Distance between the center of this region and another.

        Parameters
        ----------
        other : one region, or array-like
            Either another region, or the center of another region.

def distance(self, other):
        """
        Distance between the center of this region and another.

        Parameters
        ----------
        other : one region, or array-like
            Either another region, or the center of another region.
        """
        from numpy.linalg import norm
        if isinstance(other, one):
            other = other.center
        return norm(self.center - asarray(other), ord=2)