Python Coding challenge - Day 1223| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Importing itemgetter

from operator import itemgetter

✅ Explanation

itemgetter is imported from Python's built-in operator module.

It creates a function that retrieves an item from a sequence (such as a list, tuple, or dictionary).

Instead of writing indexing manually, itemgetter() does it automatically.

Think of it as an automatic index picker.

Sequence

↓

itemgetter(index)

↓

Return Item

Nothing executes yet.

🔹 2. Creating the List

students = [

    ("A", 90),

    ("B", 80)

]

✅ Explanation

A list named students is created.

Each element of the list is a tuple.

Current Memory

students

↓

[

 ("A",90),

 ("B",80)

]

Visual Representation

students

Index

0  → ("A",90)

1  → ("B",80)

🔹 3. Understanding the First Tuple

("A", 90)

✅ Explanation

The first tuple contains two values.

Tuple

Index

0 → "A"

1 → 90

Here,

Index 0 stores the student's name.

Index 1 stores the student's marks.

🔹 4. Accessing the First Student

students[0]

✅ Explanation

Python retrieves the first element from the list.

Current Memory

students

↓

[

 ("A",90),

 ("B",80)

]

Result

("A",90)

So,

students[0]

returns

("A", 90)

🔹 5. Creating the itemgetter

itemgetter(1)

✅ Explanation

itemgetter(1) creates a function.

This function always returns the item at index 1.

Think of it like this:

itemgetter(1)

↓

"Always Pick Second Item"

Internally it behaves almost like:

def get_item(obj):

    return obj[1]

🔹 6. Calling the Function

itemgetter(1)(students[0])

✅ Explanation

Python performs two operations.

Step 1

students[0]

returns

("A",90)

Step 2

itemgetter(1)

takes that tuple and extracts the value at index 1.

Tuple

Index

0 → "A"

1 → 90

Returned value

90

🔹 7. Printing the Result

print(itemgetter(1)(students[0]))

✅ Explanation

Python prints the extracted value.

Output

90

🎯 Final Output

90