def deco(func):
    def wrapper(*arg, **kw):
        print('decorator arg: %s' % arg_of_decorator)
        print('call %s in decorator' % func.__name__)
        return func(*arg, **kw)
    return wrapper

@deco
def test():
    pass

#等價於 test=deco(test)，即在@修飾器名稱後直接加(被修飾的函式名)
#因此，帶引數的修飾器可以如下實現：


def decorator(arg_of_decorator):
    def deco(func):
        def wrapper(*arg, **kw):
            print('decorator arg: %s' % arg_of_decorator)
            print('call %s in decorator' % func.__name__)
            return func(*arg, **kw)
        return wrapper
    return deco


@decorator("修飾器引數")
def test1():
    pass
#等價於 test1 = decorator("修飾器引數")(test1) = deco(test1)
#修飾器的引數已經傳遞進去