Book Image

Hands-On Web Scraping with Python

By : Anish Chapagain
Book Image

Hands-On Web Scraping with Python

By: Anish Chapagain

Overview of this book

Web scraping is an essential technique used in many organizations to gather valuable data from web pages. This book will enable you to delve into web scraping techniques and methodologies. The book will introduce you to the fundamental concepts of web scraping techniques and how they can be applied to multiple sets of web pages. You'll use powerful libraries from the Python ecosystem such as Scrapy, lxml, pyquery, and bs4 to carry out web scraping operations. You will then get up to speed with simple to intermediate scraping operations such as identifying information from web pages and using patterns or attributes to retrieve information. This book adopts a practical approach to web scraping concepts and tools, guiding you through a series of use cases and showing you how to use the best tools and techniques to efficiently scrape web pages. You'll even cover the use of other popular web scraping tools, such as Selenium, Regex, and web-based APIs. By the end of this book, you will have learned how to efficiently scrape the web using different techniques with Python and other popular tools.
Table of Contents (16 chapters)
Free Chapter
Section 1: Introduction to Web Scraping
Section 2: Beginning Web Scraping
Section 3: Advanced Concepts
Section 4: Conclusion

Using LXML, XPath, and CSS Selectors

So far, we have learned about web-development technologies, data-finding techniques, and accessing web content using the Python programming language.

Web-based content exists in parts or elements using some predefined document expressions. Analyzing these parts for patterns is a major task for processing convenient scraping. Elements can be searched and identified with XPath and CSS selectors that are processed with scraping logic for required content. lxml will be used to process elements inside markup documents. We will be using browser-based development tools for content reading and element identification.

In this chapter, we will learn the following:

  • Introduction to XPath and CSS selectors
  • Using browser developer tools
  • Learning and scraping using the Python lxml library