Scrapy at a glance预览

1、安装scrapy

2、创建爬虫项目 scrapy startproject test_scrapy

3、创建quotes_spider.py文件
4、复制下面代码到quotes_spider.py文件
import scrapy #导入模块
#编写QuotesSpider类

class QuotesSpider(scrapy.Spider):
    name = "quotes"
    #爬取网站地址
    start_urls = [
        'http://quotes.toscrape.com/tag/humor/',
    ]
    def parse(self, response): #定义解析方法
        for quote in response.css('div.quote'):   #解析class="quote"的div
            #采用字典记录，爬取内容部分定义
            yield {
                'text': quote.css('span.text::text').extract_first(),
                'author': quote.xpath('span/small/text()').extract_first(),
            }
        #下一页地址
        next_page = response.css('li.next a::attr("href")').extract_first()
        if next_page is not None:
            yield response.follow(next_page, self.parse)
5、cd test_scrapy 到quotes_spider.py文件目录
6、运行scrapy runspider quotes_spider.py -o quotes.json命令
可看到目录下多了quotes.json文件
打开quotes文件可看到

[
{"text": "u201cThe person, be it gentleman or lady, who has not pleasure in a good novel, must be intolerably stupid.u201d", "author": "Jane Austen"},
{"text": "u201cA day without sunshine is like, you know, night.u201d", "author": "Steve Martin"},
{"text": "u201cAnyone who thinks sitting in church can make you a Christian must also think that sitting in a garage can make you a car.u201d", "author": "Garrison Keillor"},
{"text": "u201cBeauty is in the eye of the beholder and it may be necessary from time to time to give a stupid or misinformed beholder a black eye.u201d", "author": "Jim Henson"},
{"text": "u201cAll you need is love. But a little chocolate now and then doesn't hurt.u201d", "author": "Charles M. Schulz"},
{"text": "u201cRemember, we're madly in love, so it's all right to kiss me anytime you feel like it.u201d", "author": "Suzanne Collins"},
{"text": "u201cSome people never go crazy. What truly horrible lives they must lead.u201d", "author": "Charles Bukowski"},
{"text": "u201cThe trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it.u201d", "author": "Terry Pratchett"},
{"text": "u201cThink left and think right and think low and think high. Oh, the thinks you can think up if only you try!u201d", "author": "Dr. Seuss"},
{"text": "u201cThe reason I talk to myself is because Iu2019m the only one whose answers I accept.u201d", "author": "George Carlin"},
{"text": "u201cI am free of all prejudice. I hate everyone equally. u201d", "author": "W.C. Fields"},
{"text": "u201cA lady's imagination is very rapid; it jumps from admiration to love, from love to matrimony in a moment.u201d", "author": "Jane Austen"}
]