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Every team eventually gets the question: "Who changed this order, and what did it look like before?" The usual first answer is to add audit logging i

Every codebase has them: if status == "shiped":, if role == 3:, set_mode("fast"). Magic strings and numbers work right up until someone makes a

Python leans on duck typing: if an object has the method you need, you call it and move on. That works well until you have a family of classes that a

A lot of classes exist mainly to hold data: a product with a SKU and a price, a config object with a host and a port, a point with x and y. Writing t

Python classes can have three kinds of methods. Regular instance methods are the ones you write all the time. Then there are methods decorated with `

If you've come to Python from Java or C#, your instinct when writing a class might be to make every field private and add get_price() and `set_pric