parsel.Selector

Parsel is a Python library used for extracting data from HTML and XML documents. It provides a powerful and flexible API for navigating and manipulating these structured documents. The `Selector` class in Parsel allows you to select elements from the document using CSS or XPath selectors.

With the `Selector` class, you can create a selector object by passing in the document string or response object. Then, you can use various methods to extract data based on your needs. For example, you can use the `css()` method to select elements using CSS selectors or the `xpath()` method to select elements using XPath expressions.

Here's an example of using `Selector` to select elements from an HTML document:

from parsel import Selector

# Create a selector object
selector = Selector(text=html_text)

# Select elements using CSS selectors
titles = selector.css('h1.title::text').getall()

# Select elements using XPath expressions
links = selector.xpath('//a/@href').getall()

# Do something with the extracted data
for title in titles:
    print(title)

for link in links:
    print(link)

In this example, `html_text` is the HTML document as a string. We create a `Selector` object using this HTML string, and then we use `css()` and `xpath()` methods to select elements based on CSS selectors and XPath expressions, respectively. Finally, we can process and use the extracted data as needed.

I hope this answers your question! Let me know if you have any more doubts.