""" Correct syntax for variable annotation that should fail at runtime in a certain manner. More examples are in test_grammar and test_parser. """ def f_bad_ann(): __annotations__[1] = 2 class C_OK: def __init__(self, x: int) -> None: self.x: no_such_name = x # This one is OK as proposed by Guido class D_bad_ann: def __init__(self, x: int) -> None: sfel.y: int = 0 def g_bad_ann(): no_such_name.attr: int = 0