scrapy爬取豆瓣电影top250

 1 # -*- coding: utf-8 -*-
 2 # scrapy爬取豆瓣电影top250
 3
 4 import scrapy
 5 from douban.items import DoubanItem
 6
 7
 8 class DoubanspiderSpider(scrapy.Spider):
 9     name = "doubanspider"
10     # allowed_domains = ["movie.douban.com/top250"]注意这里的主页限制,一旦翻页可能超出范围
11     start_urls = [‘http://movie.douban.com/top250‘]
12
13     def parse(self, response):
14         item = DoubanItem()
15         for each in response.css(‘.article .grid_view li‘):
16             title = each.css(‘.item .hd .title:nth-child(1)::text‘).extract_first()
17             content = each.css(‘.item .bd p::text‘).extract_first().strip()
18             rating_num = each.css(‘.item .bd .star .rating_num::text‘).extract_first()
19             quote = each.css(‘.item .bd .quote span::text‘).extract_first()
20             image = each.css(‘.item .pic a img::attr(src)‘).extract_first()
21             item[‘title‘] = title
22             item[‘content‘] = content
23             item[‘rating_num‘] = rating_num
24             item[‘quote‘] = quote
25             item[‘image‘] = image
26
27             yield item
28
29         # 构造下一页的请求
30         next = response.css(‘.paginator .next a::attr(href)‘).extract_first()
31         if next:
32             url = ‘http://movie.douban.com/top250‘ + next
33             print(url)
34             yield scrapy.Request(url=url, callback=self.parse)