message: long was removed in Python 3
diff: @@ -31,6 +31,7 @@ import warnings
  import numpy as np
  +from six import integer_types
  from tensorflow.contrib.saved_model.python.saved_model import reader
  from tensorflow.contrib.saved_model.python.saved_model import signature_def_utils
  from tensorflow.core.example import example_pb2
  @@ -440,7 +441,7 @@ def _create_example_string(example_dict):
  elif isinstance(feature_list[0], str):
  example.features.feature[feature_name].bytes_list.value.extend(
  feature_list)
  - elif isinstance(feature_list[0], (int, long)):
  + elif isinstance(feature_list[0], integer_types):
  example.features.feature[feature_name].int64_list.value.extend(
  feature_list)
  else:
  