As a relative newb, who got his first real experience with AS3 (flash games), I've put some serious thought into this issue. I've seen that job chart come up a number of times, and it's true that python is bigger now. But clicking on relative gives a startlingly opposite picture:
For now, since I've gotten a programming job (yay!) at an iOS shop, I've gotta work on Obj. C. But when the time comes to really get good at a higher level language, it's hard to say which way I'll go.
I've also noticed that python listings on Indeed.com are often optional automation skills for sysadmin or build coordinator jobs rather than pure programming. These are valid jobs but hardly comparable to the dev jobs listed for other languages e.g. "Ruby Developer".
http://www.indeed.com/jobtrends?q=python%2C+ruby&l=&...
For now, since I've gotten a programming job (yay!) at an iOS shop, I've gotta work on Obj. C. But when the time comes to really get good at a higher level language, it's hard to say which way I'll go.