https://www.pistack.xyz/tags/env-management/ Recent content in Env-Management on Pi Stack Hugo en-us Mon, 22 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-22-python-configuration-libraries-pydantic-dynaconf-decouple-environs-guide/ Mon, 22 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-22-python-configuration-libraries-pydantic-dynaconf-decouple-environs-guide/ <h2 id="introduction">Introduction</h2> <p>Every Python application — whether a Django monolith, a FastAPI microservice, or a CLI tool — needs configuration. The Twelve-Factor App methodology prescribes storing configuration in environment variables, but raw <code>os.getenv()</code> calls with manual type coercions become unmaintainable quickly. The Python ecosystem has evolved four mature libraries that bring structure to configuration management: <strong>Pydantic Settings</strong> (type-validated, model-based), <strong>Dynaconf</strong> (multi-source, layered), <strong>python-decouple</strong> (lightweight, env-focused), and <strong>environs</strong> (marshmallow-powered, Flask-friendly).</p>