Is `.` / `source` a supported operation?

I want to source other files from my main .env file (namely .local.env for local development)

I have tried searching issues:

• https://github.com/theskumar/python-dotenv/issues?q=sort%3Aupdated-desc%20is%3Aissue%20load%20file%20from%20another%20file
• https://github.com/theskumar/python-dotenv/issues?q=sort%3Aupdated-desc%20is%3Aissue%20source

if this was asked / considered before, but I haven't had much luck.

Except maybe https://github.com/theskumar/python-dotenv/issues/403