Core Python Programming

13.7. Binding and Method Invocation

Now we need to readdress the Python concept of binding, which is associated only with method invocation. We will first review the facts about methods. First, a method is simply a function defined as part of a class. This means that methods are class attributes (not instance attributes). Second, methods can be invoked only when there is an instance of the class in which the method was defined. When there is an instance present, the method is considered bound. Without an instance, a method is considered unbound. And third, the first argument in any method definition is the variable self, which represents the instance object which invokes the method.

CORE NOTE: What is self?

The variable self is used in class ...