Hi team, from time to time, when I run

./pants check

command, mypy is complaining error from third-party library. Below is an example. Sometimes it goes away after re-running the command or cleaning the cache. It is annoying, any insight or suggestion?

[2023-01-02T16:05:59.896Z] .cache/pex_root/venvs/0cbc48e25cc767e871f34f3472936b3851b41d9c/bf77cd40798e75deda6009f40e4c437c9e3474cf/lib/python3.9/site-packages/torch/fx/experimental/symbolic_shapes.py:14:1: error: Cannot find implementation or library stub for module named "sympy"  [import]
[2023-01-02T16:05:59.896Z]         import sympy  # type: ignore[import]
[2023-01-02T16:05:59.896Z]     ^
[2023-01-02T16:05:59.896Z] test/unit/atom_fm/fm/pipeline/data/test_create_coarse_features_dataset.py:6: note: In module imported here:
[2023-01-02T16:05:59.897Z] .cache/pex_root/venvs/0cbc48e25cc767e871f34f3472936b3851b41d9c/bf77cd40798e75deda6009f40e4c437c9e3474cf/lib/python3.9/site-packages/xarray/__init__.py:43:1: error: Cannot find implementation or library stub for module named "importlib_metadata"  [import]
[2023-01-02T16:05:59.897Z]         from importlib_metadata import version as _version  # type: ignore[no-redef]
[2023-01-02T16:05:59.897Z]     ^

this sounds like the same issue we’ve seen in the Pants code base as well wrgt missing

pkg_resources

at times when running

check

on a subset of targets.. (usually when using

--changed-since

)

bingo! I do use

--change-since

we’ll have to look into what’s causing this, for myself I simply re-run and hope for the best 🤞 annoyingly..

😄 the same here. maybe I should not use

--changed-since

for check for now?

for me the benefit of changed since outweigh the relatively rare re-run I have to do 😉

even with the cache I assume?