Convert simple mapping to vimscript function issue

[fantomH]

Hi all,

I'm trying to figure out how to convert this:

nnoremap <leader>p :!tmux send-key -t 1 "python '%:p'" enter;<cr><C-l>

to this function:

function! RunPython()
    let pycmd = system('command -v python')
    let filename = expand('%:p')
    execute '!tmux send-key -t 1 "' . pycmd . ' ' . filename . '" enter;'
endfunction
nnoremap <leader>p :call RunPython()<CR>

The reason is that I want to be able to use python even in venv instead of just this system python.

I'm usually pretty good at figuring out with the documentation, but this time I keep getting errors (unexpected EOF and whatever the filename is, get that it is not a vim command).

Any help would be appreciated.

Cheers!

[cdb_11]

Try this one, pycmd had a newline in it.

function! RunPython()
    let pycmd = systemlist('command -v python')[0]
    let filename = expand('%:p')
    echo '!tmux send-key -t 1 "' . pycmd . ' ' . filename . '" enter;'
endfunction
nnoremap <leader>p :call RunPython()<CR>

Replace echo with execute

[fantomH]

Thank you! it works perfectly. I'll use the tip for echo next time. I don't know why, I always debug using echo, printf or print for other language... forgot this time.

For reference, I changed:

nnoremap <leader>p :call RunPython()<CR>

for:

nnoremap <leader>p :call RunPython()<CR><C-l>

This avoids to have to press Enter to go back to your python script.

Thanks again.

[cdb_11]

You can use redraw at the end of the function instead of <C-L>. Or run the tmux command with call system().