什么都不做的装饰器类如下所示：
class NullDecl (object):
def __init__ (self, func):
self.func = func
for name in set(dir(func)) - set(dir(self)):
setattr(self, name, getattr(func, name))
def __call__ (self, *args):
return self.func (*args)
然后您可以正常应用它：
@NullDecl
def myFunc (x,y,z):
return (x+y)/z
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