try:
    bpy.ops.keentools_facebuilder.add_head()
except RuntimeError:    
    bpy.ops.keentools_facebuilder.reconstruct_head()
    
obj = bpy.context.object
settings.fix_heads()
headnum = len(settings.heads)

face_path= './faceimages/'
fb = FBLoader.new_builder()
params = cameras.get_camera_params(obj)
if params is None:
    params = cameras.default_camera_params()

override_context = bpy.context.copy()
area = [area for area in bpy.context.screen.areas if area.type == "VIEW_3D"][0]
override_context['window'] = bpy.context.window
override_context['screen'] = bpy.context.screen
override_context['area'] = area
override_context['region'] = area.regions[-1]
override_context['scene'] = bpy.context.scene
override_context['space_data'] = area.spaces.active

count = 0 
for i in os.listdir(face_path):
    FBLoader.add_new_camera_with_image(0, face_path + i)
    bpy.ops.keentools_facebuilder.pinmode(override_context, 'INVOKE_DEFAULT', headnum=0, camnum=count)
    bpy.ops.keentools_facebuilder.pickmode(override_context, 'EXEC_DEFAULT', headnum=0, camnum=count)
    count +=1
    
FBLoader.update_cameras_from_old_version(0)
bpy.ops.keentools_facebuilder.bake_tex()
bpy.ops.keentools_facebuilder.create_blendshapes()`