day1 python判断输入的密码是否正确

 _username = 'leon'
 _password = 'zyl'
 username = input("username:")
 password = input("password:")
 if  _username == username and  _password == password:
     print("welcome user {name} login ... ".format(name=username))
 else:
     print("Invalid  username or  password!")

打印结果：

当输入正确的用户名密码时：

 C:\Python36\python.exe H:/leon/day1/input.py
 username:leon
 password:zyl
 welcome user leon login ... 

 Process finished with exit code 0

当输入错误的用户名密码时：

 C:\Python36\python.exe H:/leon/day1/input.py
 username:ll
 password:tt
 Invalid  username or  password!

 Process finished with exit code 0