python 构建一个回调函数2

来源：互联网发布：分期乐软件靠谱吗编辑：程序博客网时间：2024/06/16 10:50

class Test:def __init__(self):self.f_list = [] def register(self, function):if function in self.f_list:passelse:self.f_list.append(function)def do_test(self):params = []for func in self.f_list:func(params)class Api:def __init__(self):passdef function(self, params=None):passclass SubApi1(Api):def __init__(self, test):self.test = testtest.register(self.function)def function(self, params=None):print('This is {}\'s {}'.format(self.__class__.__name__, self.function.__name__))class SubApi2(Api):def __init__(self, test):self.test = testtest.register(self.function)def function(self, params=None):print('This is {}\'s {}'.format(self.__class__.__name__, self.function.__name__))t = Test()a1 = SubApi1(t)a2 = SubApi2(t)t.do_test()

输出：

This is SubApi1's functionThis is SubApi2's function

这个例子很明显也能实现回调功能，不过与上篇文章中的例子比起来，很明显，肯定快一点，因为调用__getattribute__会涉及查询操作。同时，这个例子也没有了新式类的限制

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