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_AS_COMPLETED�PENDING�RUNNING� CANCELLED�CANCELLED_AND_NOTIFIED�FINISHED�pending�running� cancelled�finishedzconcurrent.futuresc @ s e Zd ZdZdS )�Errorz-Base class for all future-related exceptions.N��__name__�
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r r r r r! r6 r& r' r( r0 r r r- r r2 p s r2 c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) �_AcquireFutureszDA context manager that does an ordered acquire of Future conditions.c C s t |td�| _d S )N)�key)�sorted�id�futures)r r; r r r r! � s z_AcquireFutures.__init__c C s | j D ]}|j�� qd S r )r; �
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Iterate on the list *fs*, yielding finished futures one by one in
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|� W 5 Q R X �qX dS )an An iterator over the given futures that yields each as it completes.
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Nc s s | ]}|j ttfkr|V qd S r rB rD r r r rG � s �z as_completed.<locals>.<genexpr>)rR r z %d (of %d) futures unfinished)�time� monotonicr/ �lenr7 rN r �listr< rJ rP rS r r �waitr, r �clear�reverse) rK �timeout�end_timeZ
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|j� t|t| �| �S )a Wait for the futures in the given sequence to complete.
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return_when: Indicates when this function should return. The options
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FIRST_COMPLETED - Return when any future finishes or is
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Returns:
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This method should be called by Executor implementations before
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