Scrapy1.6 crawler frame 1 is mounted

Web crawlers: crawler is an automated program to take information website content, is widely used search engines and data mining and other fields.
The basic flow of execution Web Crawler: download page - data extraction page - Link Extractor page
Scrapy: is an open source web crawler framework written in Python language features: easy to use, cross-platform, flexible and easy to expand and so on.

installation

Native environment Mac 10.14, Python3
pip3 install scrapy
after successful installation scrapy -hView contains commands

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Creating a project
scrapy startproject tutorial

Generates the following files

tutorial/
    scrapy.cfg            # deploy configuration file
    tutorial/             # project's Python module, you'll import your code from here
        __init__.py
        items.py          # project items definition file
        middlewares.py    # project middlewares file
        pipelines.py      # project pipelines file
        settings.py       # project settings file
        spiders/          # a directory where you'll later put your spiders
            __init__.py

Writing your first reptile

In fact, write a class
to create the file quotes_spider.pyinto the tutorial/spidersdirectory

import scrapy

class QuotesSpider(scrapy.Spider):
   # 爬虫名，必须唯一
    name = "quotes"

    def start_requests(self):
        urls = [
            'http://quotes.toscrape.com/page/1/',
            'http://quotes.toscrape.com/page/2/',
        ]
        for url in urls:
            yield scrapy.Request(url=url, callback=self.parse)

    def parse(self, response):
        page = response.url.split("/")[-2]
        filename = 'quotes-%s.html' % page
        with open(filename, 'wb') as f:
            f.write(response.body)
        self.log('Saved file %s' % filename)

To the root directory of the project, the implementation of scrapy crawl quotes
the display process

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Results: more than two out of html files, mean that we crawled down the page.

Reference: https://docs.scrapy.org/en/1.6/intro/tutorial.html

Reproduced in: https: //www.jianshu.com/p/90ded0d8787f