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 Regex to Extract Data

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...