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Static and Class Methods
As of Python 2.2, it is possible to define two kinds of methods within a class that can be called without an instance: static methods work roughly like simple instance-less functions inside a class, and class methods are passed a class instead of an instance. Although this feature was added in conjunction with the new-style classes discussed in the prior sections, static and class methods work for classic classes too.
To enable these method modes, special built-in functions called staticmethod and classmethod must be called within the class, or invoked with the decoration syntax we’ll meet later in this chapter. In Python 3.0, instance-less methods called only through a class name do not require a staticmethod declaration, but such methods called through instances do.
