How to set the python version in the LSP configuration?

[charlesnicholson]

I'd like to provide a default python version (3.13) for ruff server to use when running in my editor (neovim) though nvim-lspconfig.

I don't see anything like target-version here: https://docs.astral.sh/ruff/editors/settings/ and adding --config "target-version = 'py313'" doesn't seem to have an effect, though I'm not exactly sure where that should go. I've gone through the docs but between ruff_lsp being deprecated and this sitting at the intersection of ruff server and nvim-lspconfig I wasn't able to find an obvious solution.

Ruff's configuration in lspconfig is described here: https://github.com/neovim/nvim-lspconfig/blob/master/doc/configs.md#ruff but it says "Refer to the documentation for more details" in reference to the settings. That link takes me to https://docs.astral.sh/ruff/editors/ which lists a bunch of options but none for the target-version.

We have a ruff.toml file in our repository but because we support multiple versions of Python that share this config file, I don't think I can can put py313 there specifically.

Thanks in advance for reading and any advice you might have!

[dhruvmanila]

We've currently only exposed a certain subset of settings which can be directly altered from an editor, target-version is not one of them.

We have a ruff.toml file in our repository but because we support multiple versions of Python that share this config file, I don't think I can can put py313 there specifically.

Can you say more about this to help me understand why it isn't possible to provide the target version in the config file? Would specifying the minimum supported Python version as the target version help?

Alternatively, you could have a separate config file specifically for editor context which only specifies the target-version and provide that in configuration and utilize configurationPreference on how do you want to merge the config files i.e., in what order to merge them.

[charlesnicholson]

I think the simple answer is "because I didn't understand those options when I scanned them the first time."

Thanks for the explanation, and apologies for wasting your time.

[dhruvmanila]

No problem at all, happy to help!