python

Protocol with attributes can't use issubclass

TypeError: Protocols with non-method members don't support issubclass

Fixes

1.Only use isinstance() for runtime_checkable Protocols with non-method members
2.Remove @runtime_checkable if structural checking isn't needed at runtime
3.Move attributes to abstract properties in a regular ABC instead

pythontypingprotocol

Related Errors

Asyncio event loop already running

RuntimeError: This event loop is already running

•Use nest_asyncio.apply() to allow nested event loops
•Use asyncio.run_coroutine_threadsafe() instead of asyncio.run()

Coroutine never awaited

RuntimeWarning: coroutine '.*' was never awaited

•Add 'await' before the coroutine call
•Use asyncio.create_task() to schedule the coroutine

Asyncio task was cancelled

asyncio\.CancelledError

•Handle CancelledError in try/except within the task
•Use asyncio.shield() to protect critical sections from cancellation