[SOS]非绑定方法调用?

请问怎样是"非绑定方法调用"与"绑定方法调用"有什么区别?

谢谢

在Python Library Reference中

2.3.10.4 Methods

Class instance methods are either bound or unbound, referring to whether the method was accessed through an instance or a class, respectively. When a method is unbound, its im_self attribute will be None and if called, an explicit self object must be passed as the first argument. In this case, self must be an instance of the unbound method's class (or a subclass of that class), otherwise a TypeError is raised.

也就是说一个类实例的方法，要么是绑定的，要么是非绑定的。如果一个方法被绑定，那么这个方法的 im_self不为空，否则就是非绑定的。在调用非绑定的方法时会抛出异常。

谢谢