Pass in the previous text parse Method returns a MyscrapyItem Object to save the captured data to the specified file , This article will introduce another way to save data ：ItemLoader.
Essentially ,ItemLoader Object also returns a item How to save data , It's just ItemLoader Object will item and response（ The object used to obtain response data from the server ） It was packaged .
ItemLoader The common parameters of class construction methods are 2 individual ：item and response, among item Is used to specify the Item object （ In this case MyscrapyItem object ）,response Used to specify the object to get data from the service （ This example is response, It's also parse Methods the first 2 Parameters ）.
The following example will pass a ItemLoader Objects and XPath Intercept the title of the first article in the article list 、 Summary and Url. They are stored separately in title、abstract and href Of the three attributes . Finally, when running the web crawler, it will pass “-o” Command line parameters specify the type of file to save （ Determine the file type by extension ）, After successful operation , The captured data will be saved to the specified file .
import scrapy
from scr
