I found the answer by myself - PTVS doesn't support this feature, however there is a plugin, which can be downloaded here, which supposedly fixes this issue: http://visualstudiogallery.msdn.microsoft.com/644b4359-5eeb-4ba5-9374-78a8507761f0
However, after further inspection, it is broken and doesnt work half as good as pycharm's autocomplete. Most of the time it popups a message saying 'no suggestions' which becomes seriously annoying getting that msg after every single letter. Bottomline - it is broken.