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Python: Essential Reference, Third Edition by David Beazley

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Queue

The Queue module implements a multiproducer, multiconsumer FIFO queue that can be used to safely exchange information between multiple threads of execution. It’s available only if thread support has been enabled.

The Queue module defines the following class:

						Queue(maxsize)

Creates a new queue in which maxsize is the maximum number of items that can be placed in the queue. If maxsize is less than or equal to zero, the queue size is infinite.

A Queue object, q, has the following methods:

						q.qsize()

Returns the approximate size of the queue. Because other threads may be updating the queue, this number is not entirely reliable.

						q.empty()

Returns True if the queue is empty and returns False otherwise.

						q.full()

Returns True if the queue is ...

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