test_neighbors.py 文件源码

def test_unsupervised_kneighbors(n_samples=20, n_features=5,
                                 n_query_pts=2, n_neighbors=5):
    # Test unsupervised neighbors methods
    X = rng.rand(n_samples, n_features)

    test = rng.rand(n_query_pts, n_features)

    for p in P:
        results_nodist = []
        results = []

        for algorithm in ALGORITHMS:
            neigh = neighbors.NearestNeighbors(n_neighbors=n_neighbors,
                                               algorithm=algorithm,
                                               p=p)
            neigh.fit(X)

            results_nodist.append(neigh.kneighbors(test,
                                                   return_distance=False))
            results.append(neigh.kneighbors(test, return_distance=True))

        for i in range(len(results) - 1):
            assert_array_almost_equal(results_nodist[i], results[i][1])
            assert_array_almost_equal(results[i][0], results[i + 1][0])
            assert_array_almost_equal(results[i][1], results[i + 1][1])