import requests
 import lxml.html
 import csv
 etree = lxml.html.etree
 temp = r'C:\Users\86177\Desktop'+'\\'+'doubanmovie'
 with open(temp + '.csv', 'w') as f:
     csvwriter = csv.writer(f, dialect='excel')
     csvwriter.writerow(['title','info','average','link'])
 header ={'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)  AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.7 Safari/537.36'}
 for n in range(11):
     url = 'https://movie.douban.com/top250?start=%s&filter='.format((n-1)*5)
     response = requests.get(url,headers=header)
     response.encoding = "utf-8"
     html1 = etree.HTML(response.text)
     h = html1.xpath('//div[@class="info"]')
     for sech in h:
         i = sech
         title = i.xpath('div[@class="hd"]/a/span[@class="title"]/text()')
         othertitle = i.xpath('div[@class="hd"]/a/span[@class="other"]/text()')
         info = i.xpath('div[@class="bd"]/p/text()')
         average = i.xpath('div[@class="bd"]/div[@class="star"]/span[@class="rating_num"]/text()')
         link = i.xpath('div[@class="hd"]/a/@href')
 
         for a, b, c, d in zip(title,  info, average, link):
             print(a, b, c, d)
 
             with open(temp + '.csv', 'w')  as f:
                 csvwriter =  csv.writer(f, dialect='excel')
                 csvwriter.writerow([a,  b, c, d])