I'm a big fan of Pythonista. When I do a search for a topic Google often takes me to a post on the user forums. There's also a Slack channel, but Google can't see it so anything useful in there is much harder to access hence I don't use it. I don't want to encourage content migrating to a proprietary silo. That's why I don't mind Reddit, for all it's faults it's at least still an actual web site.