      def __init__(self,
                   plugin: ModelBase,
                   model_dir: str,
                   is_predict: bool,
                   save_optimizer: Literal["never", "always", "exit"]) -> None:
          self._plugin = plugin
          self._is_predict = is_predict
          self._model_dir = model_dir
          self._save_optimizer = save_optimizer
          self._history: T.List[T.List[float]] = [[], []]  # Loss histories per save iteration
 
</s> remove         self._history: T.List[T.List[float]] = [[], []]  # Loss histories per save iteration
 </s> add         self._history: list[list[float]] = [[], []]  # Loss histories per save iteration </s> remove     def _get_output_file(self, model_dir: str) -> T.Tuple[str, str]:
 </s> add     def _get_output_file(self, model_dir: str) -> tuple[str, str]: </s> remove     def _should_backup(self, save_averages: T.List[float]) -> bool:
 </s> add     def _should_backup(self, save_averages: list[float]) -> bool: </s> remove                  exclude_gpus: T.Optional[T.List[int]],
 </s> add                  exclude_gpus: list[int] | None, </s> remove         self._state: Dict[str, Any] = {}
 </s> add         self._state: dict[str, T.Any] = {}
                 save_optimizer: T.Literal["never", "always", "exit"]) -> None:
      def __init__(self,
                   plugin: ModelBase,
                   model_dir: str,
                   is_predict: bool,
                 save_optimizer: T.Literal["never", "always", "exit"]) -> None:
          self._plugin = plugin
          self._is_predict = is_predict
          self._model_dir = model_dir
          self._save_optimizer = save_optimizer
          self._history: T.List[T.List[float]] = [[], []]  # Loss histories per save iteration
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 
plugins/train/model/_base/io.py