Web scraping is a technique for gathering data or information on web pages. You could revisit your favorite web site every time it updates for new information. Or you could write a web scraper to have it do it for you!
Besides looking at how websites are put together, we will also discuss the ethics of scraping. What is legal? How can you be a friendly scraper, so that the administrator of the website you are scraping won’t try to shut you down?