```
stack = []
def push_it():
data =input('数据: ').strip()
if data :#非空字符串为真
stack.append(data)
else:
print('\033[31;1m输入为空\033[0m')
def pop_it():
if stack :#列表非空为真
print('从栈中弹出了: \033[34;1m%s\033[0m' % stack.pop())
else:
print('\033[31;1m空栈\033[0m')
def view_it():
print('\033[31;1m%s\033[0m' % stack)
def show_menu():
# try:
#cmds = {'0':push_it(),'1':pop_it(),'2':view_it()} ----把函数的值(返回值None)放到字典里
cmds = {'0':push_it,'1':pop_it,'2':view_it}#这才是调用函数
menu ="""(0)压栈:
(1)出栈:
(2)查询:
(3)退出:
请选择(0/1/2/3):"""
while 1:
choice =input(menu).strip()#去除两端空白
if choicenot in ['0','1','2','3']:
print('\033[031;1m无效的输入,请重试: \033[0m')
continue
if choice =='3':
print('bye-bye')
break
cmds[choice]()
# except:
# print('请按照菜单输入相应数字')
if __name__ =='__main__':
show_menu()
```
