Python3 Queue (one-way queue) detailed description

Create a queue

Import Queueq = queue. Queue ()

Empty (returns True if the queue is empty)

Import Queueq = queue. Queue () print (Q.empty ()) #输出: True

Full (returns True if the queue is filled)

Import Queueq = queue. Queue (1) #指定队列大小q. Put (' a ') print (Q.full ()) #输出: True

Put (put an element into the queue) get (take an element out of a queue) FIFO principle

Import Queueq = queue. Queue () q.put (' A ') q.put (' B ') print (Q.get ()) #输出: A

Get_nowait (immediately remove an element without waiting)

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Put_nowait (immediately put an element, do not wait)

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Join (blocks the calling thread until all tasks in the queue are processed)

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Qsize (returns the number of elements in the queue)

Import Queueq = queue. Queue () q.put (' A ') q.put (' B ') print (Q.qsize ()) #输出: 2

Task_done (after completing a task, send a signal to the queue that the task has completed)

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