def test_del_keyerror(): dt = Dictree() dt[1, 2, 3] = 1 dt[1, 2, WILDCARD] = 2 raises_keyerror(lambda: dt.__delitem__((1, 2, 4)), (1, 2, 4)) raises_keyerror(lambda: dt.__delitem__((1, 2)), (1, 2))