Example: https://docs.python.org/3.4/library/asyncio-task.html
TimeoutError is mentioned several times, and links to the OSError subclass. However, the actual TimeoutError raised by asyncio stuff is the one from concurrent.futures, which is not compatible. The docs as they are seem to suggest that something like "except TimeoutError" would be appropriate, when in fact that would not produce the expected behavior; "except asyncio.TimeoutError" is what you'd want.