Question

代码如下，与课程相应：

def new_decorator(func):

    def wrap_func():
        print("code here before executing func")
        func()
        print("func() has been executed")

    return wrap_func()

@new_decorator
def func_needs_decorator():
    print("this function is in need for a decorator")

func_needs_decorator()

其结果如下：

code here before executing func
this function is in need for a decorator
func() has been executed
Traceback (most recent call last):
  File "decorators.py", line 17, in <module>
    func_needs_decorator()
TypeError: 'NoneType' object is not callable

但是，如果我从代码中删除最后一行（第17行，func_needs_decorator（）），则不会出现错误消息，结果如下：

code here before executing func
this function is in need for a decorator
func() has been executed

非常感谢您提示最后一行导致问题的提示：）

Answer 1

好，我知道了;）

代替

 return wrap_func()

应该是

 return wrap_func

.....

TypeError：“ NoneType”对象不可调用/装饰器

1 个答案: