So how do we get some of these benefits if we don't use PyCharm, but use Vim? Are there standalone tools, or VIM plugins?
Having recently switched, PyCharm really does make larger projects a lot easier to refactor / manage.
Edit: Also, to actually answer your question, this is a relatively new feature so I don't think any of the VIM plugins support it yet. Jedi has had type hinting from doc strings for some time now. I'd imagine they'll update that to use this soon.