[RNCTX]

There's more than one way to skin a cat.

Personally, I have moved to downloading large things (Python, Postgres by your example) as standalone apps, and only use Homebrew for small libraries and CLI tools. I think that makes more sense.

You can download all of the Mac Python versions you want from python.org and you can get Postgres from postgresapp.com which provides a nice toolbar interface to start and shutdown servers of various versions.