code: def import_model(model_file):
      
      graph = GraphProto()
  
      # loads model file and returns ONNX protobuf object
      model_proto = onnx.load(model_file)
      sym, params = graph.from_onnx(model_proto.graph)
      return sym, params
docs: Imports the supplied ONNX model file into MXNet symbol and parameters.
  
      Parameters
      ----------
      model_file : ONNX model file name
  
      Returns
      -------
      sym : mx.symbol
          Compatible mxnet symbol
  
      params : dict of str to mx.ndarray
          Dict of converted parameters stored in mx.ndarray format