Hi everyone, I have trouble making

pants

work. I am getting the following error.

15:49:05.79 [ERROR] 1 Exception encountered:

Engine traceback:
  in `lint` goal

ProcessExecutionFailure: Process 'Find interpreter for constraints: CPython>=3.9' failed with exit code 1.
stdout:

stderr:
No supported version of Pip is compatible with the given targets:
cp311-cp311-macosx_14_0_arm64 interpreter at /Users/achrafmamdouh/.pyenv/versions/3.11.10/bin/python3.11
cp312-cp312-macosx_14_0_arm64 interpreter at /Users/achrafmamdouh/Desktop/studio/.venv/bin/python

I am on

MacOS M3

using

pyenv

, and here is my toml.

[GLOBAL]
pants_version = "2.22.1"
backend_packages = [
  "pants.backend.build_files.fmt.black",
  "pants.backend.python",
  "pants.backend.python.lint.docformatter",
  "pants.backend.python.lint.black",
  "pants.backend.python.lint.flake8",
  "pants.backend.python.lint.isort",
  "pants.backend.python.typecheck.mypy",
]

[source]
root_patterns = ["/"]

[python]
interpreter_constraints = ["==3.12.*"]
enable_resolves = true
resolves = { python-default = "python-default.lock" }

[python-bootstrap]
search_path = ["<PYENV_LOCAL>"]

Huh, I’m not sure where that

CPython>=3.9

is coming from, but it’s a very bad idea to write an unbounded interpreter constraint. Your

"==3.12.*

is better, but even that could be trouble in some cases.

It still fails.

stderr:
No supported version of Pip is compatible with the given targets:
cp312-cp312-macosx_14_0_arm64 interpreter at /opt/homebrew/Cellar/python@3.12/3.12.7_1/Frameworks/Python.framework/Versions/3.12/bin/python3.12
cp313-cp313-macosx_14_0_arm64 interpreter at /opt/homebrew/Cellar/python@3.13/3.13.0_1/Frameworks/Python.framework/Versions/3.13/bin/python3.13

Updated

pants.toml

[python]
interpreter_constraints = ["==3.12.7"]

[python-bootstrap]
search_path = ["/opt/homebrew/bin"]

No this very much shouldn’t happen

Thanks @happy-kitchen-89482 for your help. I appreciate that. Ok so

pants test ::

and

pants check ::

all work, but

pants lint ::

still unfortunately still fails even after regenerating the lock file using

pants generate-lockfiles

.

And you regenerated the lockfile for

black

, to use your interpreter?

How can I find/(re)generate the lockfile for tools (e.g.,

black

)?

This is covered here

Great it works.