This a .vimrc && ycm_extra_config.py configuration file using by apt-get installed vim-youcompleteme
For Ubuntu Debian Users:
sudo apt-get install vim-youcompleteme vim-addon-manager
vim-addons install youcompleteme
Then config your ycm_extra_config.py PATH
let g:ycm_global_ycm_extra_conf = '~/.vim/ycm_extra_conf.py'