code: def test_make_valid_tf_name(self):
      newname = make_valid_tf_name("$ave/&sound")
      assert newname == "._ave/_sound"
  
file_path: pytorch-tensorboardx/tests/test_record_writer.py
imports: from tensorboardX import SummaryWriter
  import unittest
  from tensorboardX.record_writer import S3RecordWriter, make_valid_tf_name, GCSRecordWriter
  import os
  import boto3
  import shutil
  from moto import mock_s3
label_desc: Use image node_id 2 for calling the RecordWriterTest obj's underlying member method code with example usage: obj.test_make_valid_tf_name() without return types