          else:
              handletype = cast(Dict[str, Dict[str, str]],
                                self._contexts)[command][action]
          logger.debug(handletype)
          self._handletype = cast(_HANDLETYPE, handletype)
  
      def _open(self) -> Optional[IO]:
          """ Open a file. """
          logger.debug("Popping Open browser")
          return filedialog.askopenfile(**self._kwargs)  # type: ignore
 
</s> remove     def _open(self) -> Optional[IO]:
 </s> add     def _open(self) -> T.IO | None: </s> remove             handletype = cast(Dict[str, Dict[str, str]],
                              self._contexts)[command][action]
 </s> add             handletype = T.cast(dict[str, dict[str, str]],
                                self._contexts)[command][action] </s> remove     def _save(self) -> Optional[IO]:
 </s> add     def _save(self) -> T.IO | None: </s> remove             handletype = cast(Dict[str, Dict[str, Dict[str, str]]],
                              self._contexts)[command][variable][action]
 </s> add             handletype = T.cast(dict[str, dict[str, dict[str, str]]],
                                self._contexts)[command][variable][action] </s> remove     def _filename_multi(self) -> Tuple[str, ...]:
 </s> add     def _filename_multi(self) -> tuple[str, ...]:
        self._handletype = T.cast(_HANDLETYPE, handletype)
          else:
              handletype = cast(Dict[str, Dict[str, str]],
                                self._contexts)[command][action]
          logger.debug(handletype)
        self._handletype = T.cast(_HANDLETYPE, handletype)
  
      def _open(self) -> Optional[IO]:
          """ Open a file. """
          logger.debug("Popping Open browser")
          return filedialog.askopenfile(**self._kwargs)  # type: ignore
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/gui/utils/file_handler.py