      ".avi", ".flv", ".mkv", ".mov", ".mp4", ".mpeg", ".mpg", ".webm", ".wmv",
      ".ts", ".vob"]
  _TF_VERS = None
  
  
  class _Backend():  # pylint:disable=too-few-public-methods
      """ Return the backend from config/.faceswap of from the `FACESWAP_BACKEND` Environment
      Variable.
  
 
</s> remove     def __init__(self):
 </s> add     def __init__(self) -> None: </s> remove     def _get_backend(self):
 </s> add     def _get_backend(self) -> ValidBackends: </s> remove def get_folder(path, make_folder=True):
 </s> add def get_folder(path: str, make_folder: bool = True) -> str: </s> remove     _FS_BACKEND = backend.lower()
 </s> add     backend = cast(ValidBackends, backend.lower())
    _FS_BACKEND = backend
ValidBackends = Literal["amd", "nvidia", "cpu", "apple_silicon"]
      ".avi", ".flv", ".mkv", ".mov", ".mp4", ".mpeg", ".mpg", ".webm", ".wmv",
      ".ts", ".vob"]
  _TF_VERS = None
ValidBackends = Literal["amd", "nvidia", "cpu", "apple_silicon"]
  
  
  class _Backend():  # pylint:disable=too-few-public-methods
      """ Return the backend from config/.faceswap of from the `FACESWAP_BACKEND` Environment
      Variable.
  
keep keep add keep keep keep keep keep keep
 lib.Utils - add DPI detector 
lib/utils.py