code: def type(self):
      if hasattr(self.layer, "op_name"):
          return self.layer.op_name
      elif self.layer.is_input:
          return "DataInput"
      else:
          raise NotImplementedError()
  
file_path: MMdnn/mmdnn/conversion/cntk/cntk_graph.py
imports: import cntk
  from mmdnn.conversion.common.DataStructure.graph import GraphNode, Graph
label_desc: Use image node_id 3 for calling the CntkGraphNode obj's underlying member method code with example usage: obj.type() and returns: self, str