code: def test_wrong_data_format():
      Frame(32, 16, data_format="wrong_string")
  
file_path: kapre/tests/test_signal.py
imports: import pytest
  import numpy
  import tensorflow
  import librosa
  from kapre import Frame, Energy, MuLawEncoding, MuLawDecoding, LogmelToMFCC
  from kapre.backend import _CH_FIRST_STR, _CH_LAST_STR, _CH_DEFAULT_STR
  from utils import get_audio, save_load_compare
label_desc: Use image node_id 5 for calling a global function with example usage: test_wrong_data_format() without return types