It's not what you learned that's the problem, it's what you didn't. You almost certainly missed out on things that you could very well never see again, or even know the existence of (at least for a very long time) unless you were motivated enough to go discovering stuff by yourself.
Did you ever learn about macros in Python? I doubt it, because they don't exist. Did you get introduced to metaprogramming -- the idea that you can write programs that generate more powerful programs? I doubt it, because it's hard to do that in Python. But The old 61A, which used Scheme, did just that. They added an OOP system --- yes, that's classes, inheritance, methods, constructors, etc. --- to a language that never had one, and they even taught you the basics of how it was done. 
This is something you can't even dream of doing in most (all?) languages that aren't dialects of LISP. You won't even realize it's a possibility, unless someone teaches it to you or unless you're lucky enough to stumble across it and realize its importance.
i.e., you won't know what you're missing out on.
Whereas with Python, there's not much you're missing out on: there are a ton of languages like it that you're bound to see them later in industry, if not Python itself, and learn what you would have learned anyway.