          self._config_file = self._get_config_file()
          self.backend = self._get_backend()
  
      @classmethod
      def _get_config_file(cls):
          """ Obtain the location of the main Faceswap configuration file.
  
          Returns
          -------
          str
 
</s> remove     def __init__(self):
 </s> add     def __init__(self) -> None: </s> remove def get_backend():
 </s> add def get_backend() -> ValidBackends: </s> remove def get_tf_version():
 </s> add def get_tf_version() -> float: </s> remove     def _get_backend(self):
 </s> add     def _get_backend(self) -> ValidBackends:
    def _get_config_file(cls) -> str:
          self._config_file = self._get_config_file()
          self.backend = self._get_backend()
  
      @classmethod
    def _get_config_file(cls) -> str:
          """ Obtain the location of the main Faceswap configuration file.
  
          Returns
          -------
          str
keep keep keep keep replace keep keep keep keep keep
 lib.Utils - add DPI detector 
lib/utils.py