#19328 pants `mypy` checks doesn't follow exclude New discussion created by Adityav2410 I have a repository configured with pants, and i want to exclude

_test.py

files from mypy/type checks. I have tried multiple combinations/ways to provide

exclude

but none of them seems to work with

pants

. Here are few of my attempts: 1. Provide

exclude

in mypy.ini file

[mypy] exclude = _test\.py$

If i run

mypy src/

, mypy excludes my test files. But

pants check ::

runs on my test files.

pants check

however respects other flags provided in my

mypy.ini

file though, like

follow_imports

. 2. Provide

exclude

in CLI argument a.

mypy --exclude '_test\.py$' src/

This works fine as I expect.

test

files are excluded. b. ` pants -ldebug --print-stacktrace check --mypy-args "--exclude '_test.py$'" ::

Unknown flag --exclude '_test\.py$' on check scope
Use `pants help check` to get help.
10:27:07.01 [ERROR] Unknown flags --exclude '_test\.py$' on scope check
Traceback (most recent call last):
  File "/Users/aditya/Library/Caches/nce/fc197caf7591487de8182f7932e70c61b197372bb3ec4c3ed53f6a8feac3234f/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/bin/daemon_pants_runner.py", line 131, in single_daemonized_run
    runner = LocalPantsRunner.create(
  File "/Users/aditya/Library/Caches/nce/fc197caf7591487de8182f7932e70c61b197372bb3ec4c3ed53f6a8feac3234f/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/bin/local_pants_runner.py", line 106, in create
    options.for_scope(scope)
  File "/Users/aditya/Library/Caches/nce/fc197caf7591487de8182f7932e70c61b197372bb3ec4c3ed53f6a8feac3234f/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/util/memo.py", line 123, in memoize
    result = func(*args, **kwargs)
  File "/Users/aditya/Library/Caches/nce/fc197caf7591487de8182f7932e70c61b197372bb3ec4c3ed53f6a8feac3234f/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/option/options.py", line 350, in for_scope
    values = self.get_parser(scope).parse_args(parse_args_request)
  File "/Users/aditya/Library/Caches/nce/fc197caf7591487de8182f7932e70c61b197372bb3ec4c3ed53f6a8feac3234f/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/option/parser.py", line 289, in parse_args
    raise UnknownFlagsError(tuple(flag_value_map.keys()), self.scope)
pants.option.errors.UnknownFlagsError: Unknown flags --exclude '_test\.py$' on scope check

Any suggestions on how to investigate this further ? I think my

mypy.ini

file is correct because it behaves correctly with the mypy on my system(

1.1.1

), which is also the default version of pants2.16.0, which I am using. I am not sure how to use the

mypy

executable used by

pants

though. pantsbuild/pants