Python Coding challenge - Day 783| What is the output of the following Python Code?

 

Code Explanation:

Importing the itertools Module

import itertools

The itertools module is part of Python’s standard library.

It contains fast, memory-efficient tools for working with iterators.

Here, we’ll use itertools.cycle() — a function that loops infinitely over a given sequence.

Creating a List of Colors

colors = ["red", "blue", "green"]

A list named colors is created with three elements: "red", "blue", and "green".

This list will be used to demonstrate continuous cycling through its elements.

Creating an Infinite Cycle Iterator

cycle_colors = itertools.cycle(colors)

The cycle() function from itertools returns an iterator that loops over the list endlessly.

After reaching the end (green), it goes back to the start (red) again.

So if you keep calling next(cycle_colors), you’ll get:

red → blue → green → red → blue → green → ...

Using List Comprehension to Extract Elements

result = [next(cycle_colors) for _ in range(5)]

This line runs a loop 5 times (because of range(5)).

Each time, it calls next(cycle_colors) to get the next item from the cycle iterator.

The retrieved elements are stored in the list result.

After 5 iterations, result will contain:

['red', 'blue', 'green', 'red', 'blue']

Printing Specific Values

print(result[-1], len(result))

result[-1] → gives the last element in the list ('blue').

len(result) → returns the number of elements in the list (5).

So this line prints:

blue 5

Final Output

blue 5

500 Days Python Coding Challenges with Explanation