爬虫入门：爬取CSDN每天都的访问量并发送邮件到邮箱

直接上代码了：

# -*- coding: utf-8 -*-



__author__ = 'Peng'
from bs4 import BeautifulSoup,Comment
import urllib2
from urllib2 import urlopen,HTTPError
import MySQLdb
import json
import datetime
import logging
import sys
import re
import time
import random
import ConfigParser

import smtplib
from email.mime.text import MIMEText
from email.header import Header
reload(sys)
sys.setdefaultencoding('utf8')
# 配置日志信息 输出到控制台
logging.basicConfig(level=logging.INFO,
                format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',
                datefmt='%a, %d %b %Y %H:%M:%S',
                stream=sys.stdout)


def SendEmail(mail_msg):
    config = ConfigParser.ConfigParser()
    config.readfp(open("config.ini"), "r")
    strFrom = config.get("email", "sender")
    strTo = config.get("email", "receivers")

    message = MIMEText(mail_msg, 'html', 'utf-8')
    subject = 'CSDN 数据监控'
    message['Subject'] = Header(subject, 'utf-8')
    message['To'] = strTo;
    message['From'] = strFrom;
    smtp = smtplib.SMTP('smtp.qq.com')
    smtp.login(config.get("email", "sender"),config.get("email", "passwd"))
    try:
        smtp.sendmail(strFrom,strTo,message.as_string())
    finally:
        smtp.close



def getContent(url,webname):
    #创建字典用来储存函数的返回结果
    dict={'access':'','score':'','level':'','ranking':'','getTime':''}

    #创建请求头
    headers={"User-Agent":"Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 "
                          "(KHTML, like Gecko) Chrome/58.0.3029.96 Safari/537.36",
             "Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
             "Accept-Language":"zh-CN,zh;q=0.8,en;q=0.6",
             "Referer":"https://www.baidu.com/s?ie=UTF-8&wd=sina"}

    #打开网页
    try:
        request = urllib2.Request(url,headers=headers)
        html = urlopen(request)
    except HTTPError as e:
        print(e)

    #解析内容时如果有异常就捕获并返回空
    try:
        #读取网页内容并转换成树形文档结构
        soup = BeautifulSoup(html.read(),"lxml")

        #去除html注释
        for element in soup(text=lambda text: isinstance(text, Comment)):
            element.extract()

        #过滤JavaScript
        [s.extract() for s in soup('script')]

        #获取blog_rank
        access = soup.find(id="blog_rank").find_all('li')[0].span.get_text()
        score = soup.find(id="blog_rank").find_all('li')[1].span.get_text()
        ranking = soup.find(id="blog_rank").find_all('li')[3].span.get_text()
        logging.info("access:%s,score:%s,ranking,%s" %(access,score,ranking))

        #直接传html过去
        dict['access'] = soup.find(id="blog_rank").find_all('li')[0]
        dict['score'] = soup.find(id="blog_rank").find_all('li')[1]
        dict['ranking'] = soup.find(id="blog_rank").find_all('li')[3]

        # print dict['access']
        # print dict['score']
        # print dict['ranking']

    except:
        return None
    return dict





logging.info("begin spider csdn news")
url="http://blog.csdn.net/u011350541?viewmode=contents"
webname="csdn"
dict =  getContent(url,webname)
mail_msg = """

%s
%s
%s
%s

"""%(dict['access'],dict['score'],dict['ranking'],str(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")))
SendEmail(mail_msg)
logging.info("end spider csdn tech")

在加一个配置文件，如果你觉得好玩，可以把收件人设为我的邮箱

[email]
sender = 924701358@qq.com
passwd = passwd
receivers = 924701358@qq.com