Merge branch 'v3-default-factory-for-dictionaries' into 'v3'

Use a default_factory for dict default values

Closes #750 and #751

See merge request openflexure/openflexure-microscope-server!561

src/openflexure_microscope_server/things/stage/__init__.py

@@ -147,7 +147,7 @@ class BaseStage(lt.Thing):
         return self._apply_axis_direction(self._hardware_position)
 
     backlash_steps: dict[str, int] = lt.setting(
-        default={"x": 200, "y": 200, "z": 200}, readonly=True
+        default_factory=lambda: {"x": 200, "y": 200, "z": 200}, readonly=True
     )
     """The number of steps to elimate backlash. The sign sets the direction.
 
@@ -161,7 +161,7 @@ class BaseStage(lt.Thing):
     """Whether the stage is in motion."""
 
     axis_inverted: dict[str, bool] = lt.setting(
-        default={"x": False, "y": False, "z": False}, readonly=True
+        default_factory=lambda: {"x": False, "y": False, "z": False}, readonly=True
     )
     """Used to convert coordinates between the program frame and the hardware frame."""
 

src/openflexure_microscope_server/things/stage/dummy.py

@@ -77,7 +77,7 @@ class DummyStage(BaseStage):
             self._move_thread.join()
 
     axis_inverted: dict[str, bool] = lt.setting(
-        default={"x": True, "y": False, "z": False}, readonly=True
+        default_factory=lambda: {"x": True, "y": False, "z": False}, readonly=True
     )
     """Used to convert coordinates between the program frame and the hardware frame."""
 

src/openflexure_microscope_server/things/stage/sangaboard.py

@@ -76,7 +76,7 @@ class SangaboardThing(BaseStage):
             self._sangaboard.close()
 
     axis_inverted: dict[str, bool] = lt.setting(
-        default={"x": True, "y": False, "z": True}, readonly=True
+        default_factory=lambda: {"x": True, "y": False, "z": True}, readonly=True
     )
     """Used to convert coordinates between the program frame and the hardware frame."""