Python Coding challenge - Day 443| What is the output of the following Python Code?

Code Explanation:

Line 1:

from itertools import groupby

This imports the groupby function from Python’s built-in itertools module.

groupby is used to group consecutive elements in an iterable (like a list) that are the same.

Line 2:

nums = [1, 1]

This creates a list called nums containing two elements: [1, 1].

Both elements are the same and are next to each other — this is important for groupby.

Line 3:

groups = [(k, list(g)) for k, g in groupby(nums)]

This line uses list comprehension to group the items. Let's break it into parts:

groupby(nums):

Looks at the list from left to right.

Groups consecutive elements that are the same.

In this case, 1 and 1 are next to each other, so they’re grouped into one group.

For each group:

k is the value being grouped (in this case, 1)

g is a generator (iterator) over the group of matching values

 list(g):

Converts the group iterator g into an actual list, so we can see the contents.

So the comprehension becomes:

groups = [(1, [1, 1])]

Line 4:

print(groups)

This prints the final result.

Final Output:

[(1, [1, 1])]