: 395398 nosy: alex, christian.heimes, dstufft, graingert, janssen priority: normal severity: normal status: open title: improve documentation of SSL deprecations versions: Python 3.10, Python 3.11 ___ Python tracker <https://bugs.python.org/issue44362> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44362] improve documentation of SSL deprecations
Thomas Grainger added the comment: It's also confusing that other not deprecated flags are described in terms of this deprecated flag. These will need rewriting when the deprecated flag is removed -- ___ Python tracker <https://bugs.python.org/issue44362> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44354] ssl deprecation warnings erganomics
Thomas Grainger added the comment: it looks like OP_NO_SSLv2 and OP_NO_SSLv3 are not raising a DeprecationWarning ``` python310 -W error Python 3.10.0b2 (default, Jun 2 2021, 00:22:18) [GCC 9.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import ssl >>> ssl.SSLContext(ssl.PROTOCOL_TLS) Traceback (most recent call last): File "", line 1, in File "/usr/lib/python3.10/ssl.py", line 501, in __new__ self = _SSLContext.__new__(cls, protocol) DeprecationWarning: ssl module: PROTOCOL_TLS is deprecated >>> ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT) >>> c = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT) >>> c.options |= ssl.OP_NO_SSLv2 # no deprecation warning!? >>> c.options |= ssl.OP_NO_SSLv3 # no deprecation warning!? >>> c.options |= ssl.OP_NO_TLSv1 Traceback (most recent call last): File "", line 1, in File "/usr/lib/python3.10/ssl.py", line 621, in options super(SSLContext, SSLContext).options.__set__(self, value) DeprecationWarning: ssl module: Setting OP_NO_SSL* or SSL_NO_TLS* options is deprecated is deprecated ``` -- ___ Python tracker <https://bugs.python.org/issue44354> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44354] ssl deprecation warnings erganomics
Thomas Grainger added the comment: there should still be a deprecation warning so that 3.12 can raise AttributeError -- ___ Python tracker <https://bugs.python.org/issue44354> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44362] improve documentation of SSL deprecations
Thomas Grainger added the comment: > Would you like me to submit a PR for this simple patch? > > https://github.com/jdevries3133/cpython/commit/42d9bd7f97f03b49d4fc89780616704998492ac1 TLS_PROTOCOL_CLIENT and TLS_PROTOCOL_SERVER are defined in terms of the deprecated TLS_PROTOCOL, so now this makes the definition circular -- ___ Python tracker <https://bugs.python.org/issue44362> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44428] _ProactorBasePipeTransport.abort() after _ProactorBasePipeTransport.close() does not cancel writes
New submission from Thomas Grainger :
demo program:
import asyncio
import socket
import threading
async def amain():
family = socket.AddressFamily.AF_INET
sock = socket.socket(family, socket.SOCK_STREAM)
sock.settimeout(1)
sock.bind(('localhost', 0))
sock.listen()
host, port = sock.getsockname()[:2]
event = threading.Event()
def serve():
client, _ = sock.accept()
with client:
client.recv(1)
event.wait()
t = threading.Thread(target=serve, daemon=True)
t.start()
reader, writer = await asyncio.open_connection(host=host, port=port)
try:
while True:
writer.write(b"\x00" * 4096 * 682 * 2)
await asyncio.wait_for(writer.drain(), 2)
print("wrote")
except asyncio.TimeoutError:
print("timed out")
writer.close()
await asyncio.sleep(0)
writer.transport.abort()
print("waiting close")
await writer.wait_closed() # never finishes on ProactorEventLoop
print("closed")
event.set()
t.join()
asyncio.run(amain())
it looks like it was fixed for the selector eventloop in
https://github.com/python/cpython/commit/2546a177650264205e8a52b6836bc5b8c48bf085
but not for the proactor
https://github.com/python/cpython/blame/8fe57aacc7bf9d9af84803b69dbb1d66597934c6/Lib/asyncio/proactor_events.py#L140
--
components: asyncio
messages: 395896
nosy: asvetlov, graingert, yselivanov
priority: normal
severity: normal
status: open
title: _ProactorBasePipeTransport.abort() after
_ProactorBasePipeTransport.close() does not cancel writes
versions: Python 3.10, Python 3.8, Python 3.9
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[issue44446] linecache.getline TypeError when formatting tracebacks in stacks containing an async list comprehension
New submission from Thomas Grainger :
demo:
import traceback
import io
async def foo():
yield 1
traceback.print_stack(file=io.StringIO())
yield 2
async def bar():
return [chunk async for chunk in foo()]
next(bar().__await__(), None)
print("working!")
