def get_dummy_encoder_output(encoder_out_shape=(100, 80, 5)):
    """
    This only provides an example to generate dummy encoder output
    """
    (T, B, D) = encoder_out_shape
    encoder_out = {}

    encoder_out["encoder_out"] = torch.from_numpy(
        np.random.randn(*encoder_out_shape).astype(np.float32)
    )
    seq_lengths = torch.from_numpy(np.random.randint(low=1, high=T, size=B))
    # some dummy mask
    encoder_out["encoder_padding_mask"] = torch.arange(T).view(1, T).expand(
        B, -1
    ) >= seq_lengths.view(B, 1).expand(-1, T)
    encoder_out["encoder_padding_mask"].t_()

    # encoer_padding_mask is (T, B) tensor, with (t, b)-th element indicate
    # whether encoder_out[t, b] is valid (=0) or not (=1)
    return encoder_out
This only provides an example to generate dummy encoder output
tests/speech_recognition/asr_test_base.py