code: def load_graph_v1(filename, idx_list=None):
      """ "Internal functions for loading DGLGraphs (V0)."""
      if idx_list is None:
          idx_list = []
      assert isinstance(idx_list, list)
      metadata = _CAPI_LoadGraphFiles_V1(filename, idx_list, False)
      label_dict = {}
      for k, v in metadata.labels.items():
          label_dict[k] = F.zerocopy_from_dgl_ndarray(v)
      return [
          gdata.get_graph() for gdata in metadata.graph_data
      ], label_dict
  
imports: from __future__ import absolute_import
  import os
  from ..None import backend
  from .._ffi.function import _init_api
  from .._ffi.object import ObjectBase, register_object
  from ..base import dgl_warning, DGLError
  from ..heterograph import DGLGraph
  from .heterograph_serialize import save_heterographs
label_desc: Use image node_id 6 for calling a global function with example usage: load_graph_v1(filename, idx_list) and returns: unknown,  label_dict