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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 skip_connections_distance(list_a, list_b):
 """The distance between the skip-connections of two neural networks."""

    distance_matrix = np.zeros((len(list_a), len(list_b)))
    for i, a in enumerate(list_a):
        for j, b in enumerate(list_b):
            distance_matrix[i][j] = skip_connection_distance(a, b)
    return distance_matrix[linear_sum_assignment(distance_matrix)].sum() + abs(
        len(list_a) - len(list_b)
    )