test_feature_hasher.py 文件源码

def test_feature_hasher_dicts():
    h = FeatureHasher(n_features=16)
    assert_equal("dict", h.input_type)

    raw_X = [{"dada": 42, "tzara": 37}, {"gaga": 17}]
    X1 = FeatureHasher(n_features=16).transform(raw_X)
    gen = (iter(d.items()) for d in raw_X)
    X2 = FeatureHasher(n_features=16, input_type="pair").transform(gen)
    assert_array_equal(X1.toarray(), X2.toarray())