用戶登陸，用已知的user和passwd登陸，先判斷用戶是否合法，然后輸入密碼，判斷密碼是否正確，如果輸入三次錯誤密碼，則自動跳出。否則輸出用戶error

#!/usr/bin/python
import getpass
#coding=utf-8
user = "root"
passwd = "westos"
username = raw_input("please input the username:")
if username == user:
?? ?password = getpass.getpass("please input the password:")
?? ?if password == passwd:
?? ??? ?print "login success"
?? ?else:
?? ??? ?password = getpass.getpass("please input the password again:")
?? ??? ?if password == passwd:
????? ??? ??? ??? ? print "login success"
??? ??? ?else:
?? ??? ???????? password = getpass.getpass("please input the password third:")
?? ??? ??? ?if password == passwd:
????? ??? ??? ??? ??? ? print "login success"
?? ??? ??? ?else:
?? ??? ??? ???????? print "you have no chance"
else:?? ?
?? ?print "username error"
?

??????

轉載于:https://blog.51cto.com/12454546/1911988

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