Traceback (most recent call last):
File "/home/graingert/projects/anyio/foo.py", line 13, in
next(bar().__await__(), None)
File "/home/graingert/projects/anyio/foo.py", line 10, in bar
return [chunk async for chunk in foo()]
File "/home/graingert/projects/anyio/foo.py", line -1, in
File "/home/graingert/projects/anyio/foo.py", line 6, in foo
traceback.print_stack(file=io.StringIO())
File "/usr/lib/python3.10/traceback.py", line 203, in print_stack
print_list(extract_stack(f, limit=limit), file=file)
File "/usr/lib/python3.10/traceback.py", line 224, in extract_stack
stack = StackSummary.extract(walk_stack(f), limit=limit)
File "/usr/lib/python3.10/traceback.py", line 379, in extract
f.line
File "/usr/lib/python3.10/traceback.py", line 301, in line
self._line = linecache.getline(self.filename, self.lineno).strip()
File "/usr/lib/python3.10/linecache.py", line 31, in getline
if 1 <= lineno <= len(lines):
TypeError: '<=' not supported between instances of 'int' and 'NoneType'
--
messages: 396014
nosy: graingert
priority: normal
severity: normal
status: open
title: linecache.getline TypeError when formatting tracebacks in stacks
containing an async list comprehension
versions: Python 3.10
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[issue44446] linecache.getline TypeError when formatting tracebacks in stacks containing an async list comprehension
Change by Thomas Grainger : -- nosy: +Mark.Shannon -nedbat ___ Python tracker <https://bugs.python.org/issue6> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44446] linecache.getline TypeError when formatting tracebacks in stacks containing an async list comprehension
Change by Thomas Grainger : -- nosy: +nedbat ___ Python tracker <https://bugs.python.org/issue6> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue33408] Enable AF_UNIX support in Windows
Change by Thomas Grainger : -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue33408> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44428] _ProactorBasePipeTransport.abort() after _ProactorBasePipeTransport.close() does not cancel writes
Change by Thomas Grainger : -- nosy: +gvanrossum ___ Python tracker <https://bugs.python.org/issue44428> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44428] _ProactorBasePipeTransport.abort() after _ProactorBasePipeTransport.close() does not cancel writes
Thomas Grainger added the comment: nosying the author of the selector_events fix -- ___ Python tracker <https://bugs.python.org/issue44428> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1462485] StopIteration raised in body of 'with' statement suppressed
Thomas Grainger added the comment: ``` import contextlib @contextlib.contextmanager def foo(): yield class StartIrritation(StopIteration): pass with foo(): raise StartIrritation ``` -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue1462485> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44566] StopIteration subclass raised in body of 'with' statement suppressed
New submission from Thomas Grainger : https://bugs.python.org/issue1462485 import contextlib @contextlib.contextmanager def foo(): yield class StartIrritation(StopIteration): pass with foo(): raise StartIrritation -- messages: 396979 nosy: graingert, ncoghlan, yselivanov priority: normal severity: normal status: open title: StopIteration subclass raised in body of 'with' statement suppressed versions: Python 3.10, Python 3.11, Python 3.6, Python 3.7, Python 3.8, Python 3.9 ___ Python tracker <https://bugs.python.org/issue44566> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1462485] StopIteration raised in body of 'with' statement suppressed
Thomas Grainger added the comment: apologies I meant to post this on a new ticket -- ___ Python tracker <https://bugs.python.org/issue1462485> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44566] StopIteration subclass raised in body of 'with' statement suppressed
Thomas Grainger added the comment:
This is the output:
```
Traceback (most recent call last):
File "/home/graingert/projects/close.py", line 5, in foo
yield
File "/home/graingert/projects/close.py", line 12, in
raise StartIrritation
__main__.StartIrritation
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/home/graingert/projects/close.py", line 11, in
with foo():
File "/usr/lib/python3.10/contextlib.py", line 151, in __exit__
self.gen.throw(type, value, traceback)
RuntimeError: generator raised StopIteration
```
Note that this was fixed in @contextlib.asynccontextmanager
```
import asyncio
import contextlib
@contextlib.asynccontextmanager
async def foo():
yield
class StartIrritation(StopIteration):
pass
async def amain():
try:
async with foo():
raise StartIrritation
except StartIrritation:
print("good")
except RuntimeError:
print("bad")
asyncio.run(amain())
```
--
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[issue44566] StopIteration subclass raised in body of 'with' statement suppressed
Change by Thomas Grainger : -- keywords: +patch pull_requests: +25590 stage: -> patch review pull_request: https://github.com/python/cpython/pull/27024 ___ Python tracker <https://bugs.python.org/issue44566> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44428] _ProactorBasePipeTransport.abort() after _ProactorBasePipeTransport.close() does not cancel writes
