Python Coding challenge - Day 696| What is the output of the following Python Code?

 

Code Explanation:

1) import itertools

Imports the itertools module, which provides iterator-building functions like permutations, combinations, cycle, etc.

2) nums = [1, 2, 3]

Creates a Python list named nums containing three integers:

[1, 2, 3]

3) p = itertools.permutations(nums, 2)

itertools.permutations(iterable, r) → generates all possible ordered arrangements (permutations) of length r.

Here:

iterable = nums = [1,2,3]

r = 2 → we want permutations of length 2.

So p is an iterator that will produce all ordered pairs from [1,2,3] without repeating elements.

4) print(list(p))

Converts the iterator p into a list, so we can see all generated permutations at once.

Step by step, the pairs generated are:

(1, 2)

(1, 3)

(2, 1)

(2, 3)

(3, 1)

(3, 2)

Final result:

[(1, 2), (1, 3), (2, 1), (2, 3), (3, 1), (3, 2)]

Output

[(1, 2), (1, 3), (2, 1), (2, 3), (3, 1), (3, 2)]

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