python抓取猫眼电影列表

抓取地址：http://maoyan.com/board/4

分析url分页规则:http://maoyan.com/board/4?offset=0

其中offset参数值为0到90

用到的库:

PyQuery：html解析器,语法类似jquery

fake_useragent;用于伪造头部浏览器信息,防爬虫屏蔽
相关代码:

import requests
from requests.exceptions import RequestException
from pyquery import PyQuery as pq
from fake_useragent import UserAgent
from multiprocessing import Pool
import json
def gethtml(offset):

     try:
         ua = UserAgent()

        #防爬虫机制,加入头部信息
         headerinfo={
                    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
                    "Accept-Encoding":"gzip, deflate",
                    "Accept - Language": "zh - CN, zh;q = 0.9",

                      "Cookie":"uuid=1A6E888B4A4B29B16FBA1299108DBE9CE735E380ECAF25EF34C1CC12335D50D6; _csrf=e8acf6c957d5647db54a08ec5ec00849f7c0ef59dffcfa41e04822d7d8c5a730; _lxsdk_cuid=162a8e9c82bc8-0047562353d544-5e163117-1fa400-162a8e9c82bc8; _lxsdk=1A6E888B4A4B29B16FBA1299108DBE9CE735E380ECAF25EF34C1CC12335D50D6; __mta=56065556.1523252316455.1523252362387.1523252369506.6; _lxsdk_s=162a8e9c82b-699-947-0cd%7C%7C14",
                       "Host": "maoyan.com",
                       "Proxy-Connection": "keep-alive",
                       "Upgrade-Insecure-Requests": "",
                        "User-Agent":ua.random

             }

         respsonse= requests.get("http://maoyan.com/board/4?offset="+str(offset), headers=headerinfo)
         if respsonse.status_code==200:
             return respsonse.text
         return None
     except RequestException as ex :
        print(ex)
     return None

def getContent(offset):
    result=gethtml(offset)
    p=pq(result)
    for item in p(".board-wrapper dd").items():

        print(item('.name').text())
        write_to_file({"title":item('.name').text(),
            "actor":item('.star').text()[3:],
            "releasetime":item('.releasetime').text()[5:],
            "score":item('.score').text()})

##写入到文件中
def write_to_file(content):
   with open('maoyan.txt','a',encoding='utf-8') as f:
       f.write(json.dumps(content,ensure_ascii=False)+"\n")
       f.close()

if __name__ == '__main__':

    #开启线程池，使用多线程抓取
      p=Pool()
      p.map(getContent,[i*10 for  i in range(0,10)])