Saturday 4 May 2024

Python Coding challenge - Day 197 | What is the output of the following Python Code?



class Tripler(int):
    def __mul__(self, other):
        return super().__mul__(other - 2)
t = Tripler(6)
result = t * 4

Solution and Explanation:

let's break down the code step by step:

class Tripler(int):: This line defines a new class named Tripler that inherits from the int class. This means that Tripler inherits all the properties and methods of the int class.
def __mul__(self, other):: This defines a special method __mul__() which overrides the multiplication behavior of instances of the Tripler class. This method is called when the * operator is used with instances of the Tripler class.
return super().__mul__(other - 2): Inside the __mul__() method, it subtracts 2 from the other operand and then calls the __mul__() method of the superclass (in this case, the int class) using super(). It passes the modified other operand to the superclass method. Essentially, it performs multiplication of the Tripler instance with the modified value of other.
t = Tripler(6): This line creates an instance of the Tripler class with the value 6. The Tripler class inherits from int, so it can be initialized with an integer value.
result = t * 4: This line uses the * operator with the Tripler instance t and the integer 4. Since the Tripler class has overridden the __mul__() method, the overridden behavior is invoked. In this case, it subtracts 2 from the other operand (which is 4) and then performs multiplication.
print(result): Finally, this line prints the value of result.
Now, let's follow through the multiplication:

other is 4.
2 is subtracted from other, making it 2.
The __mul__() method of the int class (the superclass) is called with 2 as the argument.
The superclass's __mul__() method multiplies the Tripler instance (t) by 2.
The result of this multiplication is assigned to result.
Finally, result is printed.
So, when you run this code, it should output 12, which is the result of multiplying 6 by (4 - 2).


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