在python中装饰器和普通函数有什么区别？

   def add_numbers(a, b):
       return a + b

   import time

   def timeit(func):
       def wrapper(*args, **kwargs):
           start = time.time()
           result = func(*args, **kwargs)
           end = time.time()
           print(f"{func.__name__} took {end - start} seconds to execute")
           return result
       return wrapper

   def greet(name):
       return f"Hello, {name}"

   def my_decorator(func):
       def wrapper():
           print("Before function call")
           func()
           print("After function call")
       return wrapper

   result = add_numbers(3, 5)
   print(result)

   @my_decorator
   def my_function():
       print("Inside my_function")