如何使用装饰器和线程返回函数值

have this code

有这个代码

import threading
def Thread(f):
    def decorator(*args,**kargs):
        print(args) 
        thread = threading.Thread(target=f, args=args)
        thread.start()
        thread.join()
    decorator.__name__ = f.__name__
    return decorator      

@Thread
def add_item(a, b):
    return a+b


print(add_item(2,2))
import threading
def T