Hello, I am trying to use Moto to mock out AWS services for my unit tests. When I attempt to run the unit tests with

pants

they fail due to the error below, which appears to be due to missing

setuptools

in the

pants virtualenv

I am using

poetry version 1.2.0a2

to generate a

constraints.txt

which contains

setuptools

as a requirement Is there a reason why pants is not installing setuptools in the virtualenv?

import pkg_resources
E   ModuleNotFoundError: No module named 'pkg_resources'
/home/vagrant/.cache/pants/named_caches/pex_root/venvs/short/041f67f1/lib/python3.8/site-packages/moto/core/models.py:8: ModuleNotFoundError

I would try adding setuptools as an explicit dependency in your BUILD file

Awesome would have been a while before I figured that out. Following worked a treat:

python_tests(
   name="test"
   dependencies=["//:setuptools"],
)

Glad that worked, thanks for the tip @clean-city-64472

yeah i've hit this a few times - but if you had a single other dep in that target that did include setuptools properly you wouldn't even notice

Also worth adding that I had to use a preview version of poetry

version 1.2.0a2

as when exporting the lock file to

constraints.txt

in current versions of poetry it would not export

setuptools

it was resolved here Using the preview version of poetry introduced another issue, they have renamed where dev dependencies are stored in

pyproject.toml

to

[tool.poetry.group.dev.dependencies]

which means pants can't pick up the package until it is manually moved under

[tool.poetry.dev-dependencies]

@rich-church-77699 that poetry dep groups feature was added this week and will be going out in today's 2.6 and 2.7 release :)