code: def make_dummy_json(
      n_utts=10,
      ilen_range=(100, 300),
      olen_range=(10, 300),
      idim=83,
      odim=52,
      num_inputs=1,
  ):
      ilens = np.random.randint(ilen_range[0], ilen_range[1], n_utts)
      olens = np.random.randint(olen_range[0], olen_range[1], n_utts)
      dummy_json = {}
      for idx in range(n_utts):
          input = []
          for input_idx in range(num_inputs):
              input += [{"shape": [ilens[idx], idim]}]
          output = [{"shape": [olens[idx], odim]}]
          dummy_json["utt_%d" % idx] = {
              "input": input,
              "output": output,
          }
      return dummy_json
  
label_desc: Use image node_id 1 for calling a global function with example usage: make_dummy_json(n_utts, ilen_range, olen_range, idim, odim, num_inputs) and returns: dummy_json