Did you know polars can execute fizzbuzz?

I didn’t know too, until I tried

As a huge fan of the Polars data analysis library, I often find myself testing its capabilities to their limits. For example, I wanted to see whether I could implement the FizzBuzz challenge using Polars alone. No Python functions, just pure Polars. I will admit that I initially thought this would be beyond Polars’ capabilities. Spoiler alert, I was wrong.

As a refresher on what FizzBuzz is, I refer you to my other post titled Can you do FizzBuzz in rust?

Implementing fizzbuzz in polars

Here is the complete code that implements FizzBuzz using pure Polars.

import polars as pl

(pl.int_range(1, 101, eager=True)
 .to_frame('Num')
 .with_columns(pl.when(pl.col('Num').mod(15) == 0)
               .then(pl.lit('FizzBuzz'))
               .when(pl.col('Num').mod(3) == 0)
               .then(pl.lit('Fizz'))
               .when(pl.col('Num').mod(5) == 0)
               .then(pl.lit('Buzz'))
               .otherwise(pl.col('Num'))
               .alias('Num')
              )
 )

shape: (100, 1)

Num
str
"1"
"2"
"Fizz"
"4"
"Buzz"
…
"Fizz"
"97"
"98"
"Fizz"
"Buzz"

Check out my Polars course to learn more!