How to use the libpysal.weights.W function in libpysal

raise AttributeError("GeoDataFrame or spatial weights must be given.")

    if k > 1:
        id_order = first_order.id_order
        w = first_order.sparse
        wk = sum(map(lambda x: w ** x, range(2, k + 1)))
        rk, ck = wk.nonzero()
        sk = set(zip(rk, ck))
        sk = set([(i, j) for i, j in sk if i != j])
        d = dict([(i, []) for i in id_order])
        for pair in sk:
            k, v = pair
            k = id_order[k]
            v = id_order[v]
            d[k].append(v)
        return libpysal.weights.W(neighbors=d, silence_warnings=silent)
    return first_order