Lupyter is a Lua kernel built on ipykernel. Tab-completion is available but documentation lookup is still a work in progress.
In most cases it's enough to pip install with LUA_DIR pointing
to your Lua installation but if Lua is installed
in your PATH you may not need LUA_DIR. You can always add
-v after pip install if your Lua install isn't found and you
want to see a list of the directories searched.
[LUA_DIR=/path/to/your/lua_root] pip install .
If your Python is in a weird place the kernelspec might not be visible to Jupyter.
You can confirm that the kernelspec was install correctly with:
jupyter kernelspec list
If the kernelspec isn't in the list check which paths Jupyter can see and make sure your kernelspec was installed to one of them:
jupyter --paths
You can manually install to one of those paths with:
jupyter kernelspec install data_kernelspec --name lupyter --prefix ...