Selecting Python version with LSP (specifically: lsp-python-ms)
reddit / emacs

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Party-Speech6467 · 2022-03-30 23:16

Hello,

I've been using Emacs for 8 years now.  I stopped fiddling with my
config maybe 3-4 years ago as I became jaded having things break all
the time for no apparent reason and getting bored fixing stuff

But now I am using LSP mode for the first time.  I think it is
amazing.  I am using

One problem: it assumes Python 2 for some reason.

Example: when mousing over a return type annotation (underlined with
red to suggest an error) it says:

    invalid syntax, return annotations require 3.x

But I want/wish to use Python 3.10.    How do i configure this?  How
do I make sure it's using the Python I want and the environment (i.e.
the libraries) I want too?

Thanks.

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yep808 · 2022-03-31 00:26

Try this: (setq python-shell-interpreter "python3")

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Party-Speech6467 · 2022-03-31 03:00

Sadly, this does not work.

I thank you for your help though.

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polaris64 · 2022-03-31 07:34

Perhaps `(setq lsp-pyright-python-executable-cmd "python3")` instead?
Each language server usually has various `lsp-mode` configuration
options such as this, so you might need to choose the correct option
for your specific server.

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astoff1 · 2022-03-31 11:20

If you activate the desired virtualenv and launch Emacs from there,
them everything should work (make sure there are no extra settings
like lsp-pyright-python-executable-cmd in place).

If the above is true for you, the next step is to look for a way to
"activate the venv" from within Emacs. There are numerous packages for
this, but I recommend buffer-env or envrc.