python 添加用户设置密码并发邮件给root用户

#!/usr/bin/env python
#coding: utf8
import os
import sys
import mkpasswd //这是之前写的，直接调用
import string
content = """username: ${user}
password: ${password}"""
t = string.Template(content)
def adduser(username,pwd):
os.system("useradd %s" % username)
os.system("echo %s | passwd --stdin %s" % (pwd,username))
os.system("echo -e '%s' | mail -s 'user info' root" % 

(t.substitute(user=username,password=pwd))
)
if __name__ == "__main__":
if len(sys.argv) != 2:
print ("Usage: ./useradd.py username")
else:
adduser(sys.argv[1],mkpasswd.mkpasswd())