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GH-93896: always set event loop in asyncio.run and IsolatedAsyncioTestCase #94593

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Merged
pablogsal merged 5 commits into from
Jul 6, 2022
+19 −0
Merged

GH-93896: always set event loop in asyncio.run and IsolatedAsyncioTestCase #94593

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a67cc6f
always set event loop
kumaraditya303 Jul 6, 2022
9576a91
📜🤖 Added by blurb_it.
blurb-it[bot] Jul 6, 2022
f3c1caf
wip
kumaraditya303 Jul 6, 2022
d01fd01
add a test
kumaraditya303 Jul 6, 2022
16be2ec
fix import
kumaraditya303 Jul 6, 2022
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8 changes: 6 additions & 2 deletions Lib/asyncio/runners.py
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Original file line number Diff line number Diff line change
Expand Up @@ -176,8 +176,12 @@ async def main():
raise RuntimeError(
"asyncio.run() cannot be called from a running event loop")

with Runner(debug=debug) as runner:
return runner.run(main)
try:
with Runner(debug=debug) as runner:
events.set_event_loop(runner.get_loop())
return runner.run(main)
finally:
events.set_event_loop(None)
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def _cancel_all_tasks(loop):
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1 change: 1 addition & 0 deletions Lib/unittest/async_case.py
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Expand Up @@ -115,6 +115,7 @@ def _callMaybeAsync(self, func, /, *args, **kwargs):
def _setupAsyncioRunner(self):
assert self._asyncioRunner is None, 'asyncio runner is already initialized'
runner = asyncio.Runner(debug=True)
asyncio.set_event_loop(runner.get_loop())
self._asyncioRunner = runner

def _tearDownAsyncioRunner(self):
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2022-07-06-06-02-02.gh-issue-93896.vIgWGr.rst
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@@ -0,0 +1 @@
Fix :func:`asyncio.run` and :class:`unittest.IsolatedAsyncioTestCase` to always the set event loop as it was done in Python 3.10 and earlier. Patch by Kumar Aditya.