feat: pyo3 support module prefix + naming

[andyscott]

Adds support for specifying the module name + module prefix for pyo3 extensions.

[UebelAndre]

Thanks! Just one question

[UebelAndre]

One more question for you guys!

[UebelAndre]

Can you explain how this interacts with imports? Is imports = ["."] required? What happens if a subdirectory is added? Does it make the module not imported?

[ags-openai]

Import values behave just like they do for regular Python library import paths under Bazel.

I reworked the test to use the default import path (the repo root) instead of the package's dir. The python test case is adjusted accordingly so it looks like the rest of the test cases in the pyo3 extension workspace.

[ags-openai]

What happens if a subdirectory is added? Does it make the module not imported?

As in something like imports = ["some_dir"]? It'd try to strip this off of the prefix of the module path for python. Since the shared lib is being placed in a directory with a module path prefix turned to dirs it would effectively try to trim the module name prefixes this PR is adding support for.

[ags-openai]

@UebelAndre gentle ping 🙏

[UebelAndre]

Sorry for the delay! Last thing, can you add an additional variant that uses imports? Similar to:

rules_rust/extensions/pyo3/test/string_sum/BUILD.bazel

Lines 16 to 27 in cdaf15f

	pyo3_extension(
	name = "string_sum_import",
	srcs = ["string_sum_import.rs"],
	edition = "2021",
	imports = ["."],
	)
	py_test(
	name = "string_sum_import_test",
	srcs = ["string_sum_import_test.py"],
	deps = [":string_sum_import"],
	)

[ags-openai]

Yes. But before we embark on another cycle of review: is there any additional feedback I can address this time through?

[UebelAndre]

Thanks!

[ags-openai]

How do we get this merged?

[UebelAndre]

Hey, I was on break and there was a CI outage. Rebased and added to the queue!

[andyscott]

Thanks!

…

On Wed, Jan 21, 2026, 17:39 UebelAndre ***@***.***> wrote: *UebelAndre* left a comment (bazelbuild/rules_rust#3726) <#3726 (comment)> Hey, I was on break and there was a CI outage. Rebased and added to the queue! — Reply to this email directly, view it on GitHub <#3726 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AACLYW2BU466MEVPVOGXE3L4IAS5LAVCNFSM6AAAAACL6LA3UOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTOOBSGAYTGNRXGA> . You are receiving this because you authored the thread.Message ID: ***@***.***>