code: def featurize(self, audio_clip, overwrite=False, save_feature_as_csvfile=False):
          
          return spectrogram_from_file(
              audio_clip, step=self.step, window=self.window,
              max_freq=self.max_freq, overwrite=overwrite,
              save_feature_as_csvfile=save_feature_as_csvfile)
docs: For a given audio clip, calculate the log of its Fourier Transform
          Params:
              audio_clip(str): Path to the audio clip