Best practices for multiple inheritance in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a class that inherits from two parent classes.

Python

class Child([1]):
    pass

Drag options to blanks, or click blank then click option'

AParent1, Parent2

BParent1 Parent2

CParent1 & Parent2

DParent1 | Parent2

Attempts:

3 left

💡 Hint

Common Mistakes

Using spaces instead of commas between parent classes.

Using operators like & or | which are invalid here.

In Python, multiple inheritance is done by listing parent classes separated by commas inside parentheses.

2fill in blank

medium

Complete the code to call the __init__ method of the first parent class in multiple inheritance.

Python

class Child(Parent1, Parent2):
    def __init__(self):
        [1].__init__(self)

Drag options to blanks, or click blank then click option'

Asuper()

BParent1

CChild

DParent2

Attempts:

3 left

💡 Hint

Common Mistakes

Using super() when wanting to call a specific parent's __init__.

Calling __init__ on the child class itself.

To call a specific parent class's __init__, use Parent1.__init__(self).

3fill in blank

hard

Fix the error in the code to properly use super() in multiple inheritance.

Python

class Child(Parent1, Parent2):
    def __init__(self):
        [1]().__init__()

Drag options to blanks, or click blank then click option'

Aself

BParent1

CChild

Dsuper

Attempts:

3 left

💡 Hint

Common Mistakes

Calling Parent1() instead of super().

Calling __init__ on self directly.

super() returns a proxy object to delegate method calls properly in multiple inheritance.

4fill in blank

hard

Fill both blanks to create a method that calls the same method from all parent classes using super().

Python

class Child(Parent1, Parent2):
    def greet(self):
        [1]().[2]()

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Asuper

Bgreet

Chello

Dself

Attempts:

3 left

💡 Hint

Common Mistakes

Using self.greet() which causes recursion.

Using a wrong method name like hello.

Use super().greet() to call the greet method from the next class in the method resolution order.

5fill in blank

hard

Fill all three blanks to create a class that uses super() in __init__ and a method to demonstrate method resolution order.

Python

class Child([1]):
    def __init__(self):
        [2]().__init__()
    def show(self):
        print('Child show')
        [3]().show()

Drag options to blanks, or click blank then click option'

AParent1, Parent2

Bsuper

DParent2

Attempts:

3 left

💡 Hint

Common Mistakes

Not listing both parents in the class definition.

Calling parent methods directly instead of using super().

The class inherits from Parent1 and Parent2. super() is used to call the next __init__ and show methods in the method resolution order.