Web Scraping with Python

Successfully scrape data from any website with the power of Python
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Web Scraping with Python

Richard Lawson

Successfully scrape data from any website with the power of Python
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Book Details

ISBN 139781782164364
Paperback174 pages

Book Description

The Internet contains the most useful set of data ever assembled, largely publicly accessible for free. However, this data is not easily reusable. It is embedded within the structure and style of websites and needs to be carefully extracted to be useful. Web scraping is becoming increasingly useful as a means to easily gather and make sense of the plethora of information available online. Using a simple language like Python, you can crawl the information out of complex websites using simple programming.

This book is the ultimate guide to using Python to scrape data from websites. In the early chapters it covers how to extract data from static web pages and how to use caching to manage the load on servers. After the basics we'll get our hands dirty with building a more sophisticated crawler with threads and more advanced topics. Learn step-by-step how to use Ajax URLs, employ the Firebug extension for monitoring, and indirectly scrape data. Discover more scraping nitty-gritties such as using the browser renderer, managing cookies, how to submit forms to extract data from complex websites protected by CAPTCHA, and so on. The book wraps up with how to create high-level scrapers with Scrapy libraries and implement what has been learned to real websites.

What You Will Learn

  • Extract data from web pages with simple Python programming
  • Build a threaded crawler to process web pages in parallel
  • Follow links to crawl a website
  • Download cache to reduce bandwidth
  • Use multiple threads and processes to scrape faster
  • Learn how to parse JavaScript-dependent websites
  • Interact with forms and sessions
  • Solve CAPTCHAs on protected web pages
  • Discover how to track the state of a crawl

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Book Details

ISBN 139781782164364
Paperback174 pages
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