E837: This Vim cannot execute :py3 after using :python
E263: Sorry, this command is disabled, the Python library could not be loaded.

60 " let Vundle manage Vundle, required
 61 Plugin 'gmarik/Vundle.vim'
 62 "Bundle 'Valloric/YouCompleteMe'
 63 Plugin 'tmhedberg/SimpylFold'
 64 Plugin 'vim-scripts/indentpython.vim'
 65 Plugin 'scrooloose/syntastic'
 66 Plugin 'scrooloose/nerdtree'
 67 Plugin 'jistr/vim-nerdtree-tabs'
 68 Plugin 'kien/ctrlp.vim'
 69 Plugin 'tpope/vim-fugitive'
 70 Plugin 'nvie/vim-flake8'
 71 "Plugin 'Lokaltog/powerline', {'rtp': 'powerline/bindings/vim/'}
 72 Plugin 'vim-airline/vim-airline'
 73 Plugin 'vim-airline/vim-airline-themes'
 74 Bundle 'klen/python-mode'
 75 Plugin 'jmcantrell/vim-virtualenv'

alternatives --install /usr/bin/python python /usr/bin/python3.5 2
alternatives --install /usr/bin/python python /usr/bin/python2.7 1

VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Jun  2 2016 10:02:17)
Included patches: 1-1868
Modified by <bugzilla@redhat.com>
Compiled by <bugzilla@redhat.com>
Huge version without GUI.