Show HN: A Python Language Server, Mypy-compatible

27 davidhalter 5 6/27/2025, 12:33:25 PM zubanls.com ↗
Having created Jedi in 2012, I started ZubanLS in 2020 to advance Python tooling. It understands Mypy config files and passes >95% of the relevant Mypy tests. AMA.

Comments (5)

Grikbdl · 58m ago
It's great to see so much innovation in this area. But, seeing that you will charge for this - what will you provide that won't be covered by free alternatives in e.g. Ty (Astral) or Pyre (Meta), which similarly seem to be "mypy but in rust and maybe lsp features"?
drcongo · 50m ago
Last time I tried ty and pyre they weren't particularly great with a Django codebase, I'm sure ty will get there at some point, but if this handles django-stubs without any extra faffing, that's one potential selling point.

I did have the same thought as you at first though, and only carried on reading when I spotted that it was from the author of Jedi.

Grikbdl · 40m ago
Both ty and Pyre are in development, so maybe the answer is just "this works and they don't". But they do promise to work eventually, like end of year if I recall correctly. I don't know what makes Django special in this regard though - is it the ORM models that don't work well with the typing spec or..?
ehutch79 · 10m ago
There's a lot of magic in Django, and yes that's particularly around the ORM.

The foreign key stuff and missing reverse relations in types a big issue, but there's other stuff like warning about class Meta: being incompatible because you're inheriting an abstract model.

I'm yet to find a good guide on how to handle typing a django project, even if only to get vscode to do autocomplete.

drcongo · 24m ago
I don't know anywhere near enough to answer that with any confidence I'm afraid. I'd like to hear op's opinion though.