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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def inertia_tensor(self):
 """ The inertia tensor of the source for the rotation around its center of mass. """


        mu = self.moments_central
        a = mu[0, 2]
        b = -mu[1, 1]
        c = mu[2, 0]
        return np.array([[a, b], [b, c]]) * u.pix**2