My original comment was "Python is losing to Ruby, Go, and JavaScript". From purely a job market perspective I can't see why'd you'd invest time in learning Python over Ruby and JS. For non-blocking I/O people are going with JS instead of things like tornado. From a pure performance perspective, Go wins out over most/all interpreted languages.
Python is only winning a few niche markets like numerical computation, statistics. and biology...which most developers are not in. If you are trying to learn a language to get a job, you're probably not wanting to look at small niche industries to work in.
Of course you can build billion dollar companies in any language, but that wasn't the question or comment being discussed.