code: def __load_paths(self, base_path=None):
          
          if base_path is None:
              base_path = dirname(dirname(dirname(__file__)))
          if not base_path.endswith(sep):
              base_path += sep
          self.__paths = {
              'base': base_path,
              'cert': base_path + 'certs' + sep,
              'lib': base_path + 'lib' + sep,
              'extlib': base_path + 'extlib' + sep,
          }
docs: Set the paths of the different folders