Divio offers a "platform as a service" for django, Django CMS, Wagtail, and Oscar commerce projects:

https://www.divio.com/

However, they lack a basic support ticketing system on the lower-tier price plan. It is also not obvious if/how you can deploy a pre-existing app from an arbitrary Git repo, as their service is geared to use Divio project scaffolding (including their own SSO).

While the Divio service seemed appealing at first, the above issues are a bit disappointing (and it has been nearly 24 hours with no response, since I contacted their support.) Overall, Divio seems to leave a bit lacking when compared with other hosting options like WebFaction (a shared hosting provider with good Python support.)

https://webfaction.com

I'm using Passenger for serving up apps, which supports Python, Node, and Ruby. Got some basic Node support right now, but have plans to add Python soon. I haven't used Python deeply for quite a few years, so I've got a lot to catch up on to figure out what'd be best for that.

Shoot me an email and we should chat about Python support! chris @ gorails com

I really like https://platform.sh, it is popular with Drupal (PHP) projects in Europe, but it also supports python, nodejs and ruby.