def _any_weight_initialized(keras_model):
  """Check if any weights has been initialized in the Keras model.

  Args:
    keras_model: An instance of compiled keras model.

  Returns:
    boolean, True if at least one weight has been initialized, else False.
    Currently keras initialize all weights at get_session().
  """
  if keras_model is None:
    return False
  for layer in keras_model.layers:
    for weight in layer.weights:
      if hasattr(weight, '_keras_initialized'):
        return True
  return False