[GLOBAL]
pants_version = "2.16.0"
backend_packages = ["pants.backend.python"]

[source]
root_patterns = ['/lib', '/apps']

[project]
dependencies = ["my-pkg"]
name = "my-app"
requires-python = ">=3.10"
description = "An app"
version = "0.1.0"

[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"

[tool.setuptools.packages.find]
where = ["."]
include = ["myapp*"]

python_requirements(source="pyproject.toml")

apps/my-app/myapp/app.py

from mypkg.something import foo


def main():
    foo()


if __name__ == "__main__":
    main()

pants

niko@niko-ubuntu:~/tmp/pants-tests$ pants dependencies apps/my-app/myapp/app.py 
14:57:23.29 [WARN] Pants cannot infer owners for the following imports in the target apps/my-app/myapp/app.py:

  * mypkg.something.foo (line: 1)

If you do not expect an import to be inferrable, add `# pants: no-infer-dep` to the import line. Otherwise, see <https://www.pantsbuild.org/v2.16/docs/troubleshooting#import-errors-and-missing-dependencies> for common problems.
niko@niko-ubuntu:~/tmp/pants-tests$ pants dependencies apps/my-app/myapp/app.py 
niko@niko-ubuntu:~/tmp/pants-tests$ pants dependencies --transitive apps/my-app/myapp/app.py 
niko@niko-ubuntu:~/tmp/pants-tests$

pyproject.toml

pyproject.toml

pants.toml