How to check if an object is an instance of a namedtuple?

Question

How do I check if an object is an instance of a Named tuple?

Answer 1

I use

isinstance(x, tuple) and isinstance(x.__dict__, collections.abc.Mapping)

which to me appears to best reflect the dictionary aspect of the nature of named tuples. It appears robust against some conceivable future changes too and might also work with many third-party namedtuple-ish classes, if such things happen to exist.