Benchmarking Functions with Python Decorators

Libraries: If you want this lab, consider one of these libraries.
Cloud

Benchmarking Functions with Python Decorators

Decorators are just syntactic sugar, but they are one of the most interesting features of Python. Being able to add functionality or features to existing functions and classes without modifying the original source can be incredibly valuable and allows for leveraging code reuse in a way that many object-oriented languages simply can't. In this hands-on lab, you'll be writing decorator functions that allows for adding benchmarking and logging to functions, with an option for passing in a file name to log to. Completing this lab will demonstrate that you know how to write and utilize function decorators in Python.

Get started Contact sales

Lab Info

Level

Advanced

Last updated

Sep 23, 2025

Duration

1h 0m

Challenge

Implement the log Decorator
The log decorator needs to print (or write to a file) a line in the following format:
```
running: [wrapped_function_name] args: [positional_arguments] kwargs: [keyword_arguments]
```
The function should allow for an optional file_name argument so that it can be used like this:
```
@log(file_name="log_file.txt")
def some_functions(a, b):
    pass
```
Challenge

Implement the benchmark Decorator
The benchmark decorator needs to print (or write to a file) a line in the following format:
```
benchmark: [wrapped_function_name] duration: [total_runtime_in_seconds]
```
The function should allow for an optional file_name argument so that it can be used like this:
```
@benchmark(file_name="benchmarks.txt")
def some_functions(a, b):
    pass
```

About the author

Pluralsight Skills

Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

Real skill practice before real-world application

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Learn by doing

Engage hands-on with the tools and technologies you’re learning. You pick the skill, we provide the credentials and environment.

Follow your guide

All labs have detailed instructions and objectives, guiding you through the learning process and ensuring you understand every step.

Turn time into mastery

On average, you retain 75% more of your learning if you take time to practice. Hands-on labs set you up for success to make those skills stick.