PyAPI: Use annotations for RNA definitions

- Logical use of fields since they define type information.
- Avoids using ordered-dict metaclass.

Properties using regular assignments will print a warning and load,
however the order is undefined.

release/scripts/templates_py/addon_add_object.py

@@ -45,7 +45,7 @@ class OBJECT_OT_add_object(Operator, AddObjectHelper):
     bl_label = "Add Mesh Object"
     bl_options = {'REGISTER', 'UNDO'}
 
-    scale = FloatVectorProperty(
+    scale: FloatVectorProperty(
         name="scale",
         default=(1.0, 1.0, 1.0),
         subtype='TRANSLATION',

release/scripts/templates_py/custom_nodes.py

@@ -30,10 +30,15 @@ class MyCustomSocket(NodeSocket):
         ('DOWN', "Down", "Where your feet are"),
         ('UP', "Up", "Where your head should be"),
         ('LEFT', "Left", "Not right"),
-        ('RIGHT', "Right", "Not left")
+        ('RIGHT', "Right", "Not left"),
     )
 
-    my_enum_prop = bpy.props.EnumProperty(name="Direction", description="Just an example", items=my_items, default='UP')
+    my_enum_prop: bpy.props.EnumProperty(
+        name="Direction",
+        description="Just an example",
+        items=my_items,
+        default='UP',
+    )
 
     # Optional function for drawing the socket input value
     def draw(self, context, layout, node, text):
@@ -71,8 +76,8 @@ class MyCustomNode(Node, MyCustomTreeNode):
     # These work just like custom properties in ID data blocks
     # Extensive information can be found under
     # http://wiki.blender.org/index.php/Doc:2.6/Manual/Extensions/Python/Properties
-    my_string_prop = bpy.props.StringProperty()
-    my_float_prop = bpy.props.FloatProperty(default=3.1415926)
+    my_string_prop: bpy.props.StringProperty()
+    my_float_prop: bpy.props.FloatProperty(default=3.1415926)
 
     # === Optional Functions ===
     # Initialization function, called when a new node is created.

release/scripts/templates_py/manipulator_operator.py

@@ -39,11 +39,11 @@ class SelectSideOfPlane(Operator):
     bl_label = "Select Side of Plane"
     bl_options = {'REGISTER', 'UNDO'}
 
-    plane_co = FloatVectorProperty(
+    plane_co: FloatVectorProperty(
         size=3,
         default=(0, 0, 0),
     )
-    plane_no = FloatVectorProperty(
+    plane_no: FloatVectorProperty(
         size=3,
         default=(0, 0, 1),
     )

release/scripts/templates_py/operator_file_export.py

@@ -25,7 +25,7 @@ class ExportSomeData(Operator, ExportHelper):
     # ExportHelper mixin class uses this
     filename_ext = ".txt"
 
-    filter_glob = StringProperty(
+    filter_glob: StringProperty(
         default="*.txt",
         options={'HIDDEN'},
         maxlen=255,  # Max internal buffer length, longer would be clamped.
@@ -33,13 +33,13 @@ class ExportSomeData(Operator, ExportHelper):
 
     # List of operator properties, the attributes will be assigned
     # to the class instance from the operator settings before calling.
-    use_setting = BoolProperty(
+    use_setting: BoolProperty(
         name="Example Boolean",
         description="Example Tooltip",
         default=True,
     )
 
-    type = EnumProperty(
+    type: EnumProperty(
         name="Example Enum",
         description="Choose between two items",
         items=(

release/scripts/templates_py/operator_file_import.py

@@ -28,7 +28,7 @@ class ImportSomeData(Operator, ImportHelper):
     # ImportHelper mixin class uses this
     filename_ext = ".txt"
 
-    filter_glob = StringProperty(
+    filter_glob: StringProperty(
         default="*.txt",
         options={'HIDDEN'},
         maxlen=255,  # Max internal buffer length, longer would be clamped.
@@ -36,13 +36,13 @@ class ImportSomeData(Operator, ImportHelper):
 
     # List of operator properties, the attributes will be assigned
     # to the class instance from the operator settings before calling.
-    use_setting = BoolProperty(
+    use_setting: BoolProperty(
         name="Example Boolean",
         description="Example Tooltip",
         default=True,
     )
 
-    type = EnumProperty(
+    type: EnumProperty(
         name="Example Enum",
         description="Choose between two items",
         items=(

release/scripts/templates_py/operator_mesh_add.py

@@ -49,25 +49,25 @@ class AddBox(bpy.types.Operator):
     bl_label = "Add Box"
     bl_options = {'REGISTER', 'UNDO'}
 
-    width = FloatProperty(
+    width: FloatProperty(
         name="Width",
         description="Box Width",
         min=0.01, max=100.0,
         default=1.0,
     )
-    height = FloatProperty(
+    height: FloatProperty(
         name="Height",
         description="Box Height",
         min=0.01, max=100.0,
         default=1.0,
     )
-    depth = FloatProperty(
+    depth: FloatProperty(
         name="Depth",
         description="Box Depth",
         min=0.01, max=100.0,
         default=1.0,
     )
-    layers = BoolVectorProperty(
+    layers: BoolVectorProperty(
         name="Layers",
         description="Object Layers",
         size=20,
@@ -75,15 +75,15 @@ class AddBox(bpy.types.Operator):
     )
 
     # generic transform props
-    view_align = BoolProperty(
+    view_align: BoolProperty(
         name="Align to View",
         default=False,
     )
-    location = FloatVectorProperty(
+    location: FloatVectorProperty(
         name="Location",
         subtype='TRANSLATION',
     )
-    rotation = FloatVectorProperty(
+    rotation: FloatVectorProperty(
         name="Rotation",
         subtype='EULER',
     )

release/scripts/templates_py/operator_modal.py

@@ -7,8 +7,8 @@ class ModalOperator(bpy.types.Operator):
     bl_idname = "object.modal_operator"
     bl_label = "Simple Modal Operator"
 
-    first_mouse_x = IntProperty()
-    first_value = FloatProperty()
+    first_mouse_x: IntProperty()
+    first_value: FloatProperty()
 
     def modal(self, context, event):
         if event.type == 'MOUSEMOVE':

release/scripts/templates_py/operator_modal_view3d.py

@@ -8,7 +8,7 @@ class ViewOperator(bpy.types.Operator):
     bl_idname = "view3d.modal_operator"
     bl_label = "Simple View Operator"
 
-    offset = FloatVectorProperty(
+    offset: FloatVectorProperty(
         name="Offset",
         size=3,
     )

release/scripts/templates_py/ui_list.py

@@ -7,8 +7,10 @@ class MESH_UL_mylist(bpy.types.UIList):
     # E.g. VGROUP_EMPTY = 1 << 0
 
     # Custom properties, saved with .blend file. E.g.
-    # use_filter_empty = bpy.props.BoolProperty(name="Filter Empty", default=False, options=set(),
-    #                                           description="Whether to filter empty vertex groups")
+    # use_filter_empty: bpy.props.BoolProperty(
+    #     name="Filter Empty", default=False, options=set(),
+    #     description="Whether to filter empty vertex groups",
+    # )
 
     # Called for each drawn item.
     def draw_item(self, context, layout, data, item, icon, active_data, active_propname, index, flt_flag):