How to provide pyi type stubs for sub-packages

[DanielT]

Hi,

I'm implementing a Python module using pyo3. I've grouped the features into sub-modules using the add_submodule API in pyo3.
Obviously this means there is no counterpart to these modules in the filesystem.
Now I would like provide pyi files with type information for each of my submodules, but I don't know which files I should put where.

Initially, before a added a sub-module, I used the "pure rust" project layout with a single my_project.pyi file. I'm pretty sure I should switch to the "mixed" layout now, but so far I haven't been able to get it to work.

Are there any examples I could follow? I would appreciate any help!

[messense]

See https://maturin.rs/project_layout.html#adding-python-type-information

[messense]

For real world example, see https://github.com/pyca/cryptography/tree/main/src/cryptography/hazmat/bindings/_rust

[DanielT]

Thank you!
The cryptography example showed me what I was missing: It's possible to have stub-only modules, i.e. directories that only contain .pyi files