Mark Dickinson added the comment: I don't think this is a good idea. Remember that Python classes are themselves mutable objects, so if a library that you happen to import creates a "Point" namedtuple with fields "x" and "y" and class-level modifications (extra attributes, patched-in methods), any namedtuple you created with fields "x" and "y" would automatically pick up those modifications. (And conversely, by modifying *your* class, you might adversely affect the behaviour of the library's class.)
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