Python Flask installation
There is nothing special. You install flask as you'd install any other Python package. Using some kind of virtual envrionment is recommended here too.
virtualenv venv -p python3
source venv/bin/activate
pip install flask
Install using uv
uv is avery fast package and project manager. After installing uv you can do the following.
$ uv init flask-demo
$ cd flask-demo
$ uv add flask
Rename the main.py file to app.py to make it easier to follow along.
$ uv run flask run