May 2017
Beginner to intermediate
220 pages
5h 2m
English
Content preview from Python Web Scraping - Second Edition
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Avoiding spider traps
Currently, our crawler will follow any link it hasn't seen before. However, some websites dynamically generate their content and can have an infinite number of web pages. For example, if the website has an online calendar with links provided for the next month and year, then the next month will also have links to the next month, and so on for however long the widget is set (this can be a LONG time). The site may offer the same functionality with simple pagination navigation, essentially paginating over empty search result pages until the maximum pagination is reached. This situation is known as a spider trap.
A simple way to avoid getting stuck in a spider trap is to track how many links have been followed to reach the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.