why pytest breaks on warnings._OptionError: invalid module name: 'pandas.core.common'?

[dz0]

any ideas why on Bitbucket pipeline we get:

pytest pytests -k "simul or metric_inference_test or fixes" --tb=short --durations=20  --numprocesses 4 --dist load -Wignore::pandas.core.common.SettingWithCopyWarning 

Traceback (most recent call last):
  File "/opt/conda/bin/pytest", line 11, in <module>
    sys.exit(console_main())
  File "/opt/conda/lib/python3.8/site-packages/_pytest/config/__init__.py", line 185, in console_main
    code = main()
  File "/opt/conda/lib/python3.8/site-packages/_pytest/config/__init__.py", line 143, in main
    config = _prepareconfig(args, plugins)
  File "/opt/conda/lib/python3.8/site-packages/_pytest/config/__init__.py", line 318, in _prepareconfig
    config = pluginmanager.hook.pytest_cmdline_parse(
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_hooks.py", line 265, in __call__
    return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_manager.py", line 80, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_callers.py", line 55, in _multicall
    gen.send(outcome)
  File "/opt/conda/lib/python3.8/site-packages/_pytest/helpconfig.py", line 100, in pytest_cmdline_parse
    config: Config = outcome.get_result()
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_result.py", line 60, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_callers.py", line 39, in _multicall
    res = hook_impl.function(*args)
  File "/opt/conda/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1003, in pytest_cmdline_parse
    self.parse(args)
  File "/opt/conda/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1283, in parse
    self._preparse(args, addopts=addopts)
  File "/opt/conda/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1191, in _preparse
    self.hook.pytest_load_initial_conftests(
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_hooks.py", line 265, in __call__
    return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_manager.py", line 80, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_callers.py", line 60, in _multicall
    return outcome.get_result()
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_result.py", line 60, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/opt/conda/lib/python3.8/site-packages/pluggy/_callers.py", line 34, in _multicall
    next(gen)  # first yield
  File "/opt/conda/lib/python3.8/site-packages/_pytest/warnings.py", line 136, in pytest_load_initial_conftests
    with catch_warnings_for_item(
  File "/opt/conda/lib/python3.8/contextlib.py", line 113, in __enter__
    return next(self.gen)
  File "/opt/conda/lib/python3.8/site-packages/_pytest/warnings.py", line 52, in catch_warnings_for_item
    apply_warning_filters(config_filters, cmdline_filters)
  File "/opt/conda/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1606, in apply_warning_filters
    warnings.filterwarnings(*parse_warning_filter(arg, escape=True))
  File "/opt/conda/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1579, in parse_warning_filter
    category: Type[Warning] = warnings._getcategory(category_)  # type: ignore[attr-defined]
  File "/opt/conda/lib/python3.8/warnings.py", line 262, in _getcategory
    raise _OptionError("invalid module name: %r" % (module,)) from None
warnings._OptionError: invalid module name: 'pandas.core.common'

[nicoddemus]

Seems your environment is missing pandas.core.common, the error comes from warnings._getcategory(), configured by -Wignore::pandas.core.common.SettingWithCopyWarning.

I see the module exists, https://github.com/pandas-dev/pandas/blob/master/pandas/core/common.py, so check if pandas is properly installed in the environment you are running pytest in.

[dz0]

it used to work for whole year, and today broke :/

[The-Compiler]

I don't see how pytest would be the culprit here. You will likely get an ImportError if you just run python3 -c "import pandas.core.common" too.

What pytest could do in this case is to show less confusing output, see #8096.

[dz0]

the problem was with conda cannels (intel) changes: some package versions changed and confused environment.

sorry for bothering :]