Hi there, I'm just getting started with splitting up a single-project monorepo into multiple projects, which each subproject defining its requirements using a

pyproject.toml

file & the

poetry_requirements

target. Right now I'm just trying to get tests to run (via

pants test src/python/subproject1::

) for one of the subprojects, but I'm getting the following error on an import from a third-party library (

dropbox

, but I think this is likely to happen with a number of third-party dependencies):

ModuleNotFoundError: No module named 'pkg_resources'

I see this resolved issue in the pantsbuild github which seems very similar, but specific to gunicorn. I tried adding

setuptools

to the pyproject.toml file for the subproject and re-ran

generate_lockfiles

before trying the tests again but didn't notice any change. I also tried adding

python_sources(
    dependencies=["3rdparty/python#setuptools"]
)

to the BUILD file for the

subproject1

folder (not sure this even makes sense), and also didn't see any changes. Would anyone be able to point me in the right direction?

You need to override dependencies for dropbox. For example

poetry_requirements(
    name="reqs",
    overrides={
        "dropbox": {"dependencies": [":reqs#setuptools"]},
    },
)

https://www.pantsbuild.org/docs/python-third-party-dependencies#requirements-with-undeclared-dependencies

ah cool, I was just stumbling into that!