python 列表模拟堆栰

#!/usr/bin/env python
stack = []


def pushit():
    stack.append(raw_input(‘Enter New string:‘).strip())


def popit():
    if len(stack) == 0:
        print "Cannot pop from an empty stack!"
    else:
        r=stack.pop()
        print "Removed [ %s]" %r

def viewstatck():
    print stack

CMDs = {‘u‘:pushit,‘o‘:popit,‘v‘:viewstatck}

def showmenu():
    pr="""
    p(U)sh
    P(O)p
    (V)iew
    (Q)uit
    Enter choice:"""

    while True:
        choice = raw_input(pr).strip()[0].lower()
        print "\nYou picked:[%s]"%choice
        if choice == ‘q‘:
            break
        if choice not in ‘uovq‘:
            print ‘Invalid option,tyr again‘
            continue
        else:
            CMDs[choice]()

if __name__ == ‘__main__‘:
    showmenu()

本文出自 “服务器” 博客，请务必保留此出处http://zhangfang2012.blog.51cto.com/6380212/1674853

python 列表模拟堆栰

原文：http://zhangfang2012.blog.51cto.com/6380212/1674853