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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 template_sphere_shell(outer_radius, inner_radius=0):
 r""" This method generates an image array of a sphere-shell. It is useful for passing to Cubic networks as a ``template`` to make spherical shaped networks. Parameters outer_radius : int Number of nodes in the outer radius of the sphere. inner_radius : int Number of nodes in the inner radius of the shell. a value of 0 will result in a solid sphere. Returns ------- A Numpy array containing 1's to demarcate the sphere-shell, and 0's elsewhere. """

    img = _template_sphere_disc(dim=3, outer_radius=outer_radius,
                                inner_radius=inner_radius)
    return img