网络编程之多线程——线程queue

网络编程之多线程——线程queue

线程queue

queue is especially useful in threaded programming when information must be exchanged safely between multiple threads.

有三种不同的用法。

1、class queue.Queue(maxsize=0) # 队列：先进先出

import queue
q=queue.Queue()
q.put('first')
q.put('second')
q.put('third')
print(q.get())
print(q.get())
print(q.get())
'''
结果(先进先出):
first
second
third
'''

2、class queue.LifoQueue(maxsize=0) # 堆栈：last in first out

import queue
q=queue.LifoQueue()
q.put('first')
q.put('second')
q.put('third')
print(q.get())
print(q.get())
print(q.get())
'''
结果(后进先出):
third
second
first
'''

3、class queue.PriorityQueue(maxsize=0) # 优先级队列：存储数据时可这设置优先级队列

port queue
q=queue.PriorityQueue()
#put进入一个元组,元组的第一个元素是优先级(通常是数字,也可以是非数字之间的比较),数字越小优先级越高
q.put((20,'a'))
q.put((10,'b'))
q.put((30,'c'))
print(q.get())
print(q.get())
print(q.get())
'''
结果(数字越小优先级越高,优先级高的优先出队):
(10, 'b')
(20, 'a')
(30, 'c')
'''