Daniel Roy Greenfeld: TIL: Loading .env files with uv run

We don't need python-dotenv, useuv runwith--env-file, and your env vars from.envget loaded.

For example, if we've got a FastAPI or Air project we can run it locally with env vars like:

You can specific different env files for different environments, like.env.dev,.env.prod, etc.

All credit goes toAudrey Roy Greenfeldfor pointingthis out to me.

https://daniel.feldroy.com/posts/til-2025-09-env-files-with-uv-run