Custom Prop names have length limit

[tsvilans]

Best solution would be to not flatten nested dictionaries by prepending parent key names, and instead actually just use nested dictionaries.

ID prop group filtering and access can be done like this:

import bpy, idprop

cube = bpy.data.objects['Cube']
d = cube.get('tommy') # d is also a IDPropertyGroup, since it is assigned as a dict

for i in d.items():
    print(i)
    if isinstance(i[1], idprop.types.IDPropertyGroup):
        print(i[1].__class__)

Results in:

('this', 'that') <-- 'that' is a normal string
('numbers', 100) <-- 100 is a normal integer
('doodeedoo', <bpy id prop: owner="OBCube", name="doodeedoo", address=0x000001A6CFD9BF48>)
<class 'IDPropertyGroup'>