「豆瓣读书250」爬取豆瓣TOP250书单

豆瓣读书250

小白学习爬虫

爬取豆瓣TOP250的书，正好本人也喜欢看书

思路分析：

https://book.douban.com/top250这是TOP250第一页的链接

https://book.douban.com/top250?start=25第二页的链接

https://book.douban.com/top250?start=50第三页的链接

将第一页链接改为https://book.douban.com/top250?start=0也是可以访问的，每一页数字加25，构建10页网址

代码如下：

urls = ['https://book.douban.com/top250?start={}'.format(str(i))
        for i in range(0,250,25)]

获取的书单信息包括：书名，详细链接，作者，出版社，出版时间，价格，评分和简评

详细代码如下：

import requests
from lxml import etree
import csv

headers  = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36'
}

f = open('C:/Users/qinhan/Desktop/doubanbook.scv','wt',newline='',encoding='utf-8')
writer = csv.writer(f)
writer.writerow(('name','url','author','publisher','data','price','rate','comment'))#创建csv

urls = ['https://book.douban.com/top250?start={}'.format(str(i))
        for i in range(0,250,25)]

for url in urls:
    html = requests.get(url,headers = headers)#加入请求头
    selector = etree.HTML(html.text)
    infos = selector.xpath('//tr[@class="item"]')    #取大标签（1）

    for info in infos:
        name = info.xpath('td/p/a/@title')[0] 
        url = info.xpath('td/p/a/@href')[0]
        book_info = info.xpath('td/p/text()')[0]    #/text()获取标签中文字信息
        author = book_info.split('/')[0]
        publisher = book_info.split('/')[-3]  
        data = book_info.split('/')[-2]
        price = book_info.split('/')[-1]            #（2）
        rate = info.xpath('td/p/span[2]/text()')[0]
        comments = info.xpath('td/p/span/text()')
        comment = comments[0] if len(comments) != 0 else "空"
        writer.writerow((name,url,author,publisher,data,price,rate,comment))

f.close()

（1）大标签