code: def add_nodes_from(
      self, nodes_for_adding: Iterable[NodeKey], **attr
  ) -> None:
      if self._N != 0:
          raise NotImplementedError(
              "add_nodes_from is not implemented for graph that already has nodes."
          )
      G = self.to_networkx_class()()
      G.add_nodes_from(nodes_for_adding, **attr)
      G = nxcg.from_networkx(G, preserve_node_attrs=True)
      self._become(G)
  
imports: from __future__ import annotations
  import operator
  from copy import deepcopy
  from typing import TYPE_CHECKING
  import cupy
  import networkx
  import numpy
  import pylibcugraph
  import nx_cugraph
  from ..utils import index_dtype
label_desc: Use image node_id 18 for calling the Graph obj's underlying member method code with example usage: obj.add_nodes_from(nodes_for_adding) without return types