代码概述：通过去指定的天气网站抓取本地当天信息，并且提取相关字段从而来判断是否要去带伞，并且发送邮件给指定用户；

import json
from urllib import request
from urllib.request import urlopen
import smtplib
from email.mime.text import MIMEText
from emilconf import *

def readUrl(url):
    # 生成字典， 指定用户代理为火狐浏览器， 而不是python脚本;
    headers = {'User-Agent': 'Firefox/23.0'}
    # 向url地址发起请求, 返回一个Request对象;
    req = request.Request(url, headers=headers)
    # 返回一个urlOpen对象， 该对象中包含访问的所有结果， 比如: 网页内容, 网页的状态码(200, 404)
    urlObj = urlopen(req)
    # 将读取的内容以utf-8编码显示;(中文显示不乱码)
    urlContent = urlObj.read().decode('utf-8')
    return  urlContent


def sendMail():


    def mail():
        msg = MIMEText(content, 'plain', 'utf8')
        msg['From'] = sender
        msg['To'] = receiver
        msg['Subject'] = subject

        return msg

    def sendmail():
        try:
            smt = smtplib.SMTP('smtp.163.com')
            smt.login(sender, passwd)
            msg = mail()
            smt.sendmail(sender, receiver, msg.as_string())
        except smtplib.SMTPException as e:
            print('发送失败：', e)
        else:
            print('发送成功！')

    return sendmail()
#
def main():
    url = "http://www.weather.com.cn/data/cityinfo/101110101.html"
    info = readUrl(url)
    d = json.loads(info)
    weather = d['weatherinfo']['weather']

    if '雨' in weather or '阴' in weather:
        sendMail()

main()