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from importlib import import_module from pkgutil import walk_packages import matplotlib import pytest # Get the names of all matplotlib submodules, # except for the unit tests and private modules. module_names = [ m.name for m in walk_packages( path=matplotlib.__path__, prefix=f'{matplotlib.__name__}.' ) if not m.name.startswith(__package__) and not any(x.startswith('_') for x in m.name.split('.')) ] @pytest.mark.parametrize('module_name', module_names) @pytest.mark.filterwarnings('ignore::DeprecationWarning') @pytest.mark.filterwarnings('ignore::ImportWarning') def test_getattr(module_name): """ Test that __getattr__ methods raise AttributeError for unknown keys. See #20822, #20855. """ try: module = import_module(module_name) except (ImportError, RuntimeError, OSError) as e: # Skip modules that cannot be imported due to missing dependencies pytest.skip(f'Cannot import {module_name} due to {e}') key = 'THIS_SYMBOL_SHOULD_NOT_EXIST' if hasattr(module, key): delattr(module, key)