KeyError: 'SpatialData'

Hi,

I installed napari and napari-spatialdata plugin from the conda-forge repo, via pixi.

Whenever I try to open the spatial data plugin (view or scatter) from the UI, I get this error stack:

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
File ~/Documents/dev/napari/.pixi/envs/default/lib/python3.10/site-packages/app_model/backends/qt/_qaction.py:59, in QCommandAction._on_triggered(self=QMenuItemAction(MenuItem(when=None, group='3_plu...napari spatialdata)'))), alt=None), app='napari'), checked=True)
     55 def _on_triggered(self, checked: bool) -> None:
     56     # execute_command returns a Future, for the sake of eventually being
     57     # asynchronous without breaking the API.  For now, we call result()
     58     # to raise any exceptions.
---> 59     self._app.commands.execute_command(self._command_id).result()
        self._command_id = 'napari-spatialdata:Scatter'
        self = QMenuItemAction(MenuItem(when=None, group='3_plugin_contributions', order=None, command=CommandRule(id='napari-spatialdata:Scatter', title='Scatter', category=None, tooltip=None, status_tip=None, icon=None, icon_visible_in_menu=True, enablement=None, short_title=None, toggled=ToggleRule(condition=None, get_current=functools.partial(<function _get_current_dock_status at 0x16ccca050>, full_name='Scatter (napari spatialdata)'))), alt=None), app='napari')
        self._app = Application('napari')

File ~/Documents/dev/napari/.pixi/envs/default/lib/python3.10/site-packages/app_model/registries/_commands_reg.py:247, in CommandsRegistry.execute_command(self=<CommandsRegistry at 0x16cd00d00 (165 commands)>, id='napari-spatialdata:Scatter', execute_asynchronously=False, *args=(), **kwargs={})
    243 except Exception as e:
    244     if self._raise_synchronous_exceptions:
    245         # note, the caller of this function can also achieve this by
    246         # calling `future.result()` on the returned future object.
--> 247         raise e
    248     future.set_exception(e)
    250 return future

File ~/Documents/dev/napari/.pixi/envs/default/lib/python3.10/site-packages/app_model/registries/_commands_reg.py:242, in CommandsRegistry.execute_command(self=<CommandsRegistry at 0x16cd00d00 (165 commands)>, id='napari-spatialdata:Scatter', execute_asynchronously=False, *args=(), **kwargs={})
    240 future: Future = Future()
    241 try:
--> 242     future.set_result(cmd(*args, **kwargs))
        future = <Future at 0x3011a29e0 state=pending>
        cmd = <function Store.inject.<locals>._inner.<locals>._exec at 0x3011913f0>
        args = ()
        kwargs = {}
    243 except Exception as e:
    244     if self._raise_synchronous_exceptions:
    245         # note, the caller of this function can also achieve this by
    246         # calling `future.result()` on the returned future object.

File ~/Documents/dev/napari/.pixi/envs/default/lib/python3.10/site-packages/in_n_out/_store.py:934, in Store.inject_processors.<locals>._deco.<locals>._exec(*args=(), **kwargs={})
    932 @wraps(func)
    933 def _exec(*args: P.args, **kwargs: P.kwargs) -> R:
--> 934     result = func(*args, **kwargs)
        func = <function Store.inject.<locals>._inner.<locals>._exec at 0x301191090>
        args = ()
        kwargs = {}
    935     if result is not None:
    936         self.process(
    937             result,
    938             type_hint=type_hint,
   (...)
    941             _funcname=getattr(func, "__qualname__", str(func)),
    942         )

