One: function decoration function
def wrapFun(func): def inner(a, b): print('function name:', func.__name__) r = func(a, b) return r return inner @wrapFun def myadd(a, b): return a + b print(myadd(2, 3))
Two: function decoration class
def wrapClass(cls): def inner(a): print('class name:', cls.__name__) return cls(a) return inner @wrapClass class Foo(): def __init__(self, a): self.a = a def fun(self): print('self.a =', self.a) m = Foo( ' xiemanR ' ) m.fun()
Three: class decoration function
class ShowFunName(): def __init__(self, func): self._func = func def __call__(self, a): print('function name:', self._func.__name__) return self._func(a) @ShowFunName def Bar(a): return a print (Bar( ' xiemanR ' ))
Four: Class decoration
class ShowClassName(object): def __init__(self, cls): self._cls = cls def __call__(self, a): print('class name:', self._cls.__name__) return self._cls(a) @ShowClassName class Foobar(object): def __init__(self, a): self.value = a def fun(self): print(self.value) a = Foobar( ' xiemanR ' ) a.fun()