tensorflow/models · error · ValueError

Unsupported string type: %s

Error message

Unsupported string type: %s

What it means

Error "Unsupported string type: %s" thrown in tensorflow/models.

Source

Thrown at official/legacy/xlnet/preprocess_utils.py:35

import unicodedata

import six

SPIECE_UNDERLINE = '▁'


def printable_text(text):
  """Returns text encoded in a way suitable for print or `tf.logging`."""

  # These functions want `str` for both Python2 and Python3, but in one case
  # it's a Unicode string and in the other it's a byte string.
  if six.PY3:
    if isinstance(text, str):
      return text
    elif isinstance(text, bytes):
      return text.decode('utf-8', 'ignore')
    else:
      raise ValueError('Unsupported string type: %s' % (type(text)))
  elif six.PY2:
    if isinstance(text, str):
      return text
    elif isinstance(text, unicode):  # pylint: disable=undefined-variable
      return text.encode('utf-8')
    else:
      raise ValueError('Unsupported string type: %s' % (type(text)))
  else:
    raise ValueError('Not running on Python2 or Python 3?')


def print_(*args):
  new_args = []
  for arg in args:
    if isinstance(arg, list):
      s = [printable_text(i) for i in arg]
      s = ' '.join(s)
      new_args.append(s)

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/legacy/xlnet/preprocess_utils.py:35 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of tensorflow/models@e006f5f0d5 (2026-08-24). Data as JSON: /api/errors/bb4940c46a2e680d. Report an issue: GitHub.