爬虫之JSON案例

Posted 2020-09-02 林深时见鹿

糗事百科实例：

爬取糗事百科段子，假设页面的URL是 http://www.qiushibaike.com/8hr/page/1

要求：

1. 使用requests获取页面信息，用XPath / re 做数据提取

2. 获取每个帖子里的用户头像链接、用户姓名、段子内容、点赞次数和评论次数

3. 保存到 json 文件内

参考代码

#qiushibaike.py

#import urllib
#import re
#import chardet

import requests
from lxml import etree

page = 1
url = \'http://www.qiushibaike.com/8hr/page/\' + str(page) 
headers = {
    \'User-Agent\': \'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (Khtml, like Gecko) Chrome/52.0.2743.116 Safari/537.36\',
    \'Accept-Language\': \'zh-CN,zh;q=0.8\'}

try:
    response = requests.get(url, headers=headers)
    resHtml = response.text

    html = etree.HTML(resHtml)
    result = html.xpath(\'//div[contains(@id,"qiushi_tag")]\')

    for site in result:
        item = {}

        imgUrl = site.xpath(\'./div/a/img/@src\')[0].encode(\'utf-8\')
        username = site.xpath(\'./div/a/@title\')[0].encode(\'utf-8\')
        #username = site.xpath(\'.//h2\')[0].text
        content = site.xpath(\'.//div[@class="content"]/span\')[0].text.strip().encode(\'utf-8\')
        # 投票次数
        vote = site.xpath(\'.//i\')[0].text
        #print site.xpath(\'.//*[@class="number"]\')[0].text
        # 评论信息
        comments = site.xpath(\'.//i\')[1].text

        print imgUrl, username, content, vote, comments

except Exception, e:
    print e

演示效果