tensorflow/models · error · AttributeError

The key `{}` is reserved. No change is allowes.

Error message

The key `{}` is reserved. No change is allowes. 

What it means

Error "The key `{}` is reserved. No change is allowes. " thrown in tensorflow/models.

Source

Thrown at official/modeling/hyperparams/params_dict.py:158

    """Implements the membership test operator."""
    return key in self.__dict__

  def get(self, key, value=None):
    """Accesses through built-in dictionary get method."""
    return self.__dict__.get(key, value)

  def __delattr__(self, k):
    """Deletes the key and removes its values.

    Args:
      k: the key string.

    Raises:
      AttributeError: if k is reserverd or not defined in the ParamsDict.
      ValueError: if the ParamsDict instance has been locked.
    """
    if k in ParamsDict.RESERVED_ATTR:
      raise AttributeError(
          'The key `{}` is reserved. No change is allowes. '.format(k))
    if k not in self.__dict__.keys():
      raise AttributeError('The key `{}` does not exist. '.format(k))
    if self._locked:
      raise ValueError('The ParamsDict has been locked. No change is allowed.')
    del self.__dict__[k]

  def override(self, override_params, is_strict=True):
    """Override the ParamsDict with a set of given params.

    Args:
      override_params: a dict or a ParamsDict specifying the parameters to be
        overridden.
      is_strict: a boolean specifying whether override is strict or not. If
        True, keys in `override_params` must be present in the ParamsDict. If
        False, keys in `override_params` can be different from what is currently
        defined in the ParamsDict. In this case, the ParamsDict will be extended
        to include the new keys.

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/modeling/hyperparams/params_dict.py:158 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/fbd23eb951358714. Report an issue: GitHub.