When scaffolding your next Python project, do this immediately:
The .local suffix is the most critical part. In almost every Python project setup guide (Django, FastAPI, Flask), the .gitignore file explicitly includes *.local or .env.python.local . This ensures that your personal local settings—like your local database path, a debugger port, or a temporary API key—do not accidentally sync to the repository and overwrite another developer's environment.
Add your local environment variables to the file in the format KEY=VALUE . For example: .env.python.local
Whether you are working on a small script or a massive Django application, mastering the hierarchy of environment variables is a step toward writing professional, production-ready code.
The de facto standard for loading environment files in Python is the python-dotenv library. While it doesn't natively recognize .env.python.local out of the box, you can easily implement a priority loading strategy. When scaffolding your next Python project, do this
Always include a .env.example file in your repo that lists all the keys required for the app to run, with dummy values.
If you’re working on a monorepo (e.g., a project with a React frontend and a Python backend), this clearly separates the Python config from the rest. Layered Configuration: Add your local environment variables to the file
file is where you store sensitive data (like API keys) or local configurations that shouldn't be hardcoded into your script. Create the file: In your root directory, create a file named exactly Add your variables: