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_AS_COMPLETEDPENDINGRUNNING CANCELLEDCANCELLED_AND_NOTIFIEDFINISHEDpendingrunning cancelledfinishedzconcurrent.futuresc @ s e Z d Z d Z d S)Errorz-Base class for all future-related exceptions.N)__name__
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S) _Waiterz;Provides the event that wait() and as_completed() block on.c C s t j | _ g | _ d S)N) threadingZEventeventfinished_futures)selfr r r __init__: s z_Waiter.__init__c C s | j j | d S)N)r append)r futurer r r
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| j j | Wd QXqLWXd S)an An iterator over the given futures that yields each as it completes.
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An iterator that yields the given Futures as they complete (finished or
cancelled). If any given Futures are duplicated, they will be returned
once.
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before the given timeout.
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| j t | t | | S)a Wait for the futures in the given sequence to complete.
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fs: The sequence of Futures (possibly created by different Executors) to
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return_when: Indicates when this function should return. The options
are:
FIRST_COMPLETED - Return when any future finishes or is
cancelled.
FIRST_EXCEPTION - Return when any future finishes by raising an
exception. If no future raises an exception
then it is equivalent to ALL_COMPLETED.
ALL_COMPLETED - Return when all futures finish or are cancelled.
Returns:
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futures that completed (is finished or cancelled) before the wait
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futures.
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Args:
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argument when the future completes or is cancelled. The callable
will always be called by a thread in the same process in which
it was added. If the future has already completed or been
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C s | j | j t t g k r+ t n | j t k rD | j S| j j | | j t t g k ru t n" | j t k r | j St Wd QXd S)aB Return the result of the call that the future represents.
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CancelledError: If the future was cancelled.
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Future.resultc
C s | j | j t t g k r+ t n | j t k rA | j S| j j | | j t t g k rr t n | j t k r | j St Wd QXd S)aU Return the exception raised by the call that the future represents.
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future isn't done. If None, then there is no limit on the wait
time.
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timeout.
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zFuture.exceptionc C s | j | j t k rG t | _ x | j D] } | j | q, Wd S| j t k rc t | _ d St j d t
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(future calls to running() will return True) and True is returned.
This method should be called by Executor implementations before
executing the work associated with this future. If this method returns
False then the work should not be executed.
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or set_exception() was called.
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N)NotImplementedError)r r_ r8 kwargsr r r submit s zExecutor.submitrJ Nc s` d k r t j n f d d t | D f d d } | S)a~ Returns an iterator equivalent to map(fn, iter).
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executor have been reclaimed.
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