I need some tips on getting python-lsp-server working with eglot:
reddit / emacs

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zeta_00 · 2022-01-30 22:57

File mode specification error: (void-variable company-backends)

\[jsonrpc\] Server exited with status 1

Error in post-command-hook (#\[0
"\\303\\304\\301\\242\\305#\\210\\300\\306!\\205 r\\211q\\210

?\\205 \\307\\310\\311 \\")\\207" \[#<buffer
[app.py](https://app.py)\> (#0) eglot--managed-mode remove-hook post-
command-hook nil buffer-live-p apply eglot--connect eglot--guess-
contact\] 4\]): (error "\[eglot\] -1: Server died")

&#x200B;

I'm pretty sure that I have all the required dependencies installed,
but for some reason eglot breaks when I open a python file?

Here's the python lsp that I'm using:

[https://github.com/python-lsp/python-lsp-
server](https://github.com/python-lsp/python-lsp-server)

Any tips on how to fix this error?

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sebhoagie · 2022-01-31 23:34

We need to know what is your configuration first.  I use Eglot with
that server and "it just works" .

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zeta_00 · 2022-02-01 00:36

;;-------------------------------------------------

(use-package eglot

:defer t

:hook  (python-mode . eglot-ensure))

;;-------------------------------------------------

(use-package company

:defer t

:hook  (python-mode . company-mode))

;;-------------------------------------------------

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zeta_00 · 2022-02-01 00:39

I use to have that just works when using the older Python language
server(palantir)(it's last commit is 2020 so it's not being maintained
anymore), but I installed the Python LSP Server from the above link
and it's not working out-of-the-box?

Is there some extra steps that are required for eglot to find this
Python Language Server?

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sebhoagie · 2022-02-01 01:58

Based on the config above and the error message with company
backends... Try setting company to ":demand t" so it is loaded right
away.
If that works, you might need to play a bit with use-package to get
things loaded in order.

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zeta_00 · 2022-02-01 02:32

Thanks and here are the error messages that I'm getting:

\[stderr\]     import pkg\_resources

\[stderr\] ModuleNotFoundError: No module named 'pkg\_resources'

File mode specification error: (void-variable company-
backends)\[jsonrpc\] Server exited with status 1Error in post-command-
hook (#\[0 "\\303\\304\\301\\242\\305#\\210\\300\\306!\\205 r\\211q\
\210?\\205 \\307\\310\\311 \\")\\207" \[#<buffer app.py> (#0) eglot--
managed-mode remove-hook post-command-hook nil buffer-live-p apply
eglot--connect eglot--guess-contact\] 4\]): (error "\[eglot\] -1:
Server died")

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zeta_00 · 2022-02-01 02:34

I installed the Python package setuptools, but I'm not sure why I'm
still getting the missing pkgs\_resources error?

Maybe setuptools needs to be set to a different version?

I'm guessing that I'm missing a dependency, but I'm not sure.

This is getting frustrating.

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zeta_00 · 2022-02-01 03:16

Searching for program: No such file or directory, python-lsp-server.

(add-to-list 'eglot-server-programs '(python-mode . ("python-lsp-
server")))

\^ This helped me make it past the other error, but now Eglot can't
seem to find the python-lsp-server, I'm not sure how to do this
the nix way, because in nix the binary hash id changes.

At least some progress.

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-xylon · 2022-11-05 20:09

I know this is very late but:

1. The name of the program (as seen by the command line) is "pylsp"
and not "python-lsp-server", so you should use the former.
2. Ensure your "pylsp" is available to emacs (e.g. if installed in a
virtualenv make sure emacs is using/running that venv). I like to
install these kind of transversal programs every project is going to
be using (such as pylsp, black and such) with pipx so I don't have to
worry about venvs.

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zeta_00 · 2022-11-05 23:16

Thanks.