If these libraries don't exist in your current Python setup, refer to Chapter 2, Python and the Web – Using urllib and Requests, the Setting things up section, for more information on their installation and how to set them up. So far, we have learned about web technologies, data finding techniques, and how to access web content using Python libraries.
Regular Expressions (Regex or regex) is actually a pattern that's built using predefined commands and formats to match the desired content. Regex provides a great value during data extraction when there is no particular layout or markup patterns to be chosen and can be applied with other techniques such as XPath, and CSS selectors.
Complex web content and data in general text or character format might require the use of Regex to complete activities, such as matching and extraction, plus...
