Moderate Python Question 204 of 228

What is a generator in Python?

Python & Django · Speak this in 60–90 seconds · Faridabad & Delhi NCR

IdeaPython

HowWhat happens inside

Why they askShows real use

A generator yields values lazily with yield instead of building a full list in memory.

Why interviewers care about Python:

Python questions separate people

who only read docs from people who shipped.

Keep it short, concrete,

and tied to Python work.

Stay structured

Name the idea, why it exists, then one short example.

Close cleanly

End with when you use it and one common pitfall.

Before you speak the answer, walk the interviewer through these steps:

1
A generator yields values
lazily with yield instead of building a full list in memory.
2
I use it for
large files and streams.
3
Once consumed, it is
exhausted unless recreated.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

Here's a short line you can speak, broken into clear beats:

Say this line

“I use it for large files and streams.”

Break into beats

Iuseitforlargefiles

Speaking order

2987408337471632900

Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

A generator yields values lazily with yield instead of building a full list in memory. I use it for large files and streams.