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It takes a lot of time and effort to get there. Obviously best practices from C++ carry over here as well, but some python specific

• Docstrings: help a lot in clearing the intent of author and at the same time can be invoked by the users!
• Unit testing: It helps in quickly checking if any code changes are giving expected results while refactoring
• Pythonic code: this one is pretty hard and takes time. You know good python code when you see it.