Scraping the web always was like an "illegal" behavior for me until I learned and discovered amazing things I can do with it. Then I discovered the Scrapy framework and things became more and more exciting.
This is a talk given to the Universidad Tecnológica de la Huasteca Hidalguense students of Computer Science, they usually don't explore these kind of topics, so I had the initiative to share my experience crawling the web to them.