code: def compile_sgf(in_path, optimize=True, model=None):
      
  
      if model is None:
          model = DeviceModel()
  
      parser = SensorGraphFileParser()
      parser.parse_file(in_path)
      parser.compile(model)
  
      if optimize:
          opt = SensorGraphOptimizer()
          opt.optimize(parser.sensor_graph, model=model)
  
      return parser.sensor_graph
docs: Compile and optionally optimize an SGF file.
  
      Args:
          in_path (str): The input path to the sgf file to compile.
          optimize (bool): Whether to optimize the compiled result,
              defaults to True if not passed.
          model (DeviceModel): Optional device model if we are
              compiling for a nonstandard device.  Normally you should
              leave this blank.
  
      Returns:
          SensorGraph: The compiled sensorgraph object