Python Coding challenge - Day 1224| 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 using an index or key.

It is commonly used for sorting, mapping, and fast indexing.

Think of it as an automatic index selector.

Sequence

    │

    ▼

itemgetter(index)

    │

    ▼

Return Item

Nothing executes yet.

🔹 2. Creating the Tuple

data = (

    ("Python", 100),

    ("Java", 90)

)

✅ Explanation

A tuple named data is created.

It contains two tuples.

Current Memory

data

Index

0 → ("Python", 100)

1 → ("Java", 90)

Visual Representation

data

 │

 ├── 0 → ("Python",100)

 │

 └── 1 → ("Java",90)

🔹 3. Understanding the Inner Tuples

Each tuple stores two values.

("Python",100)

Index

0 → "Python"

1 → 100

and

("Java",90)

Index

0 → "Java"

1 → 90

So the structure is

data

↓

(

   ("Python",100),

   ("Java",90)

)

🔹 4. Creating the itemgetter

itemgetter(1)

✅ Explanation

itemgetter(1) creates a function.

This function always returns the element at index 1.

Internally it behaves almost like

def get_item(obj):

    return obj[1]

Memory Representation

itemgetter(1)

↓

Function

↓

Pick Index 1

🔹 5. Calling the Function

itemgetter(1)(data)

✅ Explanation

Python passes the entire data tuple into the function.

Current Memory

data

↓

(

 ("Python",100),

 ("Java",90)

)

The function picks index 1.

Returned value

("Java",90)

Visual Flow

data

↓

itemgetter(1)

↓

("Java",90)

🔹 6. Accessing [0]

itemgetter(1)(data)[0]

✅ Explanation

The returned tuple is

("Java",90)

Now Python accesses index 0.

Tuple

Index

0 → "Java"

1 → 90

Returned value

Java

🔹 7. Printing the Result

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

✅ Explanation

Python prints the extracted value.

Output

Java

🎯 Final Output

Java

Book:  700 Days Python Coding Challenges with Explanation