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gh-81371: implementing checking async generator methods by wrongnull · Pull Request #102129 · python/cpython · GitHub

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gh-81371: implementing checking async generator methods #102129

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gh-81371: implementing checking async generator methods #102129

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a8c7489
implementing checking async generator methods
wrongnull Feb 21, 2023
f309fbd
📜🤖 Added by blurb_it.
blurb-it[bot] Feb 22, 2023
d16fa1a
handle one more corner case
wrongnull Feb 22, 2023
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8 changes: 8 additions & 0 deletions Lib/inspect.py
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Original file line number Diff line number Diff line change
Expand Up @@ -410,12 +410,20 @@ def markcoroutinefunction(func):
func._is_coroutine_marker = _is_coroutine_marker
return func

_agen_methods = ("__anext__", "aclose", "asend", "athrow")

def iscoroutinefunction(obj):
"""Return true if the object is a coroutine function.

Coroutine functions are normally defined with "async def" syntax, but may
be marked via markcoroutinefunction.
"""
#check if obj is async gen method and returns awaitable

sobolevn Feb 22, 2023

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Please, at least add tests for this feature.

wrongnull Feb 22, 2023

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

as soon as I fully understand the original question
obj = functools._unwrap_partial(obj)
is_valid = isbuiltin(obj) or ismethodwrapper(obj)
if is_valid and isasyncgen(obj.__self__) and obj.__name__ in _agen_methods:
return True
#now regular case
return _has_code_flag(obj, CO_COROUTINE) or _has_coroutine_mark(obj)

def isasyncgenfunction(obj):
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2023-02-22-02-14-38.gh-issue-81371.tUo0u1.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
This PR may fix the issue 81371

sobolevn Feb 22, 2023

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

May? Or does it? Please, also specify what the issue is. These are user-facing notes. It must be clear without a github link.

wrongnull Feb 22, 2023

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May? Or does it? Please, also specify what the issue is. These are user-facing notes. It must be clear without a github link.

I'm not 100% sure if it does. In the original issue those methods just returns some awaitable objects that doesn't pass the check. And I fixed it, but only for this certain example (I will add the tests soon). The obstacle is that I don't know if there are similar functions somewhere in the inerpreter. I'm not an internals expert. It would be great if you or someone else could suggest me such places.
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