Documentation: https://flask.palletsprojects.com/
Installation: https://flask.palletsprojects.com/en/1.1.x/installation/#installation
Quickstart: https://flask.palletsprojects.com/quickstart/
Installing Flask:
pip install Flask
Before running Flask, run these setup commands. FLASK_APP needs to be assigned, but FLASK_ENV and FLASK_DEBUG are optional and can be assigned for development and debugging mode, respectively.
export FLASK_APP=main.py
export FLASK_ENV=development
export FLASK_DEBUG=1
Running Flask:
cd flask
flask run
To view the main page after running Flask, open a web browser and go to http://127.0.0.1:5000/.