python 输入用户名和密码隐藏显示及判断

本人用python3.6写的，2.几的版本可能会运行出错
输入密码隐藏显示及判断
import getpass     #调用getpass
username =input('uarname:')

password =getpass.getpass('password:')

print(username,password)     #getpass在pycharm中不好用，在命令提示符运行此代码，例如: python 文件所在路径

_username='hehe'
_password ='abc123'

username =input('uarname:')
password =input('password:')

if _username ==username and _password ==password :
    print('Welcome user {name} login...' .format(name=username))

else:
    print('Invalid uername or password!')