Arithmetic operator overloading in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to overload the addition operator for the class.

Python

class Number:
    def __init__(self, value):
        self.value = value

    def __add__(self, other):
        return Number(self.value [1] other.value)

num1 = Number(5)
num2 = Number(3)
result = num1 + num2
print(result.value)

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

A-

B+

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different operator like '-' or '*' instead of '+'

Forgetting to access other.value

Returning a raw number instead of a new Number instance

The __add__ method defines how the + operator works for the class. Using + inside returns the sum of the two values.

2fill in blank

medium

Complete the code to overload the multiplication operator for the class.

Python

class Number:
    def __init__(self, value):
        self.value = value

    def __mul__(self, other):
        return Number(self.value [1] other.value)

num1 = Number(4)
num2 = Number(6)
result = num1 * num2
print(result.value)

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

A/

B-

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+' or '-' instead of '*'

Not returning a new Number instance

Accessing other directly instead of other.value

The __mul__ method defines how the * operator works for the class. Using * inside returns the product of the two values.

3fill in blank

hard

Fix the error in the code to correctly overload the subtraction operator.

Python

class Number:
    def __init__(self, value):
        self.value = value

    def __sub__(self, other):
        return Number(self.value [1] other.value)

num1 = Number(10)
num2 = Number(4)
result = num1 - num2
print(result.value)

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

A+

B/

C*

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+' instead of '-'

Returning a raw number instead of a Number instance

Not accessing other.value

The __sub__ method defines how the - operator works for the class. Using - inside returns the difference of the two values.

4fill in blank

hard

Fill both blanks to overload the true division operator and return a float value.

Python

class Number:
    def __init__(self, value):
        self.value = value

    def __truediv__(self, other):
        return Number(self.value [1] other.value)

num1 = Number(9)
num2 = Number(2)
result = num1 [2] num2
print(result.value)

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

A/

B*

C-

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using '*' or '+' instead of '/'

Using integer division operator '//' instead of '/'

Not returning a new Number instance

The __truediv__ method defines how the / operator works for the class. Both blanks should use the division operator to perform true division.

5fill in blank

hard

Fill all three blanks to overload addition, subtraction, and multiplication operators correctly.

Python

class Number:
    def __init__(self, value):
        self.value = value

    def __add__(self, other):
        return Number(self.value [1] other.value)

    def __sub__(self, other):
        return Number(self.value [2] other.value)

    def __mul__(self, other):
        return Number(self.value [3] other.value)

num1 = Number(7)
num2 = Number(3)
print((num1 + num2).value)
print((num1 - num2).value)
print((num1 * num2).value)

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

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up operators between methods

Using division '/' in any of these methods

Not returning a new Number instance

Each method overloads a different operator: __add__ uses +, __sub__ uses -, and __mul__ uses * to perform the correct arithmetic operations.