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Add to SafariWhen comparing Think Python vs CheckiO, the Slant community recommends Think Python for most people. In the question“What are the best resources to learn Python?” Think Python is ranked 5th while CheckiO is ranked 18th. The most important reason people chose Think Python is:
The book is available for free in PDF and HTML formats. A hardcover version can be bought from [Amazon](http://www.amazon.com/gp/product/144933072X).
Question Ranking
Pros
Pro Free versions available
The book is available for free in PDF and HTML formats. A hardcover version can be bought from Amazon.
Pro Beginner-friendly
Think Python is a free book designed for those with no background in programming. It starts with basic concepts of programming, and is carefully designed to define all terms when they are first used and to develop each new concept in a logical progression. Larger pieces, like recursion and object-oriented programming are divided into a sequence of smaller steps and introduced over the course of several chapters.
Pro Community backed solution reviews
Users can publish their solutions for different problems and other users can review the code and give their opinions on how they would have solved the problem.
Sometimes, some of the most active users get their code reviewed by Guido Van Rossum (the creator of the Python language) himself.
Pro Available in multiple languages
CheckiO crowdsources translations for problems. Currently problems have been translated in 10 languages. So it's highly possible that eventually more languages will be supported.
Pro Ability to create new challenges
New missions can be created and uploaded using GitHub. After that is done, it's suggested to CheckiO and if it fills all the requirements after being reviewed by a CheckiO team member, it's pulled into the game.
Pro Challenges from GitHub, O'Reilly, Dropbox and Hubspot.
Cons
Con Some missing instructions for absolute beginners
Some exercises sometimes require taking steps that aren't explained. Some functions and commands are used without explaining their purpose.
Con Not for absolute beginners
CheckiO does not teach syntax, instead it teaches how to solve problems using a particular programming language therefore some basic programming knowledge is required to start.
