code: def get_op_data_type(self, op_def):
      arg = self.get_op_def_arg(
          op_def, MaceKeyword.mace_op_data_type_str
      )
      if arg is None:
          return self.default_data_type
      else:
          return arg.i
  
imports: from py_proto import mace_pb2
  from utils.config_parser import ModelKeys
  from utils.util import mace_check
  from transform.base_converter import MaceKeyword
  from transform.base_converter import MaceOp
label_desc: Use image node_id 4 for calling the ScratchComputer obj's underlying member method code with example usage: obj.get_op_data_type(op_def) and returns: self, arg