Going past the basics: functools.partial and lru_cache, closures, recursion, and a real refactor of imperative code into a functional shape.

A beginner-friendly look at how functions work in Python when you treat them the functional-programming way — first-class objects, pure functions, and the map/filter/reduce trio.

Why functional programming in Python isn't about purity — it's about writing code that's easier to reason about, test, and compose.