  class PreviewBuffer():
      """ A thread safe class for holding preview images """
      def __init__(self) -> None:
          logger.debug("Initializing: %s", self.__class__.__name__)
          self._images: Dict[str, "np.ndarray"] = {}
          self._lock = Lock()
          self._updated = Event()
          logger.debug("Initialized: %s", self.__class__.__name__)
  
      @property
 
</s> remove TriggerType = Dict[Literal["toggle_mask", "refresh", "save", "quit", "shutdown"], Event]
TriggerKeysType = Literal["m", "r", "s", "enter"]
TriggerNamesType = Literal["toggle_mask", "refresh", "save", "quit"]
 </s> add TriggerType = dict[T.Literal["toggle_mask", "refresh", "save", "quit", "shutdown"], Event]
TriggerKeysType = T.Literal["m", "r", "s", "enter"]
TriggerNamesType = T.Literal["toggle_mask", "refresh", "save", "quit"] </s> remove         self._data: Dict[int, _CacheData] = {}
        self._carry_over: Dict[int, EventData] = {}
        self._loss_labels: List[str] = []
 </s> add         self._data: dict[int, _CacheData] = {}
        self._carry_over: dict[int, EventData] = {}
        self._loss_labels: list[str] = [] </s> remove         self._loss_functions: List[compile_utils.LossesContainer] = []
        self._loss_weights: List[float] = []
        self._mask_channels: List[int] = []
 </s> add         self._loss_functions: list[compile_utils.LossesContainer] = []
        self._loss_weights: list[float] = []
        self._mask_channels: list[int] = [] </s> remove         self.queues: Dict[str, EventQueue] = {}
 </s> add         self.queues: dict[str, EventQueue] = {} </s> remove         self._state: Dict[str, Any] = {}
 </s> add         self._state: dict[str, T.Any] = {}
        self._images: dict[str, np.ndarray] = {}
  class PreviewBuffer():
      """ A thread safe class for holding preview images """
      def __init__(self) -> None:
          logger.debug("Initializing: %s", self.__class__.__name__)
        self._images: dict[str, np.ndarray] = {}
          self._lock = Lock()
          self._updated = Event()
          logger.debug("Initialized: %s", self.__class__.__name__)
  
      @property
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/training/preview_cv.py