Python 发送邮件给一个人，发送内容为文本

python 发送邮件给单个人，  需要修改以下三个地方（好久之前写过的代码，做个记录）。

_user = "xx@qq.com"  //QQ邮箱
_pwd = "授权码"  //QQ的授权码  
_to = "yy@163.com"  //163邮箱 或其他邮箱

#!/usr/bin/env python
# -*-coding:utf-8-*-

import smtplib
from email.mime.text import MIMEText

_user = "xx@qq.com"  //QQ邮箱
_pwd = "授权码"  //授权码
_to = "yy@163.com"  //163邮箱

msg = MIMEText("Test")
msg["Subject"] = " don't panic"
msg["From"] = _user
msg["To"] = _to

try:
    s=smtplib.SMTP_SSL("smtp.qq.com",465)
    s.login(_user,_pwd)
    s.sendmail(_user,_to,msg.as_string())
    s.quit()
    print("Success!")
except smtplib.SMTPException as e:
    print("Failed,%s"%e)