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} q W| S)a Return the list of stack frames for this task's coroutine.
If the coroutine is not done, this returns the stack where it is
suspended. If the coroutine has completed successfully or was
cancelled, this returns an empty list. If the coroutine was
terminated by an exception, this returns the list of traceback
frames.
The frames are always ordered from oldest to newest.
The optional limit gives the maximum number of frames to
return; by default all available frames are returned. Its
meaning differs depending on whether a stack or a traceback is
returned: the newest frames of a stack are returned, but the
oldest frames of a traceback are returned. (This matches the
behavior of the traceback module.)
For reasons beyond our control, only one stack frame is
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This produces output similar to that of the traceback module,
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zTask.print_stackc C sH d | _ | j r d S| j d k r; | j j r; d Sd | _ d S)a Request that this task cancel itself.
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the request using try/except/finally.
Unlike Future.cancel, this does not guarantee that the
task will be cancelled: the exception might be caught and
acted upon, delaying cancellation of the task or preventing
cancellation completely. The task may also return a value or
raise a different exception.
Immediately after this method is called, Task.cancelled() will
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r | j S| j | | j t j Wd | j Xd S)a Wait for the single Future or coroutine to complete, with timeout.
Coroutine will be wrapped in Task.
Returns result of the Future or coroutine. When a timeout occurs,
it cancels the task and raises TimeoutError. To avoid the task
cancellation, wrap it in shield().
If the wait is cancelled, the task is also cancelled.
This function is a coroutine.
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| q W| | f S)zeInternal helper for wait() and wait_for().
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q W r#| d k r# j | | x" t t D] } | Vq6Wd S)am Return an iterator whose values are coroutines.
When waiting for the yielded coroutines you'll get the results (or
exceptions!) of the original Futures (or coroutines), in the order
in which and as soon as they complete.
This differs from PEP 3148; the proper way to use this is:
for f in as_completed(fs):
result = yield from f # The 'yield from' may raise.
# Use result.
If a timeout is specified, the 'yield from' will raise
TimeoutError when the timeout occurs before all Futures are done.
Note: The futures 'f' are not necessarily members of fs.
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| Ed HSWd | j Xd S)z9Coroutine that completes after a given time (in seconds).r N)r r r r r r Z _set_result_unless_cancelledrd )Zdelayrw r rx hr r r r s
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z;asyncio.async() function is deprecated, use ensure_future()
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c sZ t | d | } | j r" | S| j } | j f d d } | j | S)a= Wait for a future, shielding it from cancellation.
The statement
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res = yield from something()
*except* that if the coroutine containing it is cancelled, the
task running in something() is not cancelled. From the POV of
something(), the cancellation did not happen. But its caller is
still cancelled, so the yield-from expression still raises
CancelledError. Note: If something() is cancelled by other means
this will still cancel shield().
If you want to completely ignore cancellation (not recommended)
you can combine shield() with a try/except clause, as follows:
try:
res = yield from shield(something())
except CancelledError:
res = None
r c s~ j r& | j s" | j d S| j r? j n; | j } | d k rg j | n j | j d S)N)r r rd rl rm rw )innerra )r r r r s
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