Python-利用beautifulsoup写个豆瓣热门图书爬虫

小鱼儿 2021-04-23 16:23 523阅读 0赞

Anaconda3里边自带了bs4的包，省的我自己安装了。

最近觉得模块化的写法可以让代码变得清晰易读。而且随着代码的增多，找bug也会更方便。（目前我还写不出这么多）而且模块化有种工具化的思想，拿来主义的思想在里面，使用工具可是人等少数智慧动物的专利啊。之后也要多学习使用\[try - except\]的写法，可以直观的看出错误。

初学网页爬虫，目前只会爬取豆瓣这样清晰好看的静态网页，对于复杂的js控制的动态网页，我现在还束手无策。

# -*- coding: utf-8 -*-
     """
     Created on Tue Jan  2 17:44:30 2018
     
     @author: xglc
     找到豆瓣图书的【新书速递】内容
     """
     import requests
     from bs4 import BeautifulSoup
     
     def _gethtml():
         try:
             req = requests.get('https://book.douban.com/')
             data1 = []
             data1.append(req.text)
         except Exception as e:  
             raise e 
         return data1
     
     def _getdata(html):
         title = []
         author = []
         data2 = {}
         soup = BeautifulSoup(html,'html.parser')
         for li in soup.find('ul',attrs={
       'class':'list-col list-col5 list-express slide-item'}).find_all("li"):
             title.append(li.find('div',class_='info').find('div',class_='title').text)
             author.append(li.find('div',class_='info').find('div',class_='author').text)
         data2['title'] = title
         data2['author'] = author
     #    print (data2)
         return data2
     
     def _txt(data3):
         with open('f://book.txt','w') as f:
             for title in data['title']:
                 f.write(title)
             f.close
             
     if __name__ == '__main__':  
         htmls = _gethtml()  
         data = _getdata(htmls[0])
         _txt(data)
     #    print (data['title'])