<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def separation(self, other):
 r"""Separation to another pixel coordinate. This is the two-dimensional cartesian separation :math:`d` with .. math:: d = \sqrt{(x_1 - x_2) ^ 2 + (y_1 - y_2) ^ 2} Parameters other : `PixCoord` Other pixel coordinate Returns ------- separation : `numpy.array` Separation in pixels """

        dx = other.x - self.x
        dy = other.y - self.y
        return np.hypot(dx, dy)