How to define methods in python classes

The two most important members of a Python class are variables and methods. The class variables belong to the class itself and are used to define the state data contained in the class itself: while the instance variables belong to the objects of the class and are used to Define the state data contained in the object: methods are used to define the behavior or function implementation of the object of this class.

For the definition of methods in Python classes, we can summarize four types: Recommended learning: Python video tutorial)

1. Without self, cls parameters and without decorators (staticmethod, classmethod)

The definition code is as follows:

class Student(object):
    def func(name):
        print('my name is {}'.format(name))

2 , Normal method definition, with self parameter

The definition code is as follows:

class Student(object):
    def func(self, name):
        print('my name is {}'.format(name))

3. Class method: add decorator (classmethod)

The definition code is as follows:

class Student(object):
    @classmethod
    def func(cls, name):
        print('my name is {} from {}'.format(name, cls.__name__))

Static method: add decorator (staticmethod)

The definition code is as follows:

class Student(object):
    @staticmethod
    def func(name):
        print('my name is {}'.format(name))

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