Change by Thomas Grainger : -- nosy: +lukasz.langa ___ Python tracker <https://bugs.python.org/issue44428> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44611] CPython uses deprecated randomness API
Thomas Grainger added the comment: https://docs.microsoft.com/en-us/windows/win32/seccng/cng-portal ? -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue44611> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44070] __file__ is now fully qualified in 3.8 and 3.9
Thomas Grainger added the comment: hello, just chiming in to let you know that this broke CI on twisted: https://github.com/twisted/twisted/pull/1628/ (As above for Chalice, I think this didn't actually break the framework itself, just the tests for the framework. ) do you know what the correct usage of importlib.util.spec_from_file_location is to match importlib.import_module ? I have a tree like this: . └── mypkg ├── demo.py ├── __init__.py └── __pycache__ ├── __init__.cpython-38.pyc └── __init__.cpython-39.pyc 2 directories, 4 files but I'm not sure how to get a spec for ./mypkg/demo.py: Python 3.9.6 (default, Jul 3 2021, 16:40:50) [GCC 9.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import sys >>> sys.path ['', '/usr/lib/python39.zip', '/usr/lib/python3.9', '/usr/lib/python3.9/lib-dynload', '/usr/local/lib/python3.9/dist-packages', '/usr/lib/python3/dist-packages'] >>> import os >>> os.getcwd() '/home/graingert/projects/syspath-tests' >>> import importlib.util >>> importlib.util.spec_from_file_location(name="mypkg.demo", >>> location="mypkg/demo.py") ModuleSpec(name='mypkg.demo', loader=<_frozen_importlib_external.SourceFileLoader object at 0x7fc94644bfd0>, origin='mypkg/demo.py') >>> import mypkg.demo >>> mypkg.demo.__spec__ ModuleSpec(name='mypkg.demo', loader=<_frozen_importlib_external.SourceFileLoader object at 0x7fc94645a160>, origin='/home/graingert/projects/syspath-tests/mypkg/demo.py') >>> -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue44070> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44686] use pkgutil.resolve_name in unittest.mock
New submission from Thomas Grainger : per https://bugs.python.org/issue12915 pkgutil.resolve_name was added for use in mock and other stdlib modules: > pydoc has locate and resolve, packaging has util.resolve_name, unittest has > something else, etc. -- messages: 397905 nosy: graingert priority: normal pull_requests: 25814 severity: normal status: open title: use pkgutil.resolve_name in unittest.mock versions: Python 3.11 ___ Python tracker <https://bugs.python.org/issue44686> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue43468] functools.cached_property incorrectly locks the entire descriptor on class instead of per-instance locking
Thomas Grainger added the comment: how about deprecating the functools.cached_property? -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue43468> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue43468] functools.cached_property incorrectly locks the entire descriptor on class instead of per-instance locking
Thomas Grainger added the comment: > using a per-descriptor `WeakKeyDictionary` to map the instance to locks > (which would of course not work - is there any way to map unhashable > instances weakly?) there's an issue for that too: https://bugs.python.org/issue44140 -- ___ Python tracker <https://bugs.python.org/issue43468> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37715] 2to3 set default encoding
Thomas Grainger added the comment: lib2to3 is deprecated and is pending removal, so I think this can be closed -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue37715> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44070] __file__ is now fully qualified in 3.8 and 3.9
Thomas Grainger added the comment: Yep that's the fix I went for in the end https://github.com/twisted/twisted/pull/1628/files#diff-8110fe13865c1f305bb999e82cd7514b2e7269f41087bd7ef39c3d6de508R105 -- ___ Python tracker <https://bugs.python.org/issue44070> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44908] recommend httpx as well as requests in http.client/urllib.request docs
New submission from Thomas Grainger : HTTPX is a fully featured HTTP client for Python 3, which provides sync and async APIs, and support for both HTTP/1.1 and HTTP/2. It's also broadly compatible and inspired by the requests API: https://github.com/encode/httpx/blob/master/docs/compatibility.md#requests-compatibility-guide Currently the project is looking to get a link from the docs to https://www.python-httpx.org/ here's the upstream issue https://github.com/encode/httpx/issues/1772 -- assignee: docs@python components: Documentation messages: 399494 nosy: docs@python, graingert priority: normal severity: normal status: open title: recommend httpx as well as requests in http.client/urllib.request docs versions: Python 3.10, Python 3.11 ___ Python tracker <https://bugs.python.org/issue44908> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44928] async generator missing unawaited coroutine warning
