Injecting configuration and compiling...
[1G [1G-----> Python app detected
[1G ! The latest version of Python 3 is python-3.6.2 (you are using python-3.7.3, which is unsupported).
[1G ! We recommend upgrading by specifying the latest version (python-3.6.2).
[1G Learn More: https://devcenter.heroku.com/articles/python-runtimes[1G-----> Installing python-3.7.3
[1G-----> Installing pip
[1G-----> Installing requirements with pip
[1G /tmp/buildpacks/04_buildpack-python/bin/steps/pip-install: line 10: /app/.heroku/python/bin/pip: No such file or directory