python入门：if和else的基本用法

 #!/usr/bin/env python
 # -*- coding:utf-8 -*-
 #2.X用raw_input,3.X用input
 #if和else的基本用法
 name = input("Username:")
 pwd = input("Password:")
 if name == "alex" and pwd =="":
     print ('yes!')
 else:
     print('no!')