#: E713 if not X in Y: pass #: E713 if not X.B in Y: pass #: E713 if not X in Y and Z == "zero": pass #: E713 if X == "zero" or not Y in Z: pass #: E713 if not (X in Y): pass #: Okay if x not in y: pass if not (X in Y or X is Z): pass if x is not y: pass if X is not Y is not Z: pass if TrueElement.get_element(True) == TrueElement.get_element(False): pass if (True) == TrueElement or x == TrueElement: pass assert (not foo) in bar assert {"x": not foo} in bar assert [42, not foo] in bar assert not (re.search(r"^.:\\Users\\[^\\]*\\Downloads\\.*") is None) assert not('name' in request)or not request['name']