code: def _read_op_list(file):
      op_list = op_def_pb2.OpList()  # pylint: disable=no-member
      content = _read(file)
      google.protobuf.text_format.Merge(content, op_list)
      return op_list
  
imports: import json
  import logging
  import os
  import google.protobuf
  from tensorflow.core.framework import api_def_pb2
  from tensorflow.core.framework import op_def_pb2
  from tensorflow.core.framework import types_pb2
label_desc: Use image node_id 6 for calling a global function with example usage: _read_op_list(file) and returns: op_list