      >>> from lib.utils import set_backend
      >>> set_backend("nvidia")
      """
      global _FS_BACKEND  # pylint:disable=global-statement
      backend = cast(ValidBackends, backend.lower())
      _FS_BACKEND = backend
  
  
  def get_tf_version() -> Tuple[int, int]:
      """ Obtain the major. minor version of currently installed Tensorflow.
 
</s> remove def get_tf_version() -> Tuple[int, int]:
 </s> add def get_tf_version() -> tuple[int, int]: </s> remove     (2, 9)
 </s> add     (2, 10) </s> remove     def __init__(self, model_filename: Union[str, List[str]], git_model_id: int) -> None:
 </s> add     def __init__(self, model_filename: str | list[str], git_model_id: int) -> None: </s> remove             fs_backend = cast(ValidBackends, os.environ["FACESWAP_BACKEND"].lower())
            assert fs_backend in get_args(ValidBackends), (
                f"Faceswap backend must be one of {get_args(ValidBackends)}")
 </s> add             fs_backend = T.cast(ValidBackends, os.environ["FACESWAP_BACKEND"].lower())
            assert fs_backend in T.get_args(ValidBackends), (
                f"Faceswap backend must be one of {T.get_args(ValidBackends)}") </s> remove     def get_detector(name: str, disable_logging: bool = False) -> Type["Detector"]:
 </s> add     def get_detector(name: str, disable_logging: bool = False) -> type[Detector]:
    backend = T.cast(ValidBackends, backend.lower())
      >>> from lib.utils import set_backend
      >>> set_backend("nvidia")
      """
      global _FS_BACKEND  # pylint:disable=global-statement
    backend = T.cast(ValidBackends, backend.lower())
      _FS_BACKEND = backend
  
  
  def get_tf_version() -> Tuple[int, int]:
      """ Obtain the major. minor version of currently installed Tensorflow.
keep keep keep keep replace keep keep keep keep keep
 Rebase code (#1326)

* Remove tensorflow_probability requirement

* setup.py - fix progress bars

* requirements.txt: Remove pre python 3.9 packages

* update apple requirements.txt

* update INSTALL.md

* Remove python<3.9 code

* setup.py - fix Windows Installer

* typing: python3.9 compliant

* Update pytest and readthedocs python versions

* typing fixes

* Python Version updates
  - Reduce max version to 3.10
  - Default to 3.10 in installers
  - Remove incompatible 3.11 tests

* Update dependencies

* Downgrade imageio dep for Windows

* typing: merge optional unions and fixes

* Updates
  - min python version 3.10
  - typing to python 3.10 spec
  - remove pre-tf2.10 code
  - Add conda tests

* train: re-enable optimizer saving

* Update dockerfiles

* Update setup.py
  - Apple Conda deps to setup.py
  - Better Cuda + dependency handling

* bugfix: Patch logging to prevent Autograph errors

* Update dockerfiles

* Setup.py - Setup.py - stdout to utf-8

* Add more OSes to github Actions

* suppress mac-os end to end test 
lib/utils.py