__init__.py

import bpy
from bpy.props import PointerProperty, CollectionProperty
from bpy.types import Scene, Object
from .panels import *
from .operators import *
from .properties import *

bl_info = {
    "name": "3D Morphable Model Addon",
    "author": "Omar Omar",
    "description": "A Blender python plugin for 3D Morphable Face Models",
    "blender": (3, 3, 1),
    "version": (0, 1, 0),
    "category": "3D View"
}

classes = (Main_PT_Panel, Animator_PT_Panel, Texture_PT_Panel, Main_OT_Install_Dependencies, Main_OT_Facial_Recognition_Mapper,
           Main_OT_Create_Model, Main_OT_UV_Unwrap_Model, Main_OT_Extract_Texture, Main_OT_Take_Picture, File_Pickers, Animation_Properties,
           Coefficients_Collection, Main_OT_Show_More_Shape_Coefficients, Main_OT_Show_More_Blendshape_Coefficients)

def register():
    for cls in classes:
        bpy.utils.register_class(cls)
    Scene.file_pickers = PointerProperty(type=File_Pickers)
    Scene.animation_properties = PointerProperty(type=Animation_Properties)
    Object.shape_coefficients = CollectionProperty(type=Coefficients_Collection)
    Object.blendshape_coefficients = CollectionProperty(type=Coefficients_Collection)

def unregister():
    for cls in classes:
        bpy.utils.unregister_class(cls)
    del Scene.file_pickers
    del Scene.animation_properties

if __name__ == "__main__":
    try:
        unregister()
    except:
        pass
    register()