Maybe some methods from the Complex class could be moved to the Number class?

I think, that something like the ring structure (probably even a commutative ring) is expected from the number classes in the Python.  I.e. there should be __add__/__sub__/__mul__/__pos__/__neg__/__pow__/etc.  But not __truediv__/__floordiv__.

Even simpler idea: move the __eq__ method to the Number class.

Then it would be impossible to instantiate a Number.