exercise in python 3 with wrapper : I have issue with following exercise:https://pythonprogramming.net/decorators-intermediate-python-tutorial/
Here is code I wanted to write:
    
    def add_wrapping(item):
        def wrapped_item():
            return 'a wrapped up box of {}'.format(str(item()))
        return wrapped_item

    @add_wrapping
    def new_gpu():
        return 'a new Tesla P100 GPU!'
    print(new_gpu())

Here is my code:

    def add_wrapping(item):
        def wrapped_item():
            return "a wrapped up box of {}".format(str(item()))
        return wrapped_item()
    @add_wrapping
    def new_gpu():
        return "new car!"
    print(new_gpu())

I work in PyCharm, here is error that it gives me:
line 17, in <module>
    print(new_gpu())
TypeError: 'str' object is not callable

I am stuckk at this point, can't figure what went wrong, any help is appreciated!