Moderate Decorators Question 79 of 228

How do you write a decorator that accepts arguments?

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

PICTURE THIS: HOW TO EXPLAIN IT

IdeaDecorators

HowWhat happens inside

Why they askShows real use

Simple meaning

Use a nested factory: the outer function takes decorator arguments and returns the real decorator, which returns the wrapper.

WHY — Decorators instead of guessing?

Why interviewers care about Decorators:

This is a process

question about Decorators.

Panels listen for order,

trade-offs, and what you would actually do on a Python project - not buzzwords.

Stay structured

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

Close cleanly

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
Use a nested factory:
the outer function takes decorator arguments and returns the real decorator, which returns the wrapper.
2
@deco(x) calls deco(x) first,
then applies that result to the function.
3
Remember wraps and to
pass *args, **kwargs through the innermost wrapper.
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.

EXAMPLE — See it in action

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

Say this line

“@deco(x) calls deco(x) first, then applies that result to the function.”

Break into beats

decoxcallsdecoxfirst

Speaking order

2987408337471632900

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

Key takeaway

Use a nested factory: the outer function takes decorator arguments and returns the real decorator, which returns the wrapper. @deco(x) calls deco(x) first, then applies that result to the function.