Python Coding challenge - Day 437| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the inner Generator Function

def inner():

    yield 1

    yield 2

inner() is a generator function, which means it returns an iterator when called.

It yields:

First: 1

Then: 2

2. Defining the outer Generator Function

def outer():

    yield from inner()

outer() is also a generator.

yield from inner() delegates to the inner() generator.

It automatically yields all values from inner(), one by one.

So outer() behaves just like inner() here.

3. Calling and Converting to a List

print(list(outer()))

outer() is called, returning a generator.

list(...) consumes the generator, collecting all yielded values into a list.

Output:

[1, 2]

4. Why yield from is Useful

It’s a cleaner, more readable way to re-yield values from a sub-generator.

Without yield from, you’d have to do:

def outer():

    for value in inner():

        yield value

Final Output

[1, 2]