tensorflow/models · error

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/nlp/tools/tokenization.py:92

  if is_bad_config:
    raise ValueError(
        "You passed in `--do_lower_case=%s` with `--init_checkpoint=%s`. "
        "However, `%s` seems to be a %s model, so you "
        "should pass in `--do_lower_case=%s` so that the fine-tuning matches "
        "how the model was pre-training. If this error is wrong, please "
        "just comment out this check." %
        (actual_flag, init_checkpoint, model_name, case_name, opposite_flag))  # pyrefly: ignore[unbound-name]


def convert_to_unicode(text):
  """Converts `text` to Unicode (if it's not already), assuming utf-8 input."""
  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.decode("utf-8", "ignore")  # pyrefly: ignore[missing-attribute]
    elif isinstance(text, unicode):  # pyrefly: ignore[unknown-name]
      return text
    else:
      raise ValueError("Unsupported string type: %s" % (type(text)))
  else:
    raise ValueError("Not running on Python2 or Python 3?")


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):

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/nlp/tools/tokenization.py:92 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/7211cd45b1fe977f. Report an issue: GitHub.