The vast majority of the changes should be automated. The hardest thing is probably going to be where your API subtly changes in its restrictions because of effectively edge cases that PyDantec has fixed. If for some reason you stored your IDs as strings and therefore your API had the ID field as a string, but your user was just like pumping them into your API as integers - that's going to break. So I feel sorry for those people. My biggest like request would be if your user try PyDantech V2 as soon as possible.