Preface
The Internet contains the most useful set of data ever assembled, which is 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 extracted to be useful. This process of extracting data from web pages is known as web scraping and is becoming increasingly useful as ever more information is available online.
What this book covers
Chapter 1, Introduction to Web Scraping, introduces web scraping and explains ways to crawl a website.
Chapter 2, Scraping the Data, shows you how to extract data from web pages.
Chapter 3, Caching Downloads, teaches you how to avoid redownloading by caching results.
Chapter 4, Concurrent Downloading, helps you to ...
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