init

.flake8

+[flake8]
+max-line-length = 150

.gitignore

+.coverage
+__pycache__/
+venv/

.gitlab-ci.yml

+---
+image: debian:bookworm-slim
+
+stages:
+  - code_quality
+
+variables:
+  GIT_STRATEGY: clone
+
+code_quality:
+  stage: code_quality
+  before_script:
+    - make install-dev
+  script:
+    - . venv/bin/activate && make coverage
+    - . venv/bin/activate && make lint

.pylintrc

+[FORMAT]
+max-line-length=150

Makefile

+all: coverage lint
+
+install-dev:
+	apt-get update
+	apt-get install -y python3-venv
+	python3 -m venv venv
+	. venv/bin/activate && pip install -r requirements.txt
+
+test:
+	python3 -m pytest -v
+
+coverage:
+	coverage run --source program -m pytest tests/ -x -vv
+	coverage report --show-missing --fail-under 100
+
+lint:
+	python3 -m flake8 program.py tests
+	python3 -m pylint program.py tests

program.py

+#!/usr/bin/env python3
+"""
+pytest basics
+"""
+
+
+def myfunc(a, b):
+    """glorious function"""
+
+    return a + b
+
+
+if __name__ == "__main__":  # pragma: nocover
+    myfunc(1, 2)

requirements.txt

+# runtime
+# nothing so far
+
+# development
+coverage
+flake8
+pylint
+pytest

tests/conftest.py

+"""pytest-basics fixtures"""
+
+import os
+import shutil
+from tempfile import mkdtemp
+
+import pytest
+
+
+@pytest.fixture
+def tmpworkdir():
+    """
+    self cleaning temporary workdir
+    pytest tmpdir fixture has issues https://github.com/pytest-dev/pytest/issues/1120
+    """
+
+    cwd = os.getcwd()
+    tmpdir = mkdtemp(prefix='pytest-basics_')
+    os.chdir(tmpdir)
+
+    yield tmpdir
+
+    os.chdir(cwd)
+    shutil.rmtree(tmpdir)

tests/test_default.py

+"""tests"""
+
+import os
+
+import program
+
+
+def test_myfunc():
+    """test1"""
+
+    assert program.myfunc(1, 2) == 3
+
+
+def test_workdir(tmpworkdir):  # pylint: disable=unused-argument
+    """test2"""
+
+    print(os.getcwd())
+    assert os.getcwd().startswith("/tmp/pytest-basics_")