利用正则+requests爬取猫眼电影信息

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

 def get_one_page(url):
     try:
         headers={"user-agent":'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36'}
         response = requests.get(url,headers=headers)
         if response.status_code == 200:
             return response.text
         return None
     except RequestException:
         return None

 def parse_one_page(html):
     pattern = re.compile('<dd>.*?board-index.*?>(\d+)</i>.*?data-src="(.*?)".*?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],
             'image': item[1],
             'title': item[2],
             'actor': item[3].strip()[3:],
             'time': item[4].strip()[5:],
             'score': item[5]+item[6]
         }

 def write_to_file(content):
     with open('result.txt', 'a', encoding='utf-8') as f:
         f.write(json.dumps(content, ensure_ascii=False) + '\n')
         f.close()

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

 if __name__ == '__main__':
      for i in range(10):
           main(i*10)

注：需要重置requests的headers,否则猫眼电影拒绝访问。