New submission from Thomas Grainger : demo program: ``` def test_async_fn(): async def async_fn(): pass async_fn() def test_async_gen_fn(): async def agen_fn(): yield agen_fn().aclose() agen_fn().asend(None) test_async_fn() test_async_gen_fn() ``` output: ``` /home/graingert/projects/anyio/foo.py:5: RuntimeWarning: coroutine 'test_async_fn..async_fn' was never awaited async_fn() RuntimeWarning: Enable tracemalloc to get the object allocation traceback ``` expected: ``` /home/graingert/projects/anyio/foo.py:5: RuntimeWarning: coroutine 'test_async_fn..async_fn' was never awaited async_fn() RuntimeWarning: Enable tracemalloc to get the object allocation traceback /home/graingert/projects/anyio/foo.py:12: RuntimeWarning: coroutine '' was never awaited agen_fn().aclose() RuntimeWarning: Enable tracemalloc to get the object allocation traceback /home/graingert/projects/anyio/foo.py:13: RuntimeWarning: coroutine '' was never awaited agen_fn().asend(None) RuntimeWarning: Enable tracemalloc to get the object allocation traceback ``` -- components: Interpreter Core messages: 399684 nosy: graingert priority: normal severity: normal status: open title: async generator missing unawaited coroutine warning versions: Python 3.10, Python 3.11, Python 3.6, Python 3.7, Python 3.8, Python 3.9 ___ Python tracker <https://bugs.python.org/issue44928> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44830] Broken Mozilla devguide link in "Dealing with Bugs" doc section
Thomas Grainger added the comment: It looks like it got archived here https://github.com/mdn/archived-content/blob/main/files/en-us/mozilla/qa/bug_writing_guidelines/index.html -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue44830> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44830] Broken Mozilla devguide link in "Dealing with Bugs" doc section
Thomas Grainger added the comment: Depends on the redirect type they create. If it's temporary we should keep the same URL, if it's permanent or otherwise has bookmark updating semantics we should update the URL to follow the redirect On Wed, 18 Aug 2021, 21:40 Jack DeVries, wrote: > > Jack DeVries added the comment: > > All right, consider the needle in the haystack officially found. This page > has the same content as the missing page: > > https://bugzilla.mozilla.org/page.cgi?id=bug-writing.html > > Thank you @buhtz for opening an issue with Mozilla; they are eventually > going to deploy a redirect to the link above from the old link: > https://github.com/mdn/content/issues/8036 > > So, we could go ahead and insert the link above which contains the same > content as before. Or, we can keep the call open for a new document. What > does everyone think? > > -- > > ___ > Python tracker > <https://bugs.python.org/issue44830> > ___ > -- ___ Python tracker <https://bugs.python.org/issue44830> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44962] asyncio.create_task weakrefset race condition
New submission from Thomas Grainger :
with the following demo script I can get a IndexError: pop from empty list
```
import itertools
import asyncio
import concurrent.futures
import sys
import threading
threads = 200
def test_all_tasks_threading() -> None:
async def foo() -> None:
await asyncio.sleep(0)
async def create_tasks() -> None:
for i in range(1000):
asyncio.create_task(foo())
await asyncio.sleep(0)
results = []
with concurrent.futures.ThreadPoolExecutor(threads) as tpe:
for f in concurrent.futures.as_completed(
tpe.submit(asyncio.run, create_tasks()) for i in range(threads)
):
results.append(f.result())
assert results == [None] * threads
def main():
for i in itertools.count():
test_all_tasks_threading()
print(f"worked {i}")
return 0
if __name__ == "__main__":
sys.exit(main())
```
```
worked 0
worked 1
worked 2
worked 3
worked 4
worked 5
worked 6
worked 7
worked 8
worked 9
worked 10
worked 11
worked 12
worked 13
worked 14
worked 15
worked 16
worked 17
worked 18
Traceback (most recent call last):
File "/home/graingert/projects/asyncio-demo/demo.py", line 36, in
sys.exit(main())
File "/home/graingert/projects/asyncio-demo/demo.py", line 30, in main
test_all_tasks_threading()
File "/home/graingert/projects/asyncio-demo/demo.py", line 24, in
test_all_tasks_threading
results.append(f.result())
File "/usr/lib/python3.9/concurrent/futures/_base.py", line 438, in result
return self.__get_result()
File "/usr/lib/python3.9/concurrent/futures/_base.py", line 390, in
__get_result
raise self._exception
File "/usr/lib/python3.9/concurrent/futures/thread.py", line 52, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/lib/python3.9/asyncio/runners.py", line 48, in run
loop.run_until_complete(loop.shutdown_asyncgens())
File "/usr/lib/python3.9/asyncio/base_events.py", line 621, in
run_until_complete
future = tasks.ensure_future(future, loop=self)
File "/usr/lib/python3.9/asyncio/tasks.py", line 667, in ensure_future
task = loop.create_task(coro_or_future)
File "/usr/lib/python3.9/asyncio/base_events.py", line 433, in create_task
task = tasks.Task(coro, loop=self, name=name)
File "/usr/lib/python3.9/_weakrefset.py", line 84, in add
self._commit_removals()
File "/usr/lib/python3.9/_weakrefset.py", line 57, in _commit_removals
discard(l.pop())
IndexError: pop from empty list
sys:1: RuntimeWarning: coroutine 'BaseEventLoop.shutdown_asyncgens' was never
awaited
Task was destroyed but it is pending!
