Bind unbound class methods in Python

Like a function, a class method in python is also an object that is transferred from a http://blog.sina.com.cn/s/blog_3fe961ae0100kew0.html. Because methods can be accessed through instances or through classes, there are two styles in Python: unbound class methods: no self uses a class to reference a method to return an unbound method object. To call it, you must explicitly provide an instance as the first parameter. Bound instance method: Self returns a bound method object through the instance access method. Python automatically binds a method to an instance, so we do not need to pass another instance parameter when calling it. Both methods are objects, which can be passed and saved to the list for waiting. Both require an instance as the first parameter (contains a self value), but Python automatically provides an instance when calling a binding method through an instance. For example, we run the following Code: Class test: def func (self, message): Print message object1 = test () x = object1.funcx ('Bind method object, instance is implicit ') t = test. funct (object1, 'Method object not bound, need to pass an instance') # T ('method object not bound, need to pass an instance ') # Call object1 = test () Incorrectly to generate an instance. object1.func returns a binding method and binds object1 and func. Test. func uses classes to reference methods. We get an unbound method object. To call it, you have to pass an instance parameter, such as T (object1, 'unbound method object, need to pass an instance '). Most of the time, we call methods directly, so we generally do not notice the method object. However, if you start to write code for a common call object, you need to pay special attention to the unbinding method. They need to pass an instance parameter.