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 i\u2019m 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"}
]