task: >
```
here's a live demo on github actions:
https://github.com/graingert/asyncio-backport/runs/3380502247#step:5:90
--
components: asyncio
messages: 399969
nosy: asvetlov, graingert, yselivanov
priority: normal
severity: normal
status: open
title: asyncio.create_task weakrefset race condition
versions: Python 3.8, Python 3.9
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[issue44962] asyncio.create_task weakrefset race condition
Change by Thomas Grainger : -- versions: +Python 3.7 ___ Python tracker <https://bugs.python.org/issue44962> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44962] asyncio.create_task weakrefset race condition
Change by Thomas Grainger : -- versions: +Python 3.10 ___ Python tracker <https://bugs.python.org/issue44962> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44962] asyncio.create_task weakrefset race condition
Thomas Grainger added the comment: still happens on 3.10 even though there's an `with _IterationGuard` ``` worked 0 Traceback (most recent call last): File "/home/graingert/projects/asyncio-demo/demo.py", line 36, in sys.exit(main()) File "/home/graingert/projects/asyncio-demo/demo.py", line 30, in main test_all_tasks_threading() File "/home/graingert/projects/asyncio-demo/demo.py", line 24, in test_all_tasks_threading results.append(f.result()) File "/usr/lib/python3.10/concurrent/futures/_base.py", line 438, in result return self.__get_result() File "/usr/lib/python3.10/concurrent/futures/_base.py", line 390, in __get_result raise self._exception File "/usr/lib/python3.10/concurrent/futures/thread.py", line 52, in run result = self.fn(*self.args, **self.kwargs) File "/usr/lib/python3.10/asyncio/runners.py", line 47, in run _cancel_all_tasks(loop) File "/usr/lib/python3.10/asyncio/runners.py", line 56, in _cancel_all_tasks to_cancel = tasks.all_tasks(loop) File "/usr/lib/python3.10/asyncio/tasks.py", line 53, in all_tasks tasks = list(_all_tasks) File "/usr/lib/python3.10/_weakrefset.py", line 60, in __iter__ with _IterationGuard(self): File "/usr/lib/python3.10/_weakrefset.py", line 33, in __exit__ w._commit_removals() File "/usr/lib/python3.10/_weakrefset.py", line 57, in _commit_removals discard(l.pop()) IndexError: pop from empty list ``` -- ___ Python tracker <https://bugs.python.org/issue44962> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44962] asyncio.create_task weakrefset race condition
Thomas Grainger added the comment: interestingly 3.10 didn't show: sys:1: RuntimeWarning: coroutine 'BaseEventLoop.shutdown_asyncgens' was never awaited -- ___ Python tracker <https://bugs.python.org/issue44962> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44963] anext_awaitable is not a collections.abc.Generator
Thomas Grainger added the comment: it also fails with asyncio.create_task ``` import asyncio async def agen(): yield async def main(): p = agen() await asyncio.create_task(anext(p, 'finished')) asyncio.run(main()) ``` ``` Traceback (most recent call last): File "/home/graingert/projects/datapraxis/analysis/foo.py", line 10, in asyncio.run(main()) File "/usr/lib/python3.10/asyncio/runners.py", line 44, in run return loop.run_until_complete(main) File "/usr/lib/python3.10/asyncio/base_events.py", line 641, in run_until_complete return future.result() File "/home/graingert/projects/asyncio-demo/foo.py", line 8, in main await asyncio.create_task(anext(p, 'finished')) File "/usr/lib/python3.10/asyncio/tasks.py", line 337, in create_task task = loop.create_task(coro) File "/usr/lib/python3.10/asyncio/base_events.py", line 433, in create_task task = tasks.Task(coro, loop=self, name=name) TypeError: a coroutine was expected, got ``` there's also a problem with cancelling and aclosing an async gen this way: ``` import asyncio import contextlib async def agen(): await asyncio.sleep(1) yield async def main(): async with contextlib.aclosing(agen()) as p: asyncio.current_task().cancel() try: await anext(p, 'finished') except asyncio.CancelledError: pass asyncio.run(main()) ``` ``` an error occurred during closing of asynchronous generator asyncgen: Traceback (most recent call last): File "/usr/lib/python3.10/asyncio/runners.py", line 44, in run return loop.run_until_complete(main) File "/usr/lib/python3.10/asyncio/base_events.py", line 641, in run_until_complete return future.result() File "/home/graingert/projects/asyncio-demo/foo.py", line 9, in main async with contextlib.aclosing(agen()) as p: File "/usr/lib/python3.10/contextlib.py", line 366, in __aexit__ await self.thing.aclose() RuntimeError: aclose(): asynchronous generator is already running During handling of the above exception, another exception occurred: RuntimeError: aclose(): asynchronous generator is already running Traceback (most recent call last): File "/home/graingert/projects/datapraxis/analysis/foo.py", line 16, in asyncio.run(main()) File "/usr/lib/python3.10/asyncio/runners.py", line 44, in run return loop.run_until_complete(main) File "/usr/lib/python3.10/asyncio/base_events.py", line 641, in run_until_complete return future.result() File "/home/graingert/projects/asyncio-demo/foo.py", line 9, in main async with contextlib.aclosing(agen()) as p: File "/usr/lib/python3.10/contextlib.py", line 366, in __aexit__ await self.thing.aclose() RuntimeError: aclose(): asynchronous generator is already running ``` -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue44963> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44963] anext_awaitable is not a collections.abc.Generator
Change by Thomas Grainger : -- nosy: +pablogsal ___ Python tracker <https://bugs.python.org/issue44963> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44962] asyncio.create_task weakrefset race condition
Change by Thomas Grainger : -- keywords: +patch pull_requests: +26365 stage: -> patch review pull_request: https://github.com/python/cpython/pull/27909 ___ Python tracker <https://bugs.python.org/issue44962> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44962] asyncio.create_task weakrefset race condition
Change by Thomas Grainger : -- pull_requests: +26373 pull_request: https://github.com/python/cpython/pull/27921 ___ Python tracker <https://bugs.python.org/issue44962> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44962] asyncio.create_task weakrefset race condition
Thomas Grainger added the comment:
> weakref.WeakSet is not thread-safe, which means concurrent create_task's in
> different threads (even on separate event loops) is not safe.
