关键Python基础知识

getattr

    def call_hook(self, hook_name):
        for hook in self._hooks:
            getattr(hook, hook_name)(self)

使用字符串获取对象的属性

代码

import sys
class HOOK:
    def before_breakfast(self, runner):
        print('{}:吃早饭之前晨练30分钟'.format(sys._getframe().f_code.co_name))
    def after_breakfast(self, runner):
        print('{}:吃早饭之前晨练30分钟'.format(sys._getframe().f_code.co_name))
    def before_lunch(self, runner):
        print('{}:吃午饭之前跑上实验'.format(sys._getframe().f_code.co_name))
    def after_lunch(self, runner):
        print('{}:吃完午饭午休30分钟'.format(sys._getframe().f_code.co_name))
    def before_dinner(self, runner):
        print('{}: 没想好做什么'.format(sys._getframe().f_code.co_name))
    def after_dinner(self, runner):
        print('{}: 没想好做什么'.format(sys._getframe().f_code.co_name))
    def after_finish_work(self, runner, are_you_busy=False):
        if are_you_busy:
            print('{}:今天事贼多，还是加班吧'.format(sys._getframe().f_code.co_name))
        else:
            print('{}:今天没啥事，去锻炼30分钟'.format(sys._getframe().f_code.co_name))
    def test_s(self, x):
        print(x)
class Runner(object):
    def __init__(self, ):
        pass
        self._hooks = []
    def register_hook(self, hook):
        # 这里不做优先级判断，直接在头部插入HOOK
        self._hooks.insert(0, hook)
    def call_hook(self, hook_name):
        for hook in self._hooks:
            getattr(hook, hook_name)(self)
    def run(self):
        print('开始启动我的一天')
        self.call_hook('before_breakfast')
        self.call_hook('after_breakfast')
        self.call_hook('before_lunch')
        self.call_hook('after_lunch')
        self.call_hook('before_dinner')
        self.call_hook('after_dinner')
        self.call_hook('after_finish_work')
        print('~~睡觉~~')
# from MyHook import HOOK
# from MyRunner import Runner
runner = Runner()
hook = HOOK()
runner.register_hook(hook)
runner.run()