code: def get_version_info_str(self, key_name='ver_sw_release'):
          
          version = self.get_version_info(key_name)
          if not version is None and version[3] >= 64:
              type_str = ''
              if version[3] < 128: type_str = ' (alpha)'
              elif version[3] < 192: type_str = ' (beta)'
              elif version[3] < 255: type_str = ' (RC)'
              return 'v{}.{}.{}{}'.format(version[0], version[1], version[2], type_str)
          return None
docs: get version information in the form 'v1.2.3 (RC)', or None if version
          tag either not found or it's a development version