asyncio has wait_for coroutine for timeouts.
It works like:
async def coro():
# do long running task
await asyncio.sleep(10000)
await asyncio.wait_for(coro(), 1.5)
The approach requires splitting code into two functions: one for waiting
and other for performing the task.
aiohttp has Timeout class
(https://github.com/KeepSafe/aiohttp/blob/master/aiohttp/helpers.py#L451-L488).
The code from example may be rewritten as:
with Timeout(1.5):
# do long running task
await asyncio.sleep(10000)
It raises asyncio.TimeoutError and cancels inner code if timeout runs out.
I believe the Timeout context manager worth to be included into asyncio
itself.
It is a regular context manager (no __aenter__/__aexit__ required) and
works even with Python 3.3
I'll be happy to make a Pull Request after getting general agreement.
