code: def _run(self, input_sequence):  # type: ignore
      if not isinstance(input_sequence, list):
          raise TypeError(
              f"input_sequence must be a list not {type(input_sequence)}."
          )
      return (np.array(len(input_sequence), dtype=np.int64),)
  
imports: import numpy
  from onnx.reference.op_run import OpRun
label_desc: Use image node_id 1 for calling the SequenceLength obj's underlying member method code with example usage: obj._run(input_sequence) and returns: np