1# mode: run 2# tag: list, set, builtins 3# ticket: 688 4 5_set = set 6 7class TestObj(object): 8 pass 9 10def _setattr(obj): 11 """ 12 >>> t = TestObj() 13 >>> _setattr(t) is None 14 True 15 >>> t.test is None 16 True 17 """ 18 setattr(obj, 'test', None) 19 return setattr(obj, 'test', None) 20 21def _delattr(obj): 22 """ 23 >>> t = TestObj() 24 >>> t.test1 = t.test2 = True 25 >>> _delattr(t) is None 26 True 27 >>> hasattr(t, 'test1') 28 False 29 >>> hasattr(t, 'test2') 30 False 31 """ 32 delattr(obj, 'test1') 33 return delattr(obj, 'test2') 34 35def list_sort(list l): 36 """ 37 >>> list_sort([1,2,3]) is None 38 True 39 """ 40 l.sort() 41 return l.sort() 42 43def list_reverse(list l): 44 """ 45 >>> list_reverse([1,2,3]) is None 46 True 47 """ 48 l.reverse() 49 return l.reverse() 50 51def list_insert(list l): 52 """ 53 >>> list_insert([1,2,3]) is None 54 True 55 """ 56 l.insert(1, 2) 57 return l.insert(1, 2) 58 59def list_append(list l): 60 """ 61 >>> list_append([1,2,3]) is None 62 True 63 """ 64 l.append(1) 65 return l.append(2) 66 67def set_clear(set s): 68 """ 69 >>> set_clear(_set([1,2,3])) is None 70 True 71 >>> set_clear(None) 72 Traceback (most recent call last): 73 AttributeError: 'NoneType' object has no attribute 'clear' 74 """ 75 s.clear() 76 return s.clear() 77 78def set_discard(set s): 79 """ 80 >>> set_discard(_set([1,2,3])) is None 81 True 82 """ 83 s.discard(1) 84 return s.discard(2) 85 86def set_add(set s): 87 """ 88 >>> set_add(_set([1,2,3])) is None 89 True 90 """ 91 s.add(1) 92 return s.add(2) 93 94def dict_clear(dict d): 95 """ 96 >>> dict_clear({1:2,3:4}) is None 97 True 98 >>> dict_clear(None) 99 Traceback (most recent call last): 100 AttributeError: 'NoneType' object has no attribute 'clear' 101 """ 102 d.clear() 103 return d.clear() 104