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� Z d � Z d � Z RS( sj Create a queue object with a given maximum size.
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c C ss | j j � zQ | j d } | d k rT | d k rD t d � � n | j j � n | | _ Wd | j j � Xd S( s. Indicate that a formerly enqueued task is complete.
Used by Queue consumer threads. For each get() used to fetch a task,
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on the task is complete.
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have been processed (meaning that a task_done() call was received
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If optional args 'block' is true and 'timeout' is None (the default),
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the Full exception if no free slot was available within that time.
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is immediately available, else raise the Full exception ('timeout'
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� | SWd | j j � Xd S( s Remove and return an item from the queue.
If optional args 'block' is true and 'timeout' is None (the default),
block if necessary until an item is available. If 'timeout' is
a non-negative number, it blocks at most 'timeout' seconds and raises
the Empty exception if no item was available within that time.
Otherwise ('block' is false), return an item if one is immediately
available, else raise the Empty exception ('timeout' is ignored
in that case).
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RS( s� Variant of Queue that retrieves open entries in priority order (lowest first).
Entries are typically tuples of the form: (priority number, data).
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