code: def rnn_factory(rnn_type, **kwargs):
      """rnn factory, Use pytorch version when available."""
      no_pack_padded_seq = False
      if rnn_type == "SRU":
          # SRU doesn't support PackedSequence.
          no_pack_padded_seq = True
          rnn = onmt.modules.sru.SRU(batch_first=True, **kwargs)
      else:
          rnn = getattr(nn, rnn_type)(batch_first=True, **kwargs)
      return rnn, no_pack_padded_seq
  
label_desc: Use image node_id 1 for calling a global function with example usage: rnn_factory(rnn_type) and returns: rnn,  no_pack_padded_seq