Python Coding challenge - Day 332| What is the output of the following Python Code?

Explanation:

1. import itertools:

This imports the itertools module, which provides a collection of tools for creating iterators for efficient looping.

One of its functions, combinations(), generates all possible combinations of a specific length from a given iterable (e.g., list, string, etc.).

2. itertools.combinations([1, 2, 3], 2):

What does it do?

itertools.combinations(iterable, r) generates all possible combinations of r elements from the iterable.

It selects elements in lexicographic order (sorted order of input).

Combinations are generated without replacement, meaning an element can only appear once in each combination, and the order of elements within a combination doesn't matter.

Here:

The iterable is [1, 2, 3].

r = 2, so we want all combinations of length 2.

The possible combinations are:

(1, 2)

(1, 3)

(2, 3)

3. list(itertools.combinations([1, 2, 3], 2)):

What happens here?

itertools.combinations() returns an iterator that produces the combinations one by one.

Wrapping it with list() converts the iterator into a list containing all the combinations.

Result:

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

4. print(result):

This prints the final list of combinations to the console:

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

Final Output:

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