Mark Dickinson added the comment: What happens if `self.numerator / self.denominator` returns another `Rational` instance? If I create `MyRational` and `MyInteger` classes, such that the quotient of two `MyInteger` instances is a `MyRational` instance and the numerator and denominator of a `MyRational` instance are both `MyInteger` instances, this suggestion would lead to an infinite recursion. OTOH, I agree that *something* needs to be fixed here, since having `__float__` return a `MyRational` instance is definitely wrong.
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