What does __str__ do?
PICTURE THIS: DJANGO MVT
Simple meaning
__str__ returns the informal string used by str() and print().
WHY — Dunder Methods instead of guessing?
Why interviewers care about Dunder Methods:
people 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:
- 1__str__ returns the informal
string used by str() and print().
- 2It should be readable
for end users and logs.
- 3If you omit it,
Python falls back to __repr__, which is often the ugly default object address.
- 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
__str__ returns the informal string used by str() and print(). It should be readable for end users and logs.