Python 练习1

#!/usr/bin/env python

#codingutf-8
count = 0
while count < 3:

   username = raw_input("USERNAME:")

   password = raw_input("PASSWORD:")

   if username == "user" and password == "123":

       print "welcome!!!"

       break

   elif username != "user" and password != "123":

       print "username or password wrong!!!"

   elif username == "user" and password != "123":

       print "password is wrong!!!"

   elif username != "user" and password == "123":

       print "username or password is wrong!!!"

   count +=1

   if count == 3:

       print "go away ang don't back!!!"