name, which is our Spider's name (that you can run using scrapy runspider spider_name).Here, we created our own EcomSpider class, based on scrap.Spider, and add three fields It's a simple container for our scraped data and Scrapy will look at this item's fields for many things like exporting the data to different format (JSON / CSV.), the item pipeline etc.įrom product_ems import ProductĪllowed_domains = With Scrapy you can return the scraped data as a simple Python dictionary, but it is a good idea to use the built-in Scrapy Item class. For each category you would need to handle pagination Then for each product the actual scraping that generate an Item so a third parse function. This method would then yield a Request object to each product category to a new callback method parse2(). You could start by scraping the product categories, so this would be a first parse method. Let's say you want to scrape an E-commerce website that doesn't have any sitemap. You may wonder why the parse method can return so many different objects. ![]() The parse() method will then extract the data (in our case, the product price, image, description, title) and return either a dictionary, an Item or Request object, or an Iterable.It will then fetch the content of each URL and save the response in a Request object, which it will pass to parse().change the HTTP method/verb and use POST instead of GET or add authentication credentials) You can override start_requests() to customize this steps (e.g. It starts by using the URLs in the class' start_urls array as start URLs and passes them to start_requests() to initialize the request objects. ![]() Here are the different steps used by a Spider to scrape a website: With Scrapy, Spiders are classes where you define your crawling (what links / URLs need to be scraped) and scraping (what to extract) behavior. Scrapy doesn't execute any JavaScript by default, so if the website you are trying to scrape is using a frontend framework like Angular / React.js, you could have trouble accessing the data you want. In : response.css ( '.my-4 > span::text' ).get ()
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