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j � � n � f d d � t | � D� } t | | | � � Dd HS)a� Wait for the Futures and coroutines given by fs to complete.
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for f in as_completed(fs):
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have not completed yet) are also cancelled. If any child is
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c s` t | d | �} | j � r" | S| j } t j d | � � � f d d � } | j | � � S)a= Wait for a future, shielding it from cancellation.
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*except* that if the coroutine containing it is cancelled, the
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this will still cancel shield().
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try:
res = yield from shield(something())
except CancelledError:
res = None
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For example:
>>> with asyncio.timeout(0.001):
... yield from coro()
timeout: timeout value in seconds
loop: asyncio compatible event loop
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