message: Make the os.makedirs compatable with Python2
diff: @@ -125,7 +125,7 @@ class MatchingFilesDatasetTest(test_base.DatasetTestBase):
  for j in range(depth):
  new_base = os.path.join(self.tmp_dir, str(i),
  *[str(dir_name) for dir_name in range(j)])
  - os.makedirs(new_base, exist_ok=True)
  + os.makedirs(new_base)
  for f in ['a.txt', 'b.py', 'c.pyc']:
  filename = os.path.join(new_base, f)
  filenames.append(filename)
  