del x.counter
The other kind of instance attribute reference is a *method*. A method is a
-function that "belongs to" an object. (In Python, the term method is not unique
-to class instances: other object types can have methods as well. For example,
-list objects have methods called append, insert, remove, sort, and so on.
-However, in the following discussion, we'll use the term method exclusively to
-mean methods of class instance objects, unless explicitly stated otherwise.)
+function that "belongs to" an object.
.. index:: pair: object; method