File ~/Documents/dev/napari/.pixi/envs/default/lib/python3.10/site-packages/in_n_out/_store.py:804, in Store.inject.<locals>._inner.<locals>._exec(*args=(), **kwargs={})
    797 logger.debug(
    798     "  Calling %s with %r (injected %r)",
    799     _fname,
    800     bound.arguments,
    801     _injected_names,
    802 )
    803 try:
--> 804     result = func(**bound.arguments)
        bound = <BoundArguments (plugin='napari-spatialdata', widget_name='Scatter', full_name='Scatter (napari spatialdata)')>
        func = functools.partial(<function _toggle_or_get_widget at 0x16ccc9fc0>, plugin='napari-spatialdata', widget_name='Scatter', full_name='Scatter (napari spatialdata)')
        bound.arguments = {'plugin': 'napari-spatialdata', 'widget_name': 'Scatter', 'full_name': 'Scatter (napari spatialdata)'}
    805 except TypeError as e:
    806     if "missing" not in e.args[0]:

File ~/Documents/dev/napari/.pixi/envs/default/lib/python3.10/site-packages/napari/_qt/_qplugins/_qnpe2.py:352, in _toggle_or_get_widget(plugin='napari-spatialdata', widget_name='Scatter', full_name='Scatter (napari spatialdata)')
    350 if widget_param:
    351     kwargs[widget_param] = viewer
--> 352 return widget_callable(**kwargs), full_name
        kwargs = {'napari_viewer': Viewer(camera=Camera(center=(0.0, 0.0, 0.0), zoom=1.0, angles=(0.0, 0.0, 90.0), perspective=0.0, mouse_pan=True, mouse_zoom=True, orientation=(<DepthAxisOrientation.TOWARDS: 'towards'>, <VerticalAxisOrientation.DOWN: 'down'>, <HorizontalAxisOrientation.RIGHT: 'right'>)), cursor=Cursor(position=(1.0, 1.0), viewbox=None, scaled=True, style=<CursorStyle.STANDARD: 'standard'>, size=1.0), dims=Dims(ndim=2, ndisplay=2, order=(0, 1), axis_labels=('0', '1'), rollable=(True, True), range=(RangeTuple(start=0.0, stop=2.0, step=1.0), RangeTuple(start=0.0, stop=2.0, step=1.0)), margin_left=(0.0, 0.0), margin_right=(0.0, 0.0), point=(np.float64(0.0), np.float64(0.0)), last_used=0), grid=GridCanvas(stride=1, shape=(-1, -1), enabled=False, spacing=0.0), layers=[], help='', status='Ready', tooltip=Tooltip(visible=False, text=''), theme='dark', title='napari', mouse_over_canvas=True, mouse_move_callbacks=[], mouse_drag_callbacks=[<function drag_to_zoom at 0x16b167760>], mouse_double_click_callbacks=[<function double_click_to_zoom at 0x16b1676d0>], mouse_wheel_callbacks=[<function dims_scroll at 0x16b166d40>], _persisted_mouse_event={}, _mouse_drag_gen={}, _mouse_wheel_gen={}, _keymap={})}
        widget_callable = <class 'napari_spatialdata._view.QtAdataScatterWidget'>
        full_name = 'Scatter (napari spatialdata)'

