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authorKumar Aditya <59607654+kumaraditya303@users.noreply.github.com>2023-03-16 14:58:10 (GMT)
committerGitHub <noreply@github.com>2023-03-16 14:58:10 (GMT)
commitadaed17341e649fabb0f522e9b4f5962fcdf1d48 (patch)
treee272950f38c6ab240568898c91e61e7f9478a461
parentfbe82fdd777cead5d6e08ac0d1da19738c19bd81 (diff)
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GH-102748: remove legacy support for generator based coroutines from `asyncio.iscoroutine` (#102749)
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
-rw-r--r--Doc/whatsnew/3.12.rst4
-rw-r--r--Lib/asyncio/coroutines.py3
-rw-r--r--Lib/test/test_asyncio/test_pep492.py6
-rw-r--r--Misc/NEWS.d/next/Library/2023-03-16-08-17-29.gh-issue-102748.WNACpI.rst3
4 files changed, 14 insertions, 2 deletions
diff --git a/Doc/whatsnew/3.12.rst b/Doc/whatsnew/3.12.rst
index 217ffec..b9c6685 100644
--- a/Doc/whatsnew/3.12.rst
+++ b/Doc/whatsnew/3.12.rst
@@ -237,6 +237,10 @@ asyncio
* Add C implementation of :func:`asyncio.current_task` for 4x-6x speedup.
(Contributed by Itamar Ostricher and Pranav Thulasiram Bhat in :gh:`100344`.)
+* :func:`asyncio.iscoroutine` now returns ``False`` for generators as
+ :mod:`asyncio` does not support legacy generator-based coroutines.
+ (Contributed by Kumar Aditya in :gh:`102748`.)
+
inspect
-------
diff --git a/Lib/asyncio/coroutines.py b/Lib/asyncio/coroutines.py
index 7fda0e4..ab4f30e 100644
--- a/Lib/asyncio/coroutines.py
+++ b/Lib/asyncio/coroutines.py
@@ -25,8 +25,7 @@ def iscoroutinefunction(func):
# Prioritize native coroutine check to speed-up
# asyncio.iscoroutine.
-_COROUTINE_TYPES = (types.CoroutineType, types.GeneratorType,
- collections.abc.Coroutine)
+_COROUTINE_TYPES = (types.CoroutineType, collections.abc.Coroutine)
_iscoroutine_typecache = set()
diff --git a/Lib/test/test_asyncio/test_pep492.py b/Lib/test/test_asyncio/test_pep492.py
index f833f78..dc25a46 100644
--- a/Lib/test/test_asyncio/test_pep492.py
+++ b/Lib/test/test_asyncio/test_pep492.py
@@ -119,6 +119,12 @@ class CoroutineTests(BaseTest):
self.assertTrue(asyncio.iscoroutine(FakeCoro()))
+ def test_iscoroutine_generator(self):
+ def foo(): yield
+
+ self.assertFalse(asyncio.iscoroutine(foo()))
+
+
def test_iscoroutinefunction(self):
async def foo(): pass
self.assertTrue(asyncio.iscoroutinefunction(foo))
diff --git a/Misc/NEWS.d/next/Library/2023-03-16-08-17-29.gh-issue-102748.WNACpI.rst b/Misc/NEWS.d/next/Library/2023-03-16-08-17-29.gh-issue-102748.WNACpI.rst
new file mode 100644
index 0000000..b1dc67f
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-03-16-08-17-29.gh-issue-102748.WNACpI.rst
@@ -0,0 +1,3 @@
+:func:`asyncio.iscoroutine` now returns ``False`` for generators as
+:mod:`asyncio` does not support legacy generator-based coroutines.
+Patch by Kumar Aditya.