Extending two classes in another class?

Question

Suppose you have two classes x and y and each has a print method. If you have another class z and extend both x and y, then if you call print() from class z what will be happen?

What is class c (or is that a typo and you meant class z)? — martineau
– martineau, Commented Sep 25, 2018 at 14:33
Possible duplicate of Python and order of methods in multiple inheritance — stovfl
– stovfl, Commented Sep 25, 2018 at 14:37

Prometheus · Accepted Answer · 2018-09-25 14:23:09Z

1

Check this site: https://pythonprogramminglanguage.com/multiple-inheritance/

And you are right, you separate with commas.

answered Sep 25, 2018 at 14:23

Prometheus

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Comments

Taohidul Islam · Accepted Answer · 2018-09-25 14:30:56Z

0

Here the order of classes matters. If you write

class Z(X,Y)

then my_print method of class X will be executed. and if you write class Z(Y,X) then my_print method of class Y will be executed.

note: there is built in print() function in python, please rename it. And class names should be Pascal case.

Example: this will output 'x':

class X:
    def my_print(self):
        print('x')

class Y:
    def my_print(self):
        print('y')

class Z(X, Y):
    pass

my_object = Z()
my_object.my_print()

and this will output 'y'

class X:
        def my_print(self):
            print('x')

    class Y:
        def my_print(self):
            print('y')

    class Z(Y, X):
        pass

    my_object = Z()
    my_object.my_print()

edited Sep 25, 2018 at 14:30

answered Sep 25, 2018 at 14:24

Taohidul Islam

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1 Comment

Rabbani_ Over a year ago

Is print method of both class x and y will throw an error ?

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