知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 With this code we've "concealed" attribute password through the use of @property which triggers AttributeError assertion any time you try and access it straight, although we employed @property.setter to established the actual instance variable password_hash. This was noticed by Khushal Bherwani who posted an example on X, https://gaurprojectsnoida.blogspot.com