Python 模拟登陆系统

 1 # Way 1:
 2 user = "Andy"
 3 passwd = "123456"
 4 
 5 for i in range(3):
 6     username = input("Username: ")
 7     password = input("Password: ")
 8 
 9     if username == user and password == passwd:
10         print("Welcome %s Login..." % user)
11         break
12     else:
13         print("Invalid Username or Password ! ")
14 
15 else:
16     print("You have the max try..., please contact your system admin for help")
17 
18 
19 # Way 2:
20 user = "Andy"
21 passwd = "123456"
22 Auth_Pass = False
23 
24 for i in range(3):
25     username = input("Username: ")
26     password = input("Password: ")
27 
28     if username == user and password == passwd:
29         print("Welcome %s Login..." % user)
30         Auth_Pass = True
31         break
32     else:
33         print("Invalid Username or Password ! ")
34 
35 if not Auth_Pass:
36     print("You have the max try..., please contact your system admin for help")