issubclass() not as documented

[nilamo]

To be fair to Python, though, the interactive docs don't have this ambiguous phrasing, and indicate that it returns a bool (though, there's no mention of any exceptions ever being possible...)

>>> help(issubclass)
Help on built-in function issubclass in module builtins:

issubclass(cls, class_or_tuple, /)
    Return whether 'cls' is a derived from another class or is the same class.

    A tuple, as in ``issubclass(x, (A, B, ...))``, may be given as the target to
    check against. This is equivalent to ``issubclass(x, A) or issubclass(x, B)
    or ...`` etc.