Python Coding challenge - Day 358| What is the output of the following Python Code?

 

Code Explanation:

import itertools

This imports the itertools module, which provides efficient iterator functions for looping and data manipulation.

a = [1, 2]

This defines a list a with two elements: 1 and 2.

b = [3, 4]

This defines another list b with two elements: 3 and 4.

result = list(itertools.chain(a, b))

itertools.chain(a, b):

The chain() function takes multiple iterables (lists a and b in this case) and creates an iterator that produces elements from each iterable one by one.

It avoids creating a new list immediately, making it memory efficient.

list(itertools.chain(a, b)):

The chain object returned is converted into a list using list(), which collects all elements from the chained iterator into a single list.

Internally, itertools.chain(a, b) works as follows:

Takes the first iterable (a) and yields elements 1 and 2.

Moves to the next iterable (b) and yields elements 3 and 4.

The final result stored in result is:

[1, 2, 3, 4]

print(result)

This prints the final concatenated list:

[1, 2, 3, 4]

Final Output:

[1, 2, 3, 4]