blocking callbacks (also known as synchronous callbacks or just callbacks)
deferred callbacks (also known as asynchronous callbacks)
那么，在python中如何实现回调函数呢，看代码：
复制代码 代码如下:
def my_callback(input):
print "function my_callback was called with %s input" % (input,)
def caller(input, func):
func(input)
for i in range(5):
caller(i, my_callback)
![[Web front-end] Démarrage rapide de Node.js](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
