[FIXED] How to set FLASK_ENV inside config file?

Issue

TL;DR

I don't want to export my variables every time I log on. I want them in my config.

From the docs

Using the environment variables as described above is recommended. While it is possible to set ENV and DEBUG in your config or code, this is strongly discouraged.

How do I do it anyway? How is it 'possible'?

MORE - What I've Tried

I have a flask.cfg with FLASK_ENV='development'. I run flask run and I get development printed. But the production server has already started. It ignores the following:

app.config.from_pyfile("flask.cfg")

print(f"{app.config['ENV']}") => development

This is in a personal project of no consequence. That's why I am ignoring best practices for convenience.

Solution

What about this: install python-dotenv package, create a .flaskenv file in your project root folder and add, for example, this:

FLASK_APP=app.py (or whatever you named it)
FLASK_ENV=development (or production)

Save. Do flask run.

Answered By - no use for a name