So I followed this way What's the easiest way to get Vim with Python 3 support?
which didn't work
and this one http://www.xorpd.net/blog/vim_python3_install.html
that did work.
the thing is each time I reboot my ubuntu, /opt/vim74/* is removed and I have to install it again.
so my question is why is it removed at each reboot and how to I make it stay?