actually it looks like WeakSet is *supposed* to be thread-safe
```
import patchy
patchy.patch(
"weakref:WeakSet._commit_removals",
"""\
@@ -1,5 +1,10 @@
def _commit_removals(self):
-l = self._pending_removals
+pop = self._pending_removals.pop
discard = self.data.discard
-while l:
-discard(l.pop())
+while True:
+try:
+item = pop()
+except IndexError:
+return
+else:
+discard(item)
"""
)
import itertools
import asyncio
import concurrent.futures
import sys
import threading
threads = 200
def test_all_tasks_threading() -> None:
async def foo() -> None:
await asyncio.sleep(0)
async def create_tasks() -> None:
for i in range(1000):
asyncio.create_task(foo())
await asyncio.sleep(0)
results = []
with concurrent.futures.ThreadPoolExecutor(threads) as tpe:
for f in concurrent.futures.as_completed(
tpe.submit(asyncio.run, create_tasks()) for i in range(threads)
):
results.append(f.result())
assert results == [None] * threads
def main():
for i in itertools.count():
test_all_tasks_threading()
print(f"worked {i}")
return 0
if __name__ == "__main__":
sys.exit(main())
```
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[issue44962] asyncio.create_task weakrefset race condition
Change by Thomas Grainger : -- nosy: +pitrou ___ Python tracker <https://bugs.python.org/issue44962> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45276] avoid try 1000 in asyncio all_tasks by making weak collection .copy() atomic
New submission from Thomas Grainger : the weak collections should have the same threadsafe/thread unsafe guarantees as their strong reference counterparts - eg dict.copy and set.copy are atomic and so the weak versions should be atomic also -- components: Interpreter Core, asyncio messages: 402544 nosy: asvetlov, graingert, yselivanov priority: normal severity: normal status: open title: avoid try 1000 in asyncio all_tasks by making weak collection .copy() atomic versions: Python 3.10, Python 3.11, Python 3.9 ___ Python tracker <https://bugs.python.org/issue45276> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45276] avoid try 1000 in asyncio all_tasks by making weak collection .copy() atomic
Change by Thomas Grainger : -- keywords: +patch pull_requests: +26925 stage: -> patch review pull_request: https://github.com/python/cpython/pull/28541 ___ Python tracker <https://bugs.python.org/issue45276> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45278] RuntimeError on race on weakset concurrent iteration
Change by Thomas Grainger : -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue45278> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45279] avoid redundant _commit_removals pending_removals guard
New submission from Thomas Grainger : refactor to avoid redundant _commit_removals pending_removals guard -- components: Library (Lib) messages: 402554 nosy: graingert priority: normal severity: normal status: open title: avoid redundant _commit_removals pending_removals guard versions: Python 3.10, Python 3.11, Python 3.9 ___ Python tracker <https://bugs.python.org/issue45279> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45279] avoid redundant _commit_removals pending_removals guard
Change by Thomas Grainger : -- keywords: +patch pull_requests: +26930 stage: -> patch review pull_request: https://github.com/python/cpython/pull/28546 ___ Python tracker <https://bugs.python.org/issue45279> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45390] asyncio.Task doesn't propagate CancelledError() exception correctly.
Thomas Grainger added the comment: afaik this is intentional https://bugs.python.org/issue31033 -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue45390> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45435] delete misleading faq entry about atomic operations
Change by Thomas Grainger : -- assignee: docs@python components: Documentation nosy: docs@python, graingert priority: normal severity: normal status: open title: delete misleading faq entry about atomic operations ___ Python tracker <https://bugs.python.org/issue45435> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45435] delete misleading faq entry about atomic operations
Change by Thomas Grainger : -- keywords: +patch pull_requests: +27181 stage: -> patch review pull_request: https://github.com/python/cpython/pull/28886 ___ Python tracker <https://bugs.python.org/issue45435> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45435] delete misleading faq entry about atomic operations
Thomas Grainger added the comment: it's as part of this discussion in https://mail.python.org/archives/list/python-...@python.org/thread/ABR2L6BENNA6UPSPKV474HCS4LWT26GY/#IAOCDDCJ653NBED3G2J2YBWD7HHPFHT6 and others in #python-dev specifically https://github.com/python/cpython/blob/2f92e2a590f0e5d2d3093549f5af9a4a1889eb5a/Objects/dictobject.c#L2582-L2586 regarding if any of the items are builtins or not: the faq entry lists (L, L1, L2 are lists, D, D1, D2 are dicts, x, y are objects, i, j are ints) so I read that to mean x and y are user defined objects with user defined comparison and equality methods -- ___ Python tracker <https://bugs.python.org/issue45435> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue25625] "chdir" Contex manager for pathlib
Change by Thomas Grainger : -- nosy: +graingert nosy_count: 10.0 -> 11.0 pull_requests: +27360 pull_request: https://github.com/python/cpython/pull/29091 ___ Python tracker <https://bugs.python.org/issue25625> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45996] Worse error from asynccontextmanager in Python 3.10
