As an occasional python developer - I remember you could use `from future import <function>` to use python3 features in python 2.x. perhaps it would be possible to introduce a `past` package to include deprecated language features? of course this would still break compatibility in some cases, but would make it much easier to update them
> perhaps it would be possible to introduce a `past` package to include deprecated language features?
Deprecated language features are, by definition, still present and need no special incantation to miss, though they may produce Deprecation warnings to encourage you to update your code. Removed features would, I guess, be something you could do this for, except that generally the whole benefit of removing features is getting rid of the supporting code and the effort of maintaining it and it's interactions with new code.
