[Autogenerated] Now it's time to talk about item loaders.
These are simple, convenient mechanisms that are used for populating items.
Let's explore an example.
Let's start off by importing item loader from scrapie dot loader and the
book Object from Items a pie that we looked at previously.
Then within parts.
We create an item loader object and pass it the book class as
its item and the Spider Scraped response,
which contains the raw data that the processors will clean and validate.
As we saw in the previous example for each book field,
we call either the ad XPath or at CSS or at value methods,
which basically retrieved their respective raw field values from
the markup and assign them to the book object.
Each use its its own XPath, or CSS selector.
Then Load Island is called,
which triggers the execution of the pre and post processing logic