Python Coding challenge - Day 1209| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Creating a Multi-line String

code = """

x = 5

print(x * 2)

"""

✅ Explanation

A multi-line string is stored inside the variable code.

Notice carefully:

This is not executable code yet.

It is simply plain text.

Current memory:

code

↓

"x = 5

print(x * 2)"

Think of it like writing Python code inside a notebook.

Notebook

↓

x = 5

print(x * 2)

Nothing executes yet.

🔹 2. Understanding Triple Quotes

"""

x = 5

print(x * 2)

"""

✅ Explanation

Triple quotes (""" """) allow Python to store multiple lines inside one string.

Python treats everything between the quotes as text.

Current value:

"x = 5

print(x * 2)"

No variable x exists yet because Python has not executed the string.

🔹 3. Calling compile()

obj = compile(code, "", "exec")

✅ Explanation

The compile() function converts text (source code) into a code object.

Syntax:

compile(source, filename, mode)

Here:

source → code

filename → "" (empty string)

mode → "exec"

Current flow:

Source Code (String)

↓

compile()

↓

Code Object

🔹 4. Understanding the "exec" Mode

"exec"

✅ Explanation

compile() supports three modes:

Mode Purpose

"exec" Multiple Python statements

"eval" Single expression

"single" One interactive statement

Here,

"x = 5

print(x * 2)"

contains multiple statements, so "exec" is used.

🔹 5. Creating the Code Object

obj = compile(...)

✅ Explanation

Python creates a compiled code object.

Memory:

obj

↓

Compiled Python Code

Think of it like:

Recipe

↓

Prepared Dish

The code is now ready to execute.

🔹 6. Calling exec()

exec(obj)

✅ Explanation

exec() executes the compiled code object.

Execution begins from the first line inside the compiled code.

Flow:

Code Object

↓

exec()

↓

Execute Line 1

↓

Execute Line 2

🔹 7. First Executed Statement

x = 5

✅ Explanation

Python creates a variable named x.

Memory:

x

↓

5

Current memory:

x = 5

🔹 8. Second Executed Statement

print(x * 2)

✅ Explanation

Python evaluates:

x * 2

Current value:

5 × 2

↓

10

Then:

print(10)

🔹 9. Printing the Result

print(x * 2)

✅ Explanation

Python prints:

10

🎯 Final Output

10

Book: Mastering Pandas with Python