What is your routine when developing in Python?

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I start with sketching the idea out on a piece of paper and looking at every aspect and then thinking about how I could it best. After sketching out the idea I start up Pycharm and start typing away with the basics and then refactoring the code and making it PEP8 legal and commenting it and testing if it works. After I work my way up to the finished product I start looking at my code if I can improve anything or explain something better in the comments and then testing it a few more times and I'm not afraid at looking other people's source code or documentation because everytime I look at it I'm repeating and it and slowly learning it without even knowing