Python实现队列的方法_Python

本文实例讲述了Python实现队列的方法。分享给大家供大家参考。具体实现方法如下：

									#!/usr/bin/env python 

									queue = [] 

									def enQ(): 

									  queue.append(raw_input('Enter new string: ').strip())

									#调用list的列表的pop()函数.pop(0)为列表的第一个元素 

									def deQ(): 

									  if len(queue) == 0: 

									    print 'Cannot pop from an empty queue!'

									  else: 

									    print 'Removed [', queue.pop(0) ,']'

									def viewQ(): 

									  print queue 

									CMDs = {'e': enQ, 'd': deQ, 'v': viewQ} 

									def showmenu(): 

									  pr = """ 

									  (E)nqueue 

									  (D)equeue 

									  (V)iew 

									  (Q)uit 

									    Enter choice: """

									  while True: 

									    while True: 

									      try: 

									        choice = raw_input(pr).strip()[0].lower() 

									      except (EOFError, KeyboardInterrupt, IndexError):

									        choice = 'q'

									      print '\nYou picked: [%s]' % choice 

									      if choice not in 'devq': 

									        print 'Invalid option, try again'

									      else: 

									        break

									    if choice == 'q': 

									      break

									    CMDs[choice]() 

									if __name__ == '__main__': 

									  showmenu()

希望本文所述对大家的Python程序设计有所帮助。

Python实现队列的方法

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