博文配套视频课程:24小时实现从零到AI人工智能
豆瓣电影页分析
已经向您讲解了如何在 XML 文档中查找信息,具体来说已经学会了如果获取元素、内容、属性,并且还知道如何通过标签的属性来进筛选与过滤。本章节来讲解如何通过xpath获取豆瓣的数据
第一页下载实现
# -*- coding: utf-8 -*-
import scrapy
from lxml import etree
from douban.items import DoubanItem
class DoubanSpiderSpider(scrapy.Spider):
name = 'douban_spider'
# 允许下载的域名
allowed_domains = ['movie.douban.com']
# 配置下载的首地址
start_urls = ['http://movie.douban.com/top250']
def parse(self, response):
# print(response.text)
html = etree.HTML(response.text)
# 首先通过xpath获取ol
li_list = html.xpath("//ol[@class='grid_view']/li")
for li in li_list:
item = DoubanItem()
# em = title = img = comment
print(li.xpath(".//em/text()")[0])
print(li.xpath(".//span[@class='title']/text()")[0])
print(li.xpath(".//img/@src")[0])
print(li.xpath(".//div[@class='star']/span/text()")[-1])
前5部电影数据如下
1
肖申克的救赎
https://img3.doubanio.com/view/photo/s_ratio_poster/public/p480747492.jpg
1551310人评价
2
霸王别姬
https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2561716440.jpg
1146654人评价
3
这个杀手不太冷
https://img3.doubanio.com/view/photo/s_ratio_poster/public/p511118051.jpg
1399607人评价
4
阿甘正传
https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2559011361.jpg
1209414人评价
5
美丽人生
https://img3.doubanio.com/view/photo/s_ratio_poster/public/p510861873.jpg
708487人评价