【python 爬虫】豆瓣评论全爬取含展开

学会抓包，搞到一切。

用到的模块

源代码

from urllib import request
import time
import re
import os
os.mkdir(r'C:\Users\*\Desktop\PYhomework\c800')
search_counts = 800
url = 'https://movie.douban.com/subject/2353023/reviews'
headers = {***}
        
headers['Referer'] = 'https://movie.douban.com/subject/***/'
i = 0
lists = []
for count in range(0, search_counts, 20):
    url = url + "?start=" + str(count)
    req = request.Request(url, headers=headers)
    response = request.urlopen(req)
    HTML = response.read()
    HTML = HTML.decode("utf-8")
    pattern = re.compile("
")
    lists = pattern.findall(HTML) + lists
    '''爬取实际评论'''
headers[
 'Cookie'] = '***'
headers['Host'] = 'movie.douban.com'
headers['Sec-Fetch-Dest'] = 'document'
headers['Sec-Fetch-Mode'] = 'navigate'
headers['Sec-Fetch-Site'] = 'none'
headers['Sec-Fetch-User'] = '?1'
headers['Upgrade-Insecure-Requests'] = '1'
print('爬取成功！')

for id in lists:
    i += 1
    url = 'https://movie.douban.com/j/review/' + id + '/full'
    req = request.Request(url, headers=headers)
    response = request.urlopen(req)
    comment = response.read()
    comment = comment.decode("utf-8")
    with open(r"C:\Users\*\Desktop\PYhomework\c800\comment%d.txt" % i, mode="w", encoding="utf-8") as c:
        c.write(comment)
        print("comment%d保存成功！" % i)
    time.sleep(0)  # 随缘设置

print("抓取完成！")

爬取的结果

数据清洗

import os
import re
os.mkdir("c800ok")
for i in range(1, 801):
    with open(r"C:\Users\*\Desktop\PYhomework\c800\comment%d.txt" % i, encoding="utf-8") as f:
        f = f.read()
        start = f.find(",\"html\":\"")
        end = f.find('\"}')
        strings = f[start+9: end]
        strings = re.sub('
', '\n', strings)
        strings = strings.replace('\\t', '\n')
        strings = strings.replace(' ', '')
        with open(r'C:\Users\*\Desktop\PYhomework\c800ok\clear_comment%d.txt' % i, mode="w", encoding="utf-8") as fs:
            fs.write(strings)
            print('写入成功！')

清洗结果

源码：https://tominochick.github.io/