Python Coding challenge - Day 633| What is the output of the following Python Code?

 

Code Explanation:

1. Class Definition

class Repeater:

What it does:

Defines a custom class named Repeater.

2. The __init__ Method

def __init__(self, val, times):

    self.val, self.times = val, times

What it does:

The constructor is called when an object is created.

It stores:

val: the value to repeat

times: how many times to repeat it

Example:

r = Repeater('X', 3)

Now:

self.val = 'X'

self.times = 3

3. The __iter__ Method

def __iter__(self):

    return (self.val for _ in range(self.times))

What it does:

This is the key to making the object iterable.

Instead of writing a full generator function, it returns a generator expression:

(self.val for _ in range(self.times))

That expression yields 'X' exactly 3 times.

4. Creating the Object

r = Repeater('X', 3)

What it does:

Creates an instance of Repeater where:

'X' is the value to repeat

3 is how many times to repeat it

5. Converting to a List

print(list(r))

What it does:

Calls r.__iter__(), which returns a generator.

list(...) consumes the generator and builds a list from it.

Internally equivalent to:

output = []

for item in r:

    output.append(item)

print(output)

Final Output:

['X', 'X', 'X']

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