Heroku push fails repeatedly, appears to fail on installing Bonjour

Heroku push fails repeatedly, appears to fail on installing Bonjour

Are you trying to push the example app from the quickstart? Many of the
requirements you’re trying to install aren’t required at all.

I suspect that you created your requirements file outside of the recommended
virtualenv, and that twisted and bonjour-py are packages install in your
system python installation.