Thomas Grainger added the comment: I think `AttributeError: args` is the desired/expected behaviour consider the sync version: ``` import logging from asyncio import sleep, gather, run from contextlib import asynccontextmanager, contextmanager @contextmanager def foo(): yield def test(): f = foo() f.__enter__() f.__enter__() test() ``` ``` Traceback (most recent call last): File "/home/graingert/projects/example/sync.py", line 15, in test() File "/home/graingert/projects/example/sync.py", line 13, in test f.__enter__() File "/usr/lib/python3.9/contextlib.py", line 117, in __enter__ del self.args, self.kwds, self.func AttributeError: args ``` -- ___ Python tracker <https://bugs.python.org/issue45996> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45996] Worse error from asynccontextmanager in Python 3.10
Thomas Grainger added the comment: or consider the trio version: ``` import logging import trio from contextlib import asynccontextmanager @asynccontextmanager async def foo(): await trio.sleep(1) yield async def test(): async with trio.open_nursery() as n: f = foo() n.start_soon(f.__aenter__) n.start_soon(f.__aenter__) trio.run(test) ``` ``` Traceback (most recent call last): File "/home/graingert/projects/examples/bar.py", line 17, in trio.run(test) File "/home/graingert/.virtualenvs/testing39/lib/python3.9/site-packages/trio/_core/_run.py", line 1932, in run raise runner.main_task_outcome.error File "/home/graingert/projects/examples/bar.py", line 15, in test n.start_soon(f.__aenter__) File "/home/graingert/.virtualenvs/testing39/lib/python3.9/site-packages/trio/_core/_run.py", line 815, in __aexit__ raise combined_error_from_nursery File "/usr/lib/python3.9/contextlib.py", line 179, in __aenter__ del self.args, self.kwds, self.func AttributeError: args ``` -- ___ Python tracker <https://bugs.python.org/issue45996> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45996] Worse error from asynccontextmanager in Python 3.10
Thomas Grainger added the comment: ah I can repeat this on python3.8.10 trio but not python3.9.9 trio: ``` import logging import trio from contextlib import asynccontextmanager @asynccontextmanager async def foo(): await trio.sleep(1) yield async def test(): async with trio.open_nursery() as n: f = foo() n.start_soon(f.__aenter__) n.start_soon(f.__aenter__) trio.run(test) ``` ``` Traceback (most recent call last): File "bar.py", line 17, in trio.run(test) File "/home/graingert/.virtualenvs/osirium-main/lib/python3.8/site-packages/trio/_core/_run.py", line 1932, in run raise runner.main_task_outcome.error File "bar.py", line 15, in test n.start_soon(f.__aenter__) File "/home/graingert/.virtualenvs/osirium-main/lib/python3.8/site-packages/trio/_core/_run.py", line 815, in __aexit__ raise combined_error_from_nursery File "/usr/lib/python3.8/contextlib.py", line 171, in __aenter__ return await self.gen.__anext__() RuntimeError: anext(): asynchronous generator is already running ``` -- ___ Python tracker <https://bugs.python.org/issue45996> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45996] Worse error from asynccontextmanager in Python 3.10
Thomas Grainger added the comment: I see the change here: https://github.com/python/cpython/commit/1c5c9c89ffc36875afaf4c3cc6a716d4bd089bbf#diff-e00601a380ba6c916ba4333277fe6ea43d2477804002ab1ae64480f80fec8e3aR177-R179 this is intentionally implementing https://bugs.python.org/issue30306 for asynccontextmanagers that was initially missing -- ___ Python tracker <https://bugs.python.org/issue45996> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45996] Worse error from asynccontextmanager in Python 3.10
Thomas Grainger added the comment:
you can see the analogous sync contextmanager issue on python3.6 with:
```
import logging
from contextlib import contextmanager
@contextmanager
def foo():
yield
def test():
f = foo()
f.__enter__()
f.__enter__()
test()
```
on python3.7+ you get the bpo-30306 behaviour
```
Traceback (most recent call last):
File "sync.py", line 14, in
test()
File "sync.py", line 12, in test
f.__enter__()
File "/usr/lib/python3.8/contextlib.py", line 111, in __enter__
del self.args, self.kwds, self.func
AttributeError: args
```
and python3.6 you get the same sort of error you see now for
asynccontextmanagers:
```
Traceback (most recent call last):
File "sync.py", line 14, in
test()
File "sync.py", line 12, in test
f.__enter__()
File "/usr/lib/python3.6/contextlib.py", line 83, in __enter__
raise RuntimeError("generator didn't yield") from None
RuntimeError: generator didn't yield
```
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[issue39277] _PyTime_FromDouble() fails to detect an integer overflow when converting a C double to a C int64_t
New submission from Thomas Grainger : _PyTime_FromDouble() fails to detect an integer overflow when converting a C double to a C int64_t Python 3.7.5 (default, Nov 20 2019, 09:21:52) [GCC 9.2.1 20191008] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import time >>> time.sleep(9223372036.854777) Traceback (most recent call last): File "", line 1, in ValueError: sleep length must be non-negative -- messages: 359682 nosy: graingert, vstinner priority: normal severity: normal status: open title: _PyTime_FromDouble() fails to detect an integer overflow when converting a C double to a C int64_t type: behavior versions: Python 2.7, Python 3.7, Python 3.8 ___ Python tracker <https://bugs.python.org/issue39277> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue39277] _PyTime_FromDouble() fails to detect an integer overflow when converting a C double to a C int64_t
