python-3.x - 在方法“Solver_AddConstraint”中，类型为“operations_research::Constraint *const”的参数 2

Question

我正在使用以下代码添加约束，但得到 TypeError：在方法“Solver_AddConstraint”中，类型为“operations_research::Constraint *const”的参数 2。

def distance_callback(from_index, to_index):
    """Returns the distance between the two nodes."""
    # Convert from routing variable Index to distance matrix NodeIndex.
    from_node = manager.IndexToNode(from_index)
    to_node = manager.IndexToNode(to_index)
    #return distance_matrix[from_node][to_node]
    return multiply_with_mat[from_node][to_node]

transit_callback_index = routing.RegisterTransitCallback(distance_callback)
....
second_cond = distance_value != 1000000.0
solver.Add(second_cond * transit_callback_index != 0)

你能帮我解决这个问题吗？

标签： python-3.xor-tools