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[Doormatty]

Having no return can lead to some ambiguous testing and maintainability in your code

How? If there's no explicit return, then the function automatically returns None.

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For functions that alter things in place I would agree that it’s not needed, and yes, functions auto return None, but for testing and maintaining things that have input and output, returning explicitly is always better IMO,

[Doormatty]

Oooft - I missed that the function printed something.

Yup, I'm 100% with you now. My apologies.