1 #!/usr/bin/env python
2 # -*- coding:utf-8 -*-
3 #用户登录，三次错误机会
4 """
5 导入getpass，给x赋值为1，while真，循环开始，
6 user的赋值等于用户输入的内容，pwd的赋值等于用户输入的内容并且不可见
7 如果用户输入user的赋值等于"admin"而且用户输入pwd的赋值等于"admin888"
8 打印"login successfully!(登陆成功！)"换行 打印"welcome!:(欢迎:)user",break跳出当前循环
9 否则如果x的赋值等于3，打印"Failure three times!(失败三次！)"break跳出当前循环
10 否则打印"login failure!There are three more chances!(登录失败！有三次机会)"
11 x的赋值每循环一次加1，当循环3次后就满足了x赋值为3，break跳出当前循环！
12 """
13 import getpass
14 x = 1
15 while True:
16 user = raw_input("user:")
17 pwd = getpass.getpass('password:')
18 if user == "admin" and pwd == "admin888":
19 print("login successfully!" + "
" +"welcome!:" + user)
20 break
21 elif x == 3:
22 print("Failure three times!")
23 break
24 else:
25 print("login failure!There are three more chances!")
26 x += 1
