以下是核心程式設計中乙個stack的例子：
'''
created on 2012-3-6
@author: administrator
'''#!/usr/bin/env python
stack=
def pu****():
def popit():
if len(stack)==0:
print 'has empty!'
else:
print 'remove [', stack.pop() ,']'
def viewstack():
print stack
cmds =
def showmenu():
pr="""
p(u)sh
p(o)p
(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 'uovq':
print 'invalid option,try again'
else:
break
if choice =='q':
break
cmds[choice]()
if __name__=='__main__':
showmenu()
請切記python程式設計中空格的重要性哦！
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