pylsp+ruff sometimes very slow to update an inline error

[dstromberg]

This is an example - this sort of problem doesn't happen every time, not even most of the time, but it does happen enough to shake my confidence in the errors I'm getting:

│ return (
 │ │ LockingPassthrough(NewProduct, lock)     ■ Undefined name `Status`
│ │ .filter(NewProduct.deleted_on.is_(None))
│ │ .join(subquery, Pipeline.product_id == NewProduct.id)
│ )

As you can see, there's nothing about "Status" on that line. It's been like this for about 10 or 20 minutes. I had Status in there, but I corrected the problem; sadly, the red error never went away.

My question is twofold:

1. For the short term, is there command/keystroke to make pylsp forget what it thinks it knows and reexamine the code? That would probably make this easier to deal with.
2. For the long term, is there a way to make pylsp+ruff stop giving spurious (outdated) errors?

Thanks!

[dstromberg]

I'm using:
ruff 0.0.261

...but I just realized my venv didn't have much in it, so I'll give this some time to see if it resurfaces with that fix.

[dstromberg]

It's still happening.

Here are the pypi packages in my mason virtualenv:

attrs                  23.1.0     /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
black                  23.3.0     /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
cattrs                 22.2.0     /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
click                  8.1.3      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
docstring-to-markdown  0.12       /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
exceptiongroup         1.1.1      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
jedi                   0.17.2     /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
lsprotocol             2023.0.0a1 /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
mypy-extensions        1.0.0      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
packaging              23.1       /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
parso                  0.7.1      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
pathspec               0.11.1     /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
pip                    23.0.1     /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
platformdirs           3.5.1      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
pluggy                 1.0.0      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
pydocstyle             6.3.0      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
python-jsonrpc-server  0.4.0      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
python-language-server 0.36.2     /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
python-lsp-jsonrpc     1.0.0      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
python-lsp-ruff        1.4.0      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
python-lsp-server      1.7.2      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
ruff                   0.0.267    /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
setuptools             67.6.1     /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
snowballstemmer        2.2.0      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
tomli                  2.0.1      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
ujson                  5.7.0      /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip
wheel                  0.40.0     /data/home/dstromberg/.local/share/nvim/mason/packages/python-lsp-server/venv/lib/python3.10/site-packages pip

[dstromberg]

BTW, if I run:
:!ruff %
...then things look as expected.

[jhossbach]

IMO this sounds more like an editor problem than a problem of the LSP. Do you use the latest version of neovim?
Also can you try to play with debounce_text_changes to see if this helps avoiding this problem?

[dstromberg]

I was on neovim 0.8.2, from Ubuntu's repo.

Now I'm on:
NVIM v0.9.0
Build type: RelWithDebInfo
LuaJIT 2.1.0-beta3
...from an appimage.

I'll have to give it some time to see if that helps.

[jhossbach]

Were you able to update and test?