Python? That doesn't make sense. Anyone who appreciates Perl would surely choose Ruby over Python.
Although I suppose the way things are headed in a few years that might become... JavaScript, of all things. The theory that the world truly ended in 2012 becomes more appealing every day.
Also, there is Crystal, for compiling something very similar to Ruby, to native.
As far as I know, it's still the best option there is for quickly building a MVP on the web if one isn't building a SPA.
If you had told me 5 years ago that I'd be recommending PHP as an alternative vs. RoR I wouldn't have believed you, but the PHP world has improved in ways that I wouldn't have thought possible.