heroku-buildpack-scala VS heroku-buildpack-python

in fact, scala buildpack is adding it. where should i look for these var?

Heroku also provides a platform as a service https://www.heroku.com/python

There are plenty of ways to host a server. Some are easy: - https://www.pythonanywhere.com/ - https://www.heroku.com/python

Set the latest Buildpack, so you get the fix that's not yet in the latest release: heroku buildpacks:set https://github.com/heroku/heroku-buildpack-python.git

I would not recommend this for someone who wants to deploy to Heroku since it looks like poetry still is not supported with default build pack

Biildpacks can specify add-ons in their bin/release which Auto get added for an app's first deploy. As an example check our the python buildpacks https://github.com/heroku/heroku-buildpack-python/blob/main/bin/release

If the calculations are done in Python, you will need a web host that lets you run a Python interpreter. I don't know of any completely free ones like GH Pages, but paid ones are https://www.pythonanywhere.com/ and https://www.heroku.com/python. Heroku does have a free tier which you could look into, until the site gains more traffic. I am not affiliated with either site.

Have you checked out https://www.heroku.com/python ?

I am currently hosted on platform.sh and am a big fan. Before choosing them, I also considered PythonAnywhere and Heroku but I ultimately chose Platform.sh because of the simple pricing and infrastructure configuration.

Dead simple to setup and get going. Heroku is another alternative.

{ "buildpacks": [         { "url": "https://github.com/heroku/heroku-buildpack-python"         }     ] }