11 Python Mro

method resolution order

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# method resolution order
# mro

class A(object):
    def hello(self):
        print('class A says hello')

class B(A):
    pass

class C(A):

    # class variable
    BP_URL = 'https://xxxxx'

    def __init__(self):
        self.name = 'ok'

    @staticmethod
    def print_hello(name, age):
        ''' staticmethod

        cannot access any class or self variabel/method
        '''
        pass

    @classmethod
    def say(cls):
        '''class method

        can access class level variable/method
        '''
        print(cls.BP_URL)


    def hello(self):
        print('class C says hello')

class D(C, B):
    pass

if __name__ == '__main__':
    d = D()
    d.hello()
    # to print the mro of one class
    print(d.__class__.__mro__)