While I don't know that it's difficult to teach OOP in the sense of 'objects exist' in Python, I do think it's more difficult to teach a lot of tthe concepts as

While I don't know that it's difficult to teach OOP in the sense of 'objects exist' in Python, I do think it's more difficult to teach a lot of tthe concepts associated with OOP, because the way it's done in Python is so unusual (explicit self, no real encapsulation, etc., etc.). In the introductory programming course I took, the way OOP was introduced involved writing incredibly un-idiomatic Python. So in that sense it works fine, but if you're going to ignore the 'spirit' of a language in order to use it as a teaching tool, it seems to me what language you choose doesn't really matter, so long as it has the features to shoe-horn in whatever style you want to teach people in.