Viktor Kovtun added the comment:
asyncio.wait_for is coroutine itself, to start executing code, no matter with
this PR or not it needs to be awaited/yield from
import asyncio
@asyncio.coroutine
def foo():
print(1)
loop = asyncio.get_event_loop()
fut = asyncio.wait_for(foo(), 0)
print('it is not raised yet')
try:
loop.run_until_complete(fut)
except asyncio.TimeoutError:
print('raised here')
will print
it is not raised yet
raised here
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<https://bugs.python.org/issue31556>
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