Adding a command to Vim

Question

I finally decided to try out Vim, as I am getting increasingly frustrated by GUI editors. So far, I'm loving it, but I can't find any help for a issue I'm having...

I am trying to map the command :Pyrun to :!python % in Vim using cmap. The mapping shows up fine if I type :cmap. However, on typing :Pyrun, I get this error message:

Not an editor command: Pyrun.

Here is what I'm trying in .vimrc:

:autocmd FileType python :cmap Pyrun<cr> !python %<cr>
:autocmd FileType python :cmap Intpyrun<cr> !python -i %<cr>

What can I do to solve this problem?

Read the 42 pdf in this url zmievski.org/talks

Pedro Luz
– Pedro Luz

2011-07-09 02:18:31 +00:00
Commented Jul 9, 2011 at 2:18 — Pedro Luz
– Pedro Luz, Commented Jul 9, 2011 at 2:18

karoberts · Accepted Answer · 2010-01-04 18:27:33Z

45

I would try something like this in your .vimrc or your ftplugin/python_ft.vim

command Pyrun execute "!python %"
command Intpyrun execute "!python -i %"

Then :Pyrun and :Intpyrun should work

You could then map a function key to each

map <F5> :Pyrun<CR>
map <F6> :Intpyrun<CR>

answered Jan 4, 2010 at 18:27

karoberts

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1 Comment

tbhartman Over a year ago

to add the buffer-local command, use :command -buffer...:command -b does not work

Raoul Supercopter · Accepted Answer · 2010-01-05 18:51:19Z

30

I personally prefer another approach. First create a function receiving the command arguments and then create a command to call the function:

fun! DoSomething( arg ) "{{{
    echo a:arg
    " Do something with your arg here
endfunction "}}}

command! -nargs=* Meh call DoSomething( '<args>' )

So it would be like

fun! Pyrun( arg ) "{{{
    execute '!python ' . expand( '%' )
endfunction "}}}

command! -nargs=* Pyrun call Pyrun( '<args>' )

But, there's a better way to do it in Vim. Use makeprg:

makeprg=python\ %

Just type :make to run your current Python file. Use :copen to show error list.

edited Jan 5, 2010 at 18:51

answered Jan 4, 2010 at 18:28

Raoul Supercopter

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2 Comments

Chinmay Kanchi Over a year ago

Sounds like a more scalable approach. I will probably do something like this if I need more than one command executed.

Marcel Marré Over a year ago

Is there a benefit to defining the function Pyrun and the command Pyrun to take arguments when these are not actually used? I'd expect either to pass arg along to the python script, or have none and use -nargs=0 (which is also the default) in the command! line...

Rob Wells · Accepted Answer · 2010-01-04 18:37:41Z

12

G'day,

Similar to karoberts answer, I prefer the more direct:

:map <F9> :!python %<CR>

If my script is creating some output I also like to capture it in a temp file and then autoread that files content into another buffer, e.g.

:map <F9> :!python % 2>&1 \| tee /tmp/results

I then set autoread by entering :set autoread and opening the results file in another buffer

:split /tmp/results<CR>

Then I can easily see the results of the run in the buffer that auto refreshes when the results file is updated by running the script under development.

HTH

cheers,

answered Jan 4, 2010 at 18:37

Rob Wells

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Comments

Anton Abrosimov · Accepted Answer · 2022-11-12 09:44:43Z

0

With new LUA api:

vim.api.nvim_create_user_command('Hello', 'echo "Hello World!"', {})
vim.api.nvim_create_user_command('HelloLua', function ()
    print('Hello LUA!')
end, {})

NeoVIM API reference

answered Nov 12, 2022 at 9:44

Anton Abrosimov

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