select: Don't try selecting on a closed event loop#431
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Signed-off-by: Mathias L. Baumann <mathias.baumann@frequenz.com>
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Pull Request Overview
This PR prevents the select operation from running on a closed asyncio event loop by checking the event loop's state and raising an appropriate error.
- Adds a check in the select() function to confirm that the event loop is open before proceeding.
- Raises a SelectError when the event loop is closed, ensuring proper error handling.
| receivers_map: dict[str, Receiver[Any]] = {str(hash(r)): r for r in receivers} | ||
| pending: set[asyncio.Task[bool]] = set() | ||
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| if asyncio.get_event_loop().is_closed(): |
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[nitpick] Consider using 'asyncio.get_running_loop()' instead of 'asyncio.get_event_loop()' for improved clarity and compatibility with newer Python versions where a running loop is expected.
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| if asyncio.get_event_loop().is_closed(): | |
| if asyncio.get_running_loop().is_closed(): |
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Jun 19, 2025
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closing, I don't think it actually helps |
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With this change, we don't try to clean up any tasks (after the eventloop has ended) as we don't even try to create a task and don't enter the
try/finallyblock if there is no event loop at all.