pyproject.toml

Replaces requirements.txt

To install pip install -e .

my_project/
├── pyproject.toml
└── my_package/
    ├── __init__.py
    └── main.py

   1 # my_package/main.py
   2 
   3 def say_hello():
   4     print("Hello from the world of TOML-configured Python!")
   5 
   6 if __name__ == "__main__":
   7     say_hello()

[build-system]
requires = ["setuptools>=61.0"]
build-backend = "setuptools.build_meta"

[project]
name = "my_hello_app"
version = "0.1.0"
dependencies = []

[project.scripts]
# This creates a command 'hello-world' that runs say_hello()
hello-world = "my_package.main:say_hello"

[tool.setuptools]
packages = ["my_package"]

Other example

make install
make check
make clean

hello_project/
├── pyproject.toml
├── Makefile
├── .gitignore
├── src/
│   └── main.py
└── tests/
    └── test_main.py

pyproject.toml

[project]
name = "hello_world_example"
version = "0.1.0"
dependencies = []

[project.optional-dependencies]
dev = [
    "coverage",
    "ruff",
]

[tool.ruff]
target-version = "py310"
lint.select = ["E", "F", "I"]
line-length = 88

[tool.coverage.run]
source = ["src"]
branch = true

[tool.coverage.report]
show_missing = true

Makefile

VENV = .venv
PYTHON = $(VENV)/bin/python3
PIP = $(VENV)/bin/pip
RUFF = $(VENV)/bin/ruff
COVERAGE = $(VENV)/bin/coverage

.PHONY: venv install lint format test coverage clean check

$(VENV)/bin/activate:
        python3 -m venv $(VENV)
        $(PIP) install --upgrade pip

venv: $(VENV)/bin/activate

install: venv
        $(PIP) install -e ".[dev]"

lint: venv
        $(RUFF) check .

format: venv
        $(RUFF) format .

test: venv
        $(PYTHON) -m unittest discover tests

coverage: venv
        $(COVERAGE) run -m unittest discover tests
        $(COVERAGE) report
        $(COVERAGE) html

check: format lint coverage

clean:
        rm -rf $(VENV) .ruff_cache htmlcov .coverage
        find . -type d -name "__pycache__" -exec rm -rf {} +

.gitignore

.venv/
__pycache__/
*.py[cod]
.coverage
htmlcov/
.ruff_cache/
.DS_Store

src/main.py

def get_hello_message(name="World"):
    return f"Hello, {name}!"

if __name__ == "__main__":
    print(get_hello_message())

tests/test_main.py

import unittest
from src.main import get_hello_message

class TestHelloWorld(unittest.TestCase):
    def test_default_greeting(self):
        self.assertEqual(get_hello_message(), "Hello, World!")

    def test_custom_greeting(self):
        self.assertEqual(get_hello_message("Gemini"), "Hello, Gemini!")

if __name__ == "__main__":
    unittest.main()