FizzBuzz kata in Python

Overview

This kata complements Clean Code: Fundamentals, Ep. 3 - Functions.

From Wikipedia:

Fizz buzz is a group word game for children to teach them about division. Players take turns to count incrementally, replacing any number divisible by three with the word "fizz," and any number divisible by five with the word "buzz."

Instructions

Canonical version

Write a program to print the first 100 FizzBuzz numbers, separated by newlines:

• if a number is divisible by three, replace it with "Fizz";
• if a number is divisible by five, replace it with "Buzz";
• numbers divisible by both three and five become "FizzBuzz."

Sample output

1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
16
...

Advanced version

Note

We recommend always starting with the canonical version, and only once you have it working proceed to the advanced version. This helps to model situations in production when we don't know all the requirements when a project starts.

Follow the same rules as the canonical version with these additional rules:

• if a number is divisible by seven, replace it with "Fuzz";
• if a number is divisible by 11, replace it with "Jazz";
• if a number is divisible by any combination of 3, 5, 7, or 11, replace it with concatenated values corresponding to each divisor: e.g., 55 becomes "BuzzJazz."

Sample output

...
86
Fizz
Jazz
89
FizzBuzz
Fuzz
92
Fizz
94
Buzz
Fizz
97
Fuzz
FizzJazz
Buzz

Prerequisites

Required:

• Git
• uv

Optional:

• GNU Make, for shorter commands. Every required task also has a direct uv command.

You do not need to install Python or pytest separately. uv installs a compatible Python version and the locked project dependencies when needed.

Set up the kata

1. Clone the repository:

   git clone https://github.com/Coding-Cuddles/fizzbuzz-python-kata.git

2. Enter the repository directory:

   cd fizzbuzz-python-kata

3. Run the starter test. Use Make when it is installed:

   make test

   Otherwise, run pytest through uv directly:

   uv run pytest

   The first run may install Python and the project dependencies. Setup is complete when pytest reports 1 passed.

   If the command fails with uv: command not found, install uv and repeat this step.

Work on the kata

1. Replace the starter assertion in test_fizzbuzz.py with the first FizzBuzz test.

2. Run the tests after each change. Use Make when it is installed:

   make test

   Otherwise, run pytest through uv directly:

   uv run pytest

   Continue when the test run passes.

Make command reference

Make is optional. Run make or make help to list these commands in the terminal.

Command	Result
make all	Run the test suite
make help	Show the command reference
make test	Run the test suite
make format	Format tracked Python files
make format-check	Check formatting without changing files
make clean	Remove generated caches