How much time do you spend on generating the adj maxtrices

[KimRasak]

    def create_adj_mat(self):
        t1 = time()
        adj_mat = sp.dok_matrix((self.n_users + self.n_items, self.n_users + self.n_items), dtype=np.float32)
        adj_mat = adj_mat.tolil()
        R = self.R.tolil()

        adj_mat[:self.n_users, self.n_users:] = R
        adj_mat[self.n_users:, :self.n_users] = R.T
        adj_mat = adj_mat.todok()
        print('already create adjacency matrix', adj_mat.shape, time() - t1)

        t2 = time()

I've waited for a day and the code is still stuck at adj_mat = adj_mat.todok()