使用Python抓取豆瓣影评数据的方法

https://movie.douban.com/subject/26322642/comments"text-align: center">

于是采用下面的代码进行判断是否还有下一个页面


if next_url:
    visit_URL('https://movie.douban.com/subject/24753477/comments'+next_url)



  
用requests发送请求，beautifulsoup进行网页解析


把数据写入txt


import requests
from bs4 import BeautifulSoup
first_url = 'https://movie.douban.com/subject/26322642/comments"text-align: center">

至于怎么模拟移动端只需要将user-agent修改为移动端的头


useragents = [
  "Mozilla/5.0 (iPhone; CPU iPhone OS 9_2 like Mac OS X) AppleWebKit/601.1 (KHTML, like Gecko) CriOS/47.0.2526.70 Mobile/13C71 Safari/601.1.46",
  "Mozilla/5.0 (Linux; U; Android 4.4.4; Nexus 5 Build/KTU84P) AppleWebkit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30",
  "Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0)"




怎么获取这些头部？用火狐的插件user-agent switcher
之后的操作就是解析json


import random
import requests
import json
import time
first_url = 'https://m.douban.com/rexxar/api/v2/tv/26322642/interests"Mozilla/5.0 (iPhone; CPU iPhone OS 9_2 like Mac OS X) AppleWebKit/601.1 (KHTML, like Gecko) CriOS/47.0.2526.70 Mobile/13C71 Safari/601.1.46",
  "Mozilla/5.0 (Linux; U; Android 4.4.4; Nexus 5 Build/KTU84P) AppleWebkit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30",
  "Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0)"
]
def visit_URL(i):
  print(">",i)
  # 请求头部
  headers = {
    'Host':'m.douban.com',
    'Upgrade-Insecure-Requests':'1',
    'User-Agent':random.choice(useragents)
  }
  params = {
    'count':'50',
    'order_by':'hot',
    'start':str(i),
    'for_mobile':'1',
    'ck':'dNhr'
  }
  res = requests.get(url=url,headers=headers,params=params)
  res_json = res.json()
  interests = res_json['interests']
  print(len(interests))
  for item in interests:
    with open('huge.txt','a',encoding='utf-8') as file:
      if item['user']:
        if item['user']['name']:
          file.write('评论用户:'+item['user']['name']+'\n')
      else:
        file.write('评论用户:none\n')
      if item['create_time']:
        file.write('评论时间:'+item['create_time']+'\n')
      else:
        file.write('评论时间:none\n')
      if item['comment']:
        file.write('评论内容:'+item['comment']+'\n')
      else:
        file.write('评论内容:none\n')
      if item['rating']:
        if item['rating']['value']:
          file.write('对电影的评分:'+str(item['rating']['value'])+'\n\n')
      else:
        file.write('对电影的评分:none\n')
if __name__ == '__main__':
  for i in range(0,66891,20):
    # time.sleep(2)
    visit_URL(i)





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