code: def set_default_region(self, region):
          
          region = _convert_to_charp(region)
          self._set_default_region_func(self.alpr_pointer, region)
docs: This sets the default region for detecting license plates. For example,
          setting region to "md" for Maryland or "fr" for France.
  
          :param region: A unicode/ascii string (Python 2/3) or bytes array (Python 3)
          :return: None