tensorflow/models · error · ValueError

The ParamsDict has been locked. No change is allowed.

Error message

The ParamsDict has been locked. No change is allowed.

What it means

Error "The ParamsDict has been locked. No change is allowed." thrown in tensorflow/models.

Source

Thrown at official/modeling/hyperparams/params_dict.py:119

    """Sets the value of the existing key.

    Note that this does not allow directly defining a new key. Use the
    `override` method with `is_strict=False` instead.

    Args:
      k: the key string.
      v: the value to be used to set the key `k`.

    Raises:
      KeyError: if k is not defined in the ParamsDict.
    """
    if k not in ParamsDict.RESERVED_ATTR:
      if k not in self.__dict__.keys():
        raise KeyError('The key `%{}` does not exist. '
                       'To extend the existing keys, use '
                       '`override` with `is_strict` = True.'.format(k))
      if self._locked:
        raise ValueError('The ParamsDict has been locked. '
                         'No change is allowed.')
    self._set(k, v)

  def __getattr__(self, k):
    """Gets the value of the existing key.

    Args:
      k: the key string.

    Returns:
      the value of the key.

    Raises:
      AttributeError: if k is not defined in the ParamsDict.
    """
    if k not in self.__dict__.keys():
      raise AttributeError('The key `{}` does not exist. '.format(k))
    return self.__dict__[k]

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/modeling/hyperparams/params_dict.py:119 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/d8f7ba97960ee20c. Report an issue: GitHub.