def test_idxmapping_key_len_check(self):
        try:
            MultiDimensionalMapping(initial_items=self.init_item_odict)
            raise AssertionError('Invalid key length check failed.')
        except __HOLE__:
            pass
dataset/ETHPy150Open ioam/holoviews/tests/testndmapping.py/NdIndexableMappingTest.test_idxmapping_key_len_check