Quote:
remote: -----> Python app detected
remote: ! Requested runtime (python-3.7) is not available for this stack (heroku-18).
remote: ! Aborting. More info: https://devcenter.heroku.com/articles/python-support
The messages explain it all; the version of Python you requested (3.7) is not available where you are deploying the app.
Your options:
- Check with the host to see what versions they will support.
- Alter your application so it will work with your host.
- Change hosts to someone who will support what you need/
You may not like the answer, but it is still valid. I presume that the answers you got on Stack Overflow are similar.