code: def _compute_mfcc_pure_python(self):
          
          self.log(u"Computing MFCCs using pure Python code...")
          try:
              self.__mfcc = MFCC(
                  rconf=self.rconf,
                  logger=self.logger
              ).compute_from_data(
                  self.audio_file.audio_samples,
                  self.audio_file.audio_sample_rate
              ).transpose()
              self.log(u"Computing MFCCs using pure Python code... done")
              return (True, None)
          except Exception as exc:
              self.log_exc(u"An unexpected error occurred while running pure Python code", exc, False, None)
          return (False, None)
docs: Compute MFCCs using the pure Python code.