1. 2008. Hidden features of Python (The Explanation of Chain Comparison). https://stackoverflow.com/questions/101268/hidden-features-of-python
2. 2010. Expanding tuples into arguments. https://stackoverflow.com/questions/1993727/expanding-tuples-into-arguments
3. 2011. How do chained assignments work. https://stackoverflow.com/questions/7601823/how-do-chained-assignments-work
4. 2012. Why does (1 in [1 0] == True) evaluate to False? https://stackoverflow.com/questions/9284350/why-does-1-in-1-0-true-evaluate-to-false?
5. 2013. Explanation of how nested list comprehension works. https://stackoverflow.com/questions/20639180/explanation-of-how-nested-list-comprehension-works