def METHOD_NAME(csv_float):
    dataset = ESPnetDataset(
        path_name_type_list=[(csv_float, "data8", "csv_float")],
        preprocess=preprocess,
    )
    _, data = dataset["a"]
    assert all((data["data8"]) == np.array([1.4, 3.4], dtype=np.float32))
    _, data = dataset["b"]
    assert all((data["data8"]) == np.array([0.9, 9.3], dtype=np.float32))