cat login.py
#!/usr/bin/python
import getpass ###getpass模块中的getpass方法
usname = raw_input('username:') ###接收用户输入的字符
passwd = getpass.getpass('password:') ###将敏感的密码隐藏
if usname == 'bob' and passwd == '123456':
print "Login successful"
else:
print "login incorrect"
