code: def Load(self):
      
      try:
        for event in self._LoadInternal():
          yield event
      except tf.errors.OpError:
        if not tf.io.gfile.exists(self._directory):
          raise DirectoryDeletedError(
              'Directory %s has been permanently deleted' % self._directory)
docs: Loads new values.
  
      The watcher will load from one path at a time; as soon as that path stops
      yielding events, it will move on to the next path. We assume that old paths
      are never modified after a newer path has been written. As a result, Load()
      can be called multiple times in a row without losing events that have not
      been yielded yet. In other words, we guarantee that every event will be
      yielded exactly once.
  
      Yields:
        All values that have not been yielded yet.
  
      Raises:
        DirectoryDeletedError: If the directory has been permanently deleted
          (as opposed to being temporarily unavailable).