3.4 Using tuples and named tuples
Since Python tuples are immutable objects, they’re another excellent example of objects suitable for functional programming. A Python tuple has very few methods, so almost everything is done using prefix syntax. There are a number of use cases for tuples, particularly when working with list-of-tuple, tuple-of-tuple, and generator-of-tuple constructs.
The typing.NamedTuple class adds an essential feature to a tuple: names to use instead of cryptic index numbers. We can exploit named tuples to create objects that are accretions of data. This allows us to write pure functions based on stateless objects, yet keep data bound into tidy object-like packages. The collections.namedtuple() can also be used to define an immutable class of objects. This lacks a mechanism for providing type hints, making it less desirable than the typing.NamedTuple class.
The decision to use a tuple or typing.NamedTuple object is entirely a matter of convenience. As an example...
