05.if else format

# Author:iwanghang
# getpass 在pycharm中无效，请用cmd运行
import getpass

_username = "iwanghang"
_password = "123123"
username = input("username:")
password = getpass.getpass("password:")
if _username == username and _password == password:
    print("Welcome user {name} login...".format(name=username))
else:
    print("Invalid username or password!")

Debug Output：

(venv) C:\PycharmProjects\20180111\01>python test04.py
username:iwanghang
password:
Welcome user iwanghang login...

(venv) C:\PycharmProjects\20180111\01>python test04.py
username:iwanghang
password:
Invalid username or password!