code: def choices(self):
          
          if self._choices:
              return self._choices
          for n in os.listdir(self._voicedir):
              if len(n) == 1 and os.path.isdir(os.path.join(self._voicedir, n)):
                  self._choices.append(n)
          return self._choices
docs: Available choices for characters to be generated.