Help with pynvim for neovim needed

[Marek Stepanek]

Hello all,


could some patient soul could help me out? I am at the point to give up.

macOS Sonoma 14.4 Intel (2018)

Homebrew newest upgrade

vimr 0.44.0

I am not Python coder (old school: Perl!). So forgive me my innocence. I suppose the modul pynvim should be installed outside of Homebrew?

First what is in my config-file?

~/.config/nvim/init.vim

let g:python3_host_prog='/usr/local/bin/python3'
let g:loaded_python_provider = 0
set pyxversion=3


In Vimr or Neovim :checkhelth I get:

## Python 3 provider (optional)

- INFO: Using: g:python3_host_prog = "/usr/local/bin/python3"
- INFO: Executable: /usr/local/bin/python3
- ERROR: Command error (job=20, exit code 1): `'/usr/local/bin/python3' -c 'import

stderr: Traceback (most recent call last): File "<string>", line 1, in <module>M
- INFO: Python version: 3.12.2
- INFO: pynvim version: unable to load neovim Python module
- ERROR: pynvim is not installed.

Error: unable to load neovim Python module
- ADVICE:

- Run in shell: /usr/local/bin/python3 -m pip install pynvim

But this advice to install with pip (or pip3) is meanwhile deprecated. My attempts to install it, little excerpt look like this:

$ which python
python not found

$ which python3
/usr/local/bin/python3
$ which pip3
/usr/local/bin/pip3

$ brew uninstall python3 # if I remember well with -force
$ brew install python3
$ ll `which python3`
lrwxr-xr-x 1 mstep admin 42B 24 Mar 18:20 /usr/local/bin/python3@ -> ../Cellar/pyt...@3.12/3.12.2_1/bin/python3
$ ll `which pip3`
lrwxr-xr-x 1 mstep admin 39B 24 Mar 18:20 /usr/local/bin/pip3@ -> ../Cellar/pyt...@3.12/3.12.2_1/bin/pip3

$ /usr/local/bin/python3 -m pip install pynvim
error: externally-managed-environment

$ brew install python3
× This environment is externally managed
╰─> To install Python packages system-wide, try brew install
xyz, where xyz is the package you are trying to
install.

If you wish to install a non-brew-packaged Python package,
create a virtual environment using python3 -m venv path/to/venv.
Then use path/to/venv/bin/python and path/to/venv/bin/pip.

If you wish to install a non-brew packaged Python application,
it may be easiest to use pipx install xyz, which will manage a
virtual environment for you. Make sure you have pipx installed.

note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.

Same error with:
$ pip3 install pynvim
$ pip3 install --upgrade pynvim

I tried to copy the pynvim from python3.11 to python3.12 (don't shout on me!)

$ cp -r python3.11/site-packages/pynvim python3.12/site-packages
$ cp -r python3.11/site-packages/pynvim-0.5.0.dist-info python3.12/site-packages

Ok! that means I have to create a virtual environment for python-packages!
Where you suggest to put the python packages? What path to use for the virtualenv of python?

I tried with:

$ brew install pipx
$ pipx install pynvim
No apps associated with package pynvim or its dependencies. If you are attempting to install a library, pipx should
not be used. Consider using pip or a similar tool instead.

Please a little hint! I would be very grateful for any help


marek

[Enno]

It is not clear what is to be achieved, but for Python support in Vim one should ensure that `!python3 -V`, and `:python3 import sys; print(sys.version)")` coincide. For Neovim, I'd refer to the experts at https://github.com/neovim/neovim/issues/

[Romain Lafourcade]

This mailing list is dedicated to Vim. If you use Neovim, use their official support channels.

[Marek Stepanek]

Thx Enno for the reply. I meanwhile could resolve the problem. I activated a virtual environment for Python with the help of https://python.land/virtual-environments/virtualenv#google_vignette

Here shortly the commands I entered (if somebody is looking for this problem):

being the the folder of /usr/local/Cellar

mkdir -p python/myenv
virtualenv python/myenv
created virtual environment CPython3.11.8.final.0-64 in 793ms
creator CPython3macOsBrew(dest=/usr/local/Cellar/python/myenv, clear=False, no_vcs_ignore=False, global=False)
seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/Users/mstep/Library/Application Support/virtualenv)
added seed packages: pip==24.0, setuptools==69.1.0, wheel==0.42.0
activators BashActivator,CShellActivator,FishActivator,NushellActivator,PowerShellActivator,PythonActivator

source python/myenv/bin/activate

pip3 install --upgrade pynvim
Collecting pynvim
Using cached pynvim-0.5.0-py2.py3-none-any.whl.metadata (469 bytes)
Collecting msgpack>=0.5.0 (from pynvim)
Downloading msgpack-1.0.8-cp311-cp311-macosx_10_9_x86_64.whl.metadata (9.1 kB)
Collecting greenlet>=3.0 (from pynvim)
Using cached greenlet-3.0.3-cp311-cp311-macosx_11_0_universal2.whl.metadata (3.8 kB)
Using cached pynvim-0.5.0-py2.py3-none-any.whl (45 kB)
Using cached greenlet-3.0.3-cp311-cp311-macosx_11_0_universal2.whl (271 kB)
Downloading msgpack-1.0.8-cp311-cp311-macosx_10_9_x86_64.whl (87 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 88.0/88.0 kB 2.4 MB/s eta 0:00:00
Installing collected packages: msgpack, greenlet, pynvim
Successfully installed greenlet-3.0.3 msgpack-1.0.8 pynvim-0.5.0

/usr/local/bin/python3 -m pip install pynvim

/usr/local/Cellar/python/myenv/bin $ pip3 install --upgrade pynvim
Requirement already satisfied: pynvim in /usr/local/Cellar/python/myenv/lib/python3.11/site-packages (0.5.0)
Requirement already satisfied: msgpack>=0.5.0 in /usr/local/Cellar/python/myenv/lib/python3.11/site-packages (from pynvim) (1.0.8)
Requirement already satisfied: greenlet>=3.0 in /usr/local/Cellar/python/myenv/lib/python3.11/site-packages (from pynvim) (3.0.3)

What I did not understand, why this pynvim is under Python3.11 and not under active Python3.12. I have had to adapt my init.vim with:

let g:python3_host_prog='/usr/local/bin/python3' => let g:python3_host_prog='/usr/local/bin/python3.11'

VimR and Neovim is working now.


Thx for your patience


marek

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[Enno]

> What I did not understand, why this pynvim is under Python3.11 and not under active Python3.12.

Maybe the pip command was installed under Python 3.11. Afterwards python3 was updated to Python 3.12, but pip still relies on python3.11 ?

For example, here

less `which pip` | head -2

shows

#!/usr/bin/python3.11