code: def main(cmd=None):
      r"""ASR Transducer training.
  
      Example:
  
          % python asr_transducer_train.py asr --print_config \
                  --optim adadelta > conf/train_asr.yaml
          % python asr_transducer_train.py \
                  --config conf/tuning/transducer/train_rnn_transducer.yaml
      """
      ASRTransducerTask.main(cmd=cmd)
  
label_desc: Use image node_id 2 for calling a global function with example usage: main(cmd) without return types