Python Coding challenge - Day 1200| What is the output of the following Python Code?

Code Explanation:

🔹 1. Defining the First Generator Function

def even():

✅ Explanation

A generator function named even() is created.

Since it contains the yield keyword, it becomes a generator.

It will generate values one at a time, not all at once.

Current structure:

even()

↓

Generator Function

Nothing executes yet.

🔹 2. First yield Statement

yield 2

✅ Explanation

When someone calls:

next(generator)

the first value returned will be:

2

After returning 2, the generator pauses.

Visual:

Start

↓

yield 2

↓

Pause

🔹 3. Second yield Statement

yield 4

✅ Explanation

When the generator resumes,

it continues from where it stopped.

Now it returns:

4

Then the generator finishes.

Visual:

Resume

↓

yield 4

↓

End

🔹 4. Defining Another Generator

def numbers():

✅ Explanation

A second generator function named numbers() is created.

Current structure:

numbers()

│

├── yield 1

├── yield from even()

└── yield 6

Again,

nothing executes yet.

🔹 5. First Value of numbers()

yield 1

✅ Explanation

The first value produced by numbers() is:

1

Generator pauses here.

Visual:

numbers()

↓

yield 1

↓

Pause

🔹 6. Understanding yield from

yield from even()

✅ Explanation

This is the most important line.

yield from means:

Take every value

generated by

even()

and yield it

one by one.

It is like saying:

"I'll let another generator

continue my work."

Instead of writing:

for value in even():

    yield value

Python lets you write:

yield from even()

Both do the same thing.

🔹 7. Executing even()

Python now starts the even() generator.

First value:

yield 2

Current output sequence:

1

2

Generator pauses again.

🔹 8. Continuing even()

Generator resumes.

Next statement:

yield 4

Current sequence becomes:

1

2

4

Now even() is finished.

Control returns to numbers().

Visual:

numbers()

↓

yield from even()

↓

2

↓

4

↓

Back to numbers()

🔹 9. Last yield

yield 6

✅ Explanation

After even() finishes,

numbers() continues with its remaining code.

Next value:

6

Final sequence:

1

2

4

6

🔹 10. Creating a List

list(numbers())

✅ Explanation

numbers() returns a generator object.

list() keeps calling:

next()

until the generator finishes.

Collected values:

[1, 2, 4, 6]

🔹 11. Printing the Result

print(list(numbers()))

✅ Explanation

Python prints the final list.

Output:

[1, 2, 4, 6]

🎯 Final Output

[1, 2, 4, 6]

Book: Python for Ethical Hacking Tools, Libraries, and Real-World Applications