File ~/Documents/dev/napari/.pixi/envs/default/lib/python3.10/site-packages/napari_spatialdata/_view.py:54, in QtAdataScatterWidget.__init__(self=<napari_spatialdata._view.QtAdataScatterWidget object>, napari_viewer=Viewer(camera=Camera(center=(0.0, 0.0, 0.0), zoo...use_drag_gen={}, _mouse_wheel_gen={}, _keymap={}), model=None)
     48 def __init__(self, napari_viewer: Viewer, model: DataModel | None = None):
     49     super().__init__()
     51     self._model = (
     52         model
     53         if model is not None
---> 54         else napari_viewer.window._dock_widgets["SpatialData"].widget().viewer_model._model
        self = <napari_spatialdata._view.QtAdataScatterWidget object at 0x301191000>
        model = None
        model is not None = False
        napari_viewer = Viewer(camera=Camera(center=(0.0, 0.0, 0.0), zoom=1.0, angles=(0.0, 0.0, 90.0), perspective=0.0, mouse_pan=True, mouse_zoom=True, orientation=(<DepthAxisOrientation.TOWARDS: 'towards'>, <VerticalAxisOrientation.DOWN: 'down'>, <HorizontalAxisOrientation.RIGHT: 'right'>)), cursor=Cursor(position=(1.0, 1.0), viewbox=None, scaled=True, style=<CursorStyle.STANDARD: 'standard'>, size=1.0), dims=Dims(ndim=2, ndisplay=2, order=(0, 1), axis_labels=('0', '1'), rollable=(True, True), range=(RangeTuple(start=0.0, stop=2.0, step=1.0), RangeTuple(start=0.0, stop=2.0, step=1.0)), margin_left=(0.0, 0.0), margin_right=(0.0, 0.0), point=(np.float64(0.0), np.float64(0.0)), last_used=0), grid=GridCanvas(stride=1, shape=(-1, -1), enabled=False, spacing=0.0), layers=[], help='', status='Ready', tooltip=Tooltip(visible=False, text=''), theme='dark', title='napari', mouse_over_canvas=True, mouse_move_callbacks=[], mouse_drag_callbacks=[<function drag_to_zoom at 0x16b167760>], mouse_double_click_callbacks=[<function double_click_to_zoom at 0x16b1676d0>], mouse_wheel_callbacks=[<function dims_scroll at 0x16b166d40>], _persisted_mouse_event={}, _mouse_drag_gen={}, _mouse_wheel_gen={}, _keymap={})
     55     )
     57     self.setLayout(QGridLayout())
     59     self._viewer = napari_viewer

File ~/Documents/dev/napari/.pixi/envs/default/lib/python3.10/weakref.py:137, in WeakValueDictionary.__getitem__(self=<WeakValueDictionary>, key='SpatialData')
    135 if self._pending_removals:
    136     self._commit_removals()
--> 137 o = self.data[key]()
        self = <WeakValueDictionary at 0x17d60ce20>
        self.data = {}
        key = 'SpatialData'
    138 if o is None:
    139     raise KeyError(key)

KeyError: 'SpatialData'

Sample of my environment (macOS):

napari                            0.6.6         pyh4da3b27_0                  8.3 KiB     conda  https://conda.anaconda.org/conda-forge/
napari-base                       0.6.6         pyhcf101f3_0                  2.7 MiB     conda  https://conda.anaconda.org/conda-forge/
napari-console                    0.1.4         pyhc04f84c_0                  15.3 KiB    conda  https://conda.anaconda.org/conda-forge/
napari-matplotlib                 3.0.2         pyhc04f84c_0                  326.2 KiB   conda  https://conda.anaconda.org/conda-forge/
napari-plugin-engine              0.2.0         pyha07c04f_3                  32.4 KiB    conda  https://conda.anaconda.org/conda-forge/
napari-plugin-manager             0.1.9         pyhd8ed1ab_0                  44.2 KiB    conda  https://conda.anaconda.org/conda-forge/
napari-spatialdata                0.5.4.post0   pyh73487a3_0                  83 KiB      conda  https://conda.anaconda.org/conda-forge/
napari-svg                        0.2.1         pyha07c04f_0                  19.5 KiB    conda  https://conda.anaconda.org/conda-forge/
python                            3.10.19       hcd7f573_2_cpython            11.1 MiB    conda  https://conda.anaconda.org/conda-forge/
python-build                      1.3.0         pyhff2d567_0                  25.5 KiB    conda  https://conda.anaconda.org/conda-forge/
python-dateutil                   2.9.0.post0   pyhe01879c_2                  227.8 KiB   conda  https://conda.anaconda.org/conda-forge/
python-tzdata                     2025.3        pyhd8ed1ab_0                  140.2 KiB   conda  https://conda.anaconda.org/conda-forge/
python_abi                        3.10          8_cp310                       6.8 KiB     conda  https://conda.anaconda.org/conda-forge/

Start with napari_spatialdata/_view.py, especially QtAdataScatterWidget.init, and reproduce the failure by opening Scatter or View from the napari UI. Trace how the SpatialData dock widget is registered and verify that both actions open without raising KeyError: 'SpatialData'.