Method _require

orbit/controller.py:569–574

Utility method to raise an error if the given `attribute` is not set.

(self, attribute, for_method)

    return False

  def _require(self, attribute, for_method):
    """Utility method to raise an error if the given `attribute` is not set."""
    if getattr(self, attribute, None) is None:
      raise ValueError(
          f"`{attribute}` is not set. Pass `{attribute}` to "
          f"`Controller.__init__` before calling `{for_method}()`.")

  def _sync_on_async_checkpointing(self):
    """Force to wait for the async checkpoint saving (if any) to finish."""