code: def csv_filename():
      """Yields a csv filename for holding temporary data."""
      with tempfile.TemporaryDirectory() as tmpdir:
          csv_filename = os.path.join(
              tmpdir, uuid.uuid4().hex[:10].upper() + ".csv"
          )
          yield csv_filename
  
imports: import contextlib
  import os
  import tempfile
  import time
  import uuid
  from unittest import mock
  import pytest
  from ludwig.constants import BATCH_SIZE, COMBINER, EPOCHS, HYPEROPT, INPUT_FEATURES, NAME, OUTPUT_FEATURES, TRAINER, TYPE
  from ludwig.hyperopt.run import hyperopt
  from tests.integration_tests.utils import category_feature, generate_data, text_feature
label_desc: Use image node_id 5 for calling a global function with example usage: csv_filename() without return types