I learned python 2 by reading an earlier version of the book. I already knew how to program in general (20+ years experience), and the book was a little basic. Still, as an intro to a language (I was new to python entirely) it was worthwhile. I also like the author's writing style.

I was going to say that they're free (or pay what you want), but that's apparently no longer the case (or won't be as of tomorrow). I support the author in this decision, but I guess you have 12 hours to skim the book and see if it's worthwhile and then buy it if you like what you see.