E471: Argument required

[ubaldot]

I am running Vim 8.2 on Windows 10. The command :SlimeSendCurrentLine works well, but the :SlimeSend, :SlimeSend0 and :SlimeSend1 give me the error E471: Argument required.

The only things related to vim-slime on my .vimrc are the following:

let g:slime_python_ipython = 1
let g:slime_target = "vimterminal"
let g:slime_cell_delimiter = "# %%"

Any hint on how to fix the problem?

[jpalardy]

Hi @Barzi2001

Do you know what line/function is causing a problem?

If you give me a step-by-step, I can try to reproduce (minx the windows 10 part)

[ubaldot]

Actually all give me problems. You can try for example this:

# %%
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

A = 3
B = 4
C = A + B

# %%

[jpalardy]

Hi @Barzi2001

what I did:

• new docker container, ubuntu:latest image
• put (only) your config in .vimrc
• install vim, ipython3, vim-slime
• start vim, :terminal, ipython3

• sent text with ctrl-c ctrl-c
• picked existing terminal (no 1)

…

I skipped the imports, not sure it was relevant to this problem

[jpalardy]

# ipython3 --version
7.13.0

🤔

if you have a better step-by-step, I'm willing to try that. It might be a problem with versions too.

A docker recipe would be appreciated, if possible. (or instructions for specific versions)

[ubaldot]

OK! Perhaps for Windows users the best would be to work via Docker. I haven't a better step-by-step, I think that such a minimal example above should be enough.

Yeah, the ipython version may be a problem,

PS C:\Users\yt75534> ipython3.exe --version
7.22.0

[jpalardy]

This certainly looks like it's breaking on the vim-slime side (rather than anything having to do with Windows and/or ipython)

:help e471 says

                                                        E471
  Argument required

This happens when an Ex command with mandatory argument(s) was executed, but
no argument has been specified.

which isn't exactly enlightening… 😐

If you want to sprinkle the plugin code with echom and let me know what you find, I can try to help.

[ubaldot]

I am not sure I can use this feature, but I run :echom followed by :SlimeSend0 obtaining the same e471 error again with no more info (I also checked in :messages). I also tried to uninstall/reinstall the plugin but it didn't help.

Unrelated: every time I try to use vim-slime I have to run :SlimeConfig manual and select the target window of my slimes. I am aware that in specify a default terminal in my .vimrc, but what shall I write if I have a cryptical message like this? What is the terminal name and the session name?!

[jpalardy]

Hi @Barzi2001

I use tmux because I can default to

let g:slime_target = "tmux"
let g:slime_default_config = {"socket_name": "default", "target_pane": "{last}"}
let g:slime_dont_ask_default = 1

and {last} "just works"…

if there's a vimscript way to inspect and (intelligently) pick the vim-terminal … it's not part of the plugin 😩

[ubaldot]

UPDATE: If I run e.g. :SlimeSend0 1000, then 1000 is "slimed" to the REPL. I am not sure, but it seems the argument to be passed to :SlimeSend0 is what is in between the delimiters (# %% in my case) and it seems that the command :SlimeSend0 simply fails at picking it?

[jpalardy]

:SlimeSend0 and :SlimeSend1 are not overly publicized. They take strings as argument and directly send those over (no relation to buffer content or selection)

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.