fix reading __annotations__ attribute in python 3.10

fix reading annotations attribute in python 3.10
7bf707c4 · Durman · 771a4b94 · 7bf707c4 · 7bf707c4
--- a/__init__.py
+++ b/__init__.py
@@ -43,7 +43,7 @@
 bl_info = {
    "name": "Sverchok",
    "author": "sverchok-b3d@ya.ru various authors see https://github.com/nortikin/sverchok/graphs/contributors",
-    "version": (1, 0, 0),
+    "version": (1, 0, 1),
    "blender": (2, 93, 0),
    "location": "Node Editor",
    "category": "Node",

--- a/data_structure.py
+++ b/data_structure.py
@@ -1192,9 +1192,11 @@ def extend_blender_class(cls):
    Take into account that this decorator does not delete anything onto reload event
    """
    bl_class = getattr(bpy.types, cls.__name__)
-    for base_cls in chain([cls], cls.__bases__[1:]):
-        if hasattr(base_cls, '__annotations__'):
-            for name, prop in base_cls.__annotations__.items():
+    for base_cls in chain([cls], cls.__bases__):
+        # https://docs.python.org/3/howto/annotations.html#accessing-the-annotations-dict-of-an-object-in-python-3-9-and-older
+        # avoiding getting inherited annotations
+        if '__annotations__' in base_cls.__dict__:
+            for name, prop in base_cls.__dict__['__annotations__'].items():
                setattr(bl_class, name, prop)
        for key in (key for key in dir(base_cls) if not key.startswith('_')):
            setattr(bl_class, key, getattr(base_cls, key))