code: def add_etype_id(
      df: Union[dask_cudf.DataFrame, cudf.DataFrame], etype_id: int
  ):
      df["etp"] = np.int32(etype_id)
      return df
  
file_path: cugraph/python/cugraph-dgl/cugraph_dgl/dataloading/utils/extract_graph_helpers.py
imports: from __future__ import annotations
  from typing import Tuple, Dict, Union
  import cugraph
  import cudf
  import dask_cudf
  import numpy
label_desc: Use image node_id 3 for calling a global function with example usage: add_etype_id(df, etype_id) and returns: df