Python namedtuple Tutorial: Readable, Structured Records

This tutorial builds a stock market data analyser to demonstrate Python named tuples from the ground up. It covers collections.namedtuple for basic named field access, immutability and _replace() for deriving adjusted records, the _fields, _asdict(), and _make() helpers, the typing.NamedTuple class syntax with type hints and defaults, named tuples as structured function return types, and a practical comparison with dataclasses to show when each is the right choice.