vimrc RunDoctests()

function! RunDoctests()
        let fname = expand('%:p')
        :w<cr>                :vne
        :set ft=python
        :set buftype=nofile
        :setlocal noswapfile
        :exec ':silent r!python2 -m doctest -f' fname
endfunction
autocmd FileType python nnoremap T :call RunDoctests()<cr>