装饰器 Decorators 用来给对象动态添加一些新的行为.闭包也是这样.
>>> def my_decorator(func):
def wrapper(*args, **kwargs):
print("Before call")
result = func(*args, **kwargs)
print("After call")
return result
return wrapper
>>> @my_decorator
def add(a, b):
return a + b
>>> add(1, 3)
Before call
After call
4
