code: def _create_csv(self, filename: str, rows: Iterable[Any]) -> None:
      with open(filename, "w") as f:
          cf = csv.writer(f, delimiter=",")
          cf.writerows(rows)
  
imports: import contextlib
  import csv
  import os
  import random
  import tempfile
  import unittest
  from typing import Any, Callable, Dict, Generator, Iterable, List, Type, Union
  from torchrec.datasets.movielens import movielens_20m, movielens_25m
label_desc: Use image node_id 1 for calling the MovieLensTest obj's underlying member method code with example usage: obj._create_csv(filename, rows) without return types