Change by Thomas Grainger : -- versions: -Python 2.7 ___ Python tracker <https://bugs.python.org/issue39277> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue29842] Make Executor.map work with infinite/large inputs correctly
Change by Thomas Grainger : -- keywords: +patch pull_requests: +17948 stage: -> patch review pull_request: https://github.com/python/cpython/pull/18566 ___ Python tracker <https://bugs.python.org/issue29842> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue39931] Global variables are not accessible from child processes (multiprocessing.Pool)
Thomas Grainger added the comment: yeah this is normal. on Python 3.8 mac multiprocessing switched to spawn you have to use https://docs.python.org/3/library/multiprocessing.shared_memory.html to share content between processes or pass it to be pickled in the args of imap_unordered https://bugs.python.org/issue33725 -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue39931> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue40406] MagicMock __aenter__ should be AsyncMock(return_value=MagicMock())
Thomas Grainger added the comment: Perhaps there could be a MagicAsyncMock that supports .__await__ and .__aenter__ etc? -- ___ Python tracker <https://bugs.python.org/issue40406> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue40406] MagicMock __aenter__ should be AsyncMock(return_value=MagicMock())
New submission from Thomas Grainger : aentering a MagicMock() results in an AsyncMock which behaves differently than I expected: ``` python3.9 -m asyncio asyncio REPL 3.9.0a5 (default, Apr 18 2020, 00:00:31) [GCC 9.3.0] on linux Use "await" directly instead of "asyncio.run()". Type "help", "copyright", "credits" or "license" for more information. >>> import asyncio >>> from unittest import mock >>> with mock.MagicMock() as m: ... with m.foo() as u: ... u.hello() ... >>> async with mock.MagicMock() as m: ... async with m.foo() as u: ... u.hello() ... :2: RuntimeWarning: coroutine 'AsyncMockMixin._execute_mock_call' was never awaited RuntimeWarning: Enable tracemalloc to get the object allocation traceback Traceback (most recent call last): File "/usr/lib/python3.9/concurrent/futures/_base.py", line 439, in result return self.__get_result() File "/usr/lib/python3.9/concurrent/futures/_base.py", line 388, in __get_result raise self._exception File "", line 2, in AttributeError: __aenter__ ``` This is annoying for mocking database interfaces like ``` async def update_users(db, user): async with db.connection() as conn: async with conn.transaction() as tx: ... ``` -- components: Tests, asyncio messages: 367419 nosy: asvetlov, graingert, yselivanov priority: normal severity: normal status: open title: MagicMock __aenter__ should be AsyncMock(return_value=MagicMock()) versions: Python 3.8, Python 3.9 ___ Python tracker <https://bugs.python.org/issue40406> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37771] No equivalent of `inspect.getcoroutinestate` for PyAsyncGenASend instances
Change by Thomas Grainger : -- nosy: +alex.gronholm, graingert ___ Python tracker <https://bugs.python.org/issue37771> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue43216] Removal of @asyncio.coroutine in Python 3.10
Change by Thomas Grainger : -- nosy: +graingert ___ Python tracker <https://bugs.python.org/issue43216> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue40720] accessing mmap of file that is overwritten causes bus error
Thomas Grainger added the comment:
I can confirm this happens on py3.5-3.10
```
import mmap
import pathlib
import tempfile
def main():
with tempfile.TemporaryDirectory() as tmp:
tmp_path = pathlib.Path(tmp)
path = tmp_path / "eg"
path.write_bytes(b"Hello, World!")
with path.open("rb") as rf:
mm = mmap.mmap(rf.fileno(), 0, mmap.MAP_SHARED, mmap.PROT_READ)
path.write_bytes(b"")
bytes(mm)
if __name__ == "__main__":
main()
```
--
nosy: +graingert
versions: +Python 3.10, Python 3.6, Python 3.7, Python 3.9
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[issue40697] add fissix as a lib2to3 alternative
New submission from Thomas Grainger : now that lib2to3 is deprecated, the stdlib should point to alternatives currently the docs point to libcst or parso, however neither is a drop-in replacement for lib2to3 the docs should add fissix as a lib2to3 alternative, because it is a drop-in replacement -- components: 2to3 (2.x to 3.x conversion tool) messages: 369438 nosy: graingert priority: normal pull_requests: 19543 severity: normal status: open title: add fissix as a lib2to3 alternative versions: Python 3.10, Python 3.9 ___ Python tracker <https://bugs.python.org/issue40697> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue41576] document BaseException in favour of bare except in error tutorial
Change by Thomas Grainger : -- assignee: docs@python components: Documentation nosy: docs@python, graingert priority: normal pull_requests: 21033 severity: normal status: open title: document BaseException in favour of bare except in error tutorial ___ Python tracker <https://bugs.python.org/issue41576> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue41576] document BaseException in favour of bare except in error tutorial
Thomas Grainger added the comment: it seems odd to document digging around in sys.exc_info() in favour of the more ergonomic syntax to do the same thing -- ___ Python tracker <https://bugs.python.org/issue41576> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
