多线程爬取猫眼电影TOP100并保存到mongo数据库中

 import requests
 import re
 import json
 from requests.exceptions import RequestException
 from multiprocessing import Pool

 #　获取网页
 def get_one_page(url):
     headers = {
         'User-Agent':'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)'+
                      'Chrome/63.0.3239.132 Safari/537.36'}
     try:
         resp = requests.get(url,headers=headers)
         if resp.status_code == 200:
             return resp.text
         return None
     except RequestException:
         return None
 # 解析网页
 def parse_one_page(html):
     pattern = re.compile('<dd>.*?board-index.*?>(\d+)</i>.*?name"><a'
                          +'.*?>(.*?)</a>.*?star">(.*?)</p>.*?releasetime">(.*?)</p>'
                          +'.*?integer">(.*?)</i>.*?fraction">(.*?)</i>.*?</dd>',re.S)
     items = re.findall(pattern,html)
     for item in items:
         yield{
             'index':item[0],
             'title':item[1],
             'actor':item[2].strip(),
             'time':item[3],
             'score':item[4]+item[5],
             # 'image': item[6],
         }
 #　保存数据
 def write_to_file(content):
     with open('TOP1OO.txt','a',encoding='utf-8') as f:
         f.write(json.dumps(content,ensure_ascii=False)+'\n')

 def main(offset):
     url = 'http://maoyan.com/board/4?offset='+str(offset)
     html = get_one_page(url)
     for item in parse_one_page(html):
         write_to_file(item)

 if __name__ == '__main__':
     # for i in range(10):
     #     main(i*10)
     pool = Pool()
     pool.map(main,[i*10 for i in range(10)])