Python的 描述器(Descriptor) 例子♀?♀def Itemgetter(x): def get(s): return s[x] return get class Property(object): # 必须是新式类 def __init__(self, fget): self.fget = fget def __get__(self, obj, objtype): return self.fget(obj) def __set__(self, instance, value): pass def __delete__(self, instance): passclass Test(tuple): x = Property(Itemgetter(0)) y = Property(Itemgetter(1))a = Test((1, 2))print(a.x, a.y)
