message: raw_input() was removed in Python 3
diff: @@ -19,9 +19,9 @@ from __future__ import division
  from __future__ import print_function
  from collections import defaultdict
  -import sys
  import numpy as np
  +import six
  from tensorflow.python.util.tf_export import tf_export
  @@ -160,13 +160,11 @@ def ask_to_proceed_with_overwrite(filepath):
  Returns:
  True if we can proceed with overwrite, False otherwise.
  """
  - get_input = input
  - if sys.version_info[:2] <= (2, 7):
  - get_input = raw_input
  - overwrite = get_input('[WARNING] %s already exists - overwrite? '
  - '[y/n]' % (filepath))
  - while overwrite not in ['y', 'n']:
  - overwrite = get_input('Enter "y" (overwrite) or "n" (cancel).')
  + overwrite = six.moves.input('[WARNING] %s already exists - overwrite? '
  + '[y/n]' % (filepath)).strip().lower()
  + while overwrite not in ('y', 'n'):
  + overwrite = six.moves.input('Enter "y" (overwrite) or "n" '
  + '(cancel).').strip().lower()
  if overwrite == 'n':
  return False
  print('[TIP] Next time specify overwrite=True!')
  