What is a requirements.txt file?
PICTURE THIS: HOW TO EXPLAIN IT
Simple meaning
requirements.txt lists packages and versions so a project can be reproduced.
WHY — pip instead of guessing?
Why interviewers care about pip:
who only read docs from people who shipped.
and tied to Python work.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1requirements.txt lists packages and
versions so a project can be reproduced.
- 2Each line is typically
name==version, sometimes with extras or VCS URLs.
- 3Teams install with pip
install -r requirements.txt after creating a virtual environment.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
requirements.txt lists packages and versions so a project can be reproduced. Each line is typically name==version, sometimes with extras or VCS URLs.