python根据字符串导入模块

path = "auth.my_auth.AUTH"

import importlib

model_path, class_name = path.rsplit(".", 1)
model = importlib.import_module(model_path)  # 根据"auth.my_auth"导入my_auth模块
obj = getattr(model, class_name)()  # 反射并实例化