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Z&dS )0z0Support for tasks, coroutines and the scheduler.TaskFIRST_COMPLETEDFIRST_EXCEPTION
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_repr_info^ s zTask._repr_info)limitc C s t j| |S )a Return the list of stack frames for this task's coroutine.
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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
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)r Z_task_print_stack)r/ r8 r: r r r print_stackx s zTask.print_stackc C s4 d| _ | j rdS | jdk r*| jj r*dS d| _dS )a Request that this task cancel itself.
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Unlike Future.cancel, this does not guarantee that the
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raise a different exception.
Immediately after this method is called, Task.cancelled() will
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fddt| D } t| || E dH S )a Wait for the Futures and coroutines given by fs to complete.
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r| j S | j | | j t j W d|j X dS )a Wait for the single Future or coroutine to complete, with timeout.
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If the wait is cancelled, the task is also cancelled.
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call_laterrh functoolspartialr rL r r@ remove_done_callbackr= r< rQ TimeoutError)futr[ r rf timeout_handlecbr r r r A s,
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qW r|dk rʈj||x ttD ] }| V qW dS )am Return an iterator whose values are coroutines.
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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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|E dH S |j X dS )z9Coroutine that completes after a given time (in seconds).r N)r r ri r rj r Z _set_result_unless_cancelledr= )ZdelayrQ r rR hr r r r s
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z;asyncio.async() function is deprecated, use ensure_future() )
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a7 Return a future aggregating results from the given coroutines
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results (in the order of the original sequence, not necessarily
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exceptions in the tasks are treated the same as successful
results, and gathered in the result list; otherwise, the first
raised exception will be immediately propagated to the returned
future.
Cancellation: if the outer Future is cancelled, all children (that
have not completed yet) are also cancelled. If any child is
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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
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