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Close new event loops in just_run helper #159

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Close new event loops in just_run helper #159

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8a12ea9
Close new event loops in just_run helper
takluyver Sep 13, 2021
8b6ea2d
Use temporary event loop when one is not already running in just_run
takluyver Sep 13, 2021
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16 changes: 7 additions & 9 deletions nbclient/util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,23 +38,21 @@ def just_run(coro: Awaitable) -> Any:
# original from vaex/asyncio.py
loop = asyncio._get_running_loop()
if loop is None:
had_running_loop = False
# Create a temporary event loop
loop = asyncio.new_event_loop()
try:
loop = asyncio.get_event_loop()
except RuntimeError:
# we can still get 'There is no current event loop in ...'
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
return loop.run_until_complete(coro)
finally:
loop.close()

else:
had_running_loop = True
if had_running_loop:
# if there is a running loop, we patch using nest_asyncio
# to have reentrant event loops
check_ipython()
import nest_asyncio
nest_asyncio.apply()
check_patch_tornado()
return loop.run_until_complete(coro)
return loop.run_until_complete(coro)


def run_sync(coro: Callable) -> Callable:
Expand Down