类型错误：'NoneType'对象不可调用装饰符。

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()

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

然而，如果我删除代码中的最后一行（第17行，func_needs_decorator()），就不会出现错误信息，结果如下。

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

我将感谢你的提示，为什么最后一行会导致这个问题:)

Answer 1

好吧，我想明白了；)

而不是

 return wrap_func()

应该有

 return wrap_func

.....