fix more type issues

masque/traits/annotatable.py

@@ -6,6 +6,9 @@ from ..utils import annotations_t
 from ..error import MasqueError
 
 
+_empty_slots = ()     # Workaround to get mypy to ignore intentionally empty slots for superclass
+
+
 T = TypeVar('T', bound='Annotatable')
 I = TypeVar('I', bound='AnnotatableImpl')
 
@@ -33,7 +36,7 @@ class AnnotatableImpl(Annotatable, metaclass=ABCMeta):
     """
     Simple implementation of `Annotatable`.
     """
-    __slots__ = ()
+    __slots__ = _empty_slots
 
     _annotations: annotations_t
     """ Dictionary storing annotation name/value pairs """
@@ -46,7 +49,7 @@ class AnnotatableImpl(Annotatable, metaclass=ABCMeta):
         return self._annotations
 
     @annotations.setter
-    def annotations(self, annotations: annotations_t):
+    def annotations(self, annotations: annotations_t) -> None:
         if not isinstance(annotations, dict):
             raise MasqueError(f'annotations expected dict, got {type(annotations)}')
         self._annotations = annotations

masque/traits/layerable.py

@@ -4,6 +4,9 @@ from abc import ABCMeta, abstractmethod
 from ..utils import layer_t
 
 
+_empty_slots = ()     # Workaround to get mypy to ignore intentionally empty slots for superclass
+
+
 T = TypeVar('T', bound='Layerable')
 I = TypeVar('I', bound='LayerableImpl')
 
@@ -50,7 +53,7 @@ class LayerableImpl(Layerable, metaclass=ABCMeta):
     """
     Simple implementation of Layerable
     """
-    __slots__ = ()
+    __slots__ = _empty_slots
 
     _layer: layer_t
     """ Layer number, pair, or name """

masque/traits/positionable.py

@@ -9,6 +9,9 @@ from numpy.typing import NDArray, ArrayLike
 from ..error import MasqueError
 
 
+_empty_slots = ()     # Workaround to get mypy to ignore intentionally empty slots for superclass
+
+
 T = TypeVar('T', bound='Positionable')
 I = TypeVar('I', bound='PositionableImpl')
 
@@ -85,7 +88,7 @@ class PositionableImpl(Positionable, metaclass=ABCMeta):
     """
     Simple implementation of Positionable
     """
-    __slots__ = ()
+    __slots__ = _empty_slots
 
     _offset: NDArray[numpy.float64]
     """ `[x_offset, y_offset]` """
@@ -108,7 +111,7 @@ class PositionableImpl(Positionable, metaclass=ABCMeta):
 
         if val.size != 2:
             raise MasqueError('Offset must be convertible to size-2 ndarray')
-        self._offset = val.flatten()
+        self._offset = val.flatten()        # type: ignore
 
     '''
     ---- Methods

masque/traits/repeatable.py

@@ -4,6 +4,9 @@ from abc import ABCMeta, abstractmethod
 from ..error import MasqueError
 
 
+_empty_slots = ()     # Workaround to get mypy to ignore intentionally empty slots for superclass
+
+
 if TYPE_CHECKING:
     from ..repetition import Repetition
 
@@ -55,7 +58,7 @@ class RepeatableImpl(Repeatable, metaclass=ABCMeta):
     """
     Simple implementation of `Repeatable`
     """
-    __slots__ = ()
+    __slots__ = _empty_slots
 
     _repetition: Optional['Repetition']
     """ Repetition object, or None (single instance only) """

masque/traits/rotatable.py

@@ -10,6 +10,9 @@ from ..error import MasqueError
 from ..utils import is_scalar, rotation_matrix_2d
 
 
+_empty_slots = ()     # Workaround to get mypy to ignore intentionally empty slots for superclass
+
+
 T = TypeVar('T', bound='Rotatable')
 I = TypeVar('I', bound='RotatableImpl')
 P = TypeVar('P', bound='Pivotable')
@@ -43,7 +46,7 @@ class RotatableImpl(Rotatable, metaclass=ABCMeta):
     """
     Simple implementation of `Rotatable`
     """
-    __slots__ = ()
+    __slots__ = _empty_slots
 
     _rotation: float
     """ rotation for the object, radians counterclockwise """

masque/traits/scalable.py

@@ -5,6 +5,9 @@ from ..error import MasqueError
 from ..utils import is_scalar
 
 
+_empty_slots = ()     # Workaround to get mypy to ignore intentionally empty slots for superclass
+
+
 T = TypeVar('T', bound='Scalable')
 I = TypeVar('I', bound='ScalableImpl')
 
@@ -36,7 +39,7 @@ class ScalableImpl(Scalable, metaclass=ABCMeta):
     """
     Simple implementation of Scalable
     """
-    __slots__ = ()
+    __slots__ = _empty_slots
 
     _scale: float
     """ scale factor for the entity """