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In the above code, we use three functions, order500, order200, orderNormal to handle its own business logic, If the current own function cannot handle things, We pass it to the following function to handle it. By analogy, Until there is a function that can handle him, Otherwise, the responsibility chain mode will leave the chain directly, telling that it cannot be processed and throwing an error prompt. Although the above code can be used as the responsibility chain mode, we can see from the above code that the Order500 function depends on functions such as Order200, so there must be this function, which also violates the open-closed principle in object-oriented. Let's continue to understand writing flexible and detachable responsibility chain nodes.昭和时代的名曲在音乐剧中复活！！Alter database example set single_user with rollback immediate有一天，在校生新谷贞一遇见穿着现在已被停用的黑水手服的不可思议的女学生。那位女学生称自己正是“旧校舍的幽灵”夕子，并希望贞一协助她找出自己的死因与真相。等待他们的究竟是如何的未来呢？该剧讲述了家庭主妇苟吉祥因为追查丈夫死因还自己清白，加入巡捕房。遇到了傲慢公子毛儒毅等侦探，从此主妇励志大翻身，不仅侦破一个个悬疑案件，还收获了爱情。2. As a Cheng Yuan who has been engaged in machine learning for more than two years, seeing the computer series you recommended also thinks it is very unreliable. I have read most of the books you recommended. In particular, novice readers are not recommended to read "Introduction to Algorithms" and "Data Mining: Concepts and Technologies". These two books are thick and heavy. Although the content is also good, you will not know the year of the monkey when you finish reading them. What does a novice need? It's getting started! Secondly, have you really finished reading Python Core Programming? This book is not for Python newcomers. It is very thick and difficult. It is very unfriendly to newcomers. And if you just want to be AI, then many parts of this book don't need to be used. Is web development and Django framework really necessary for our AI engineers? No. Xiao Bai has no distinction between key and non-key points in a book. He spent a lot of time learning unnecessary knowledge, which really does more harm than good. Giving guiding and targeted recommendations is responsible recommendation.After that, she learned new skills and found a new job. Her life against the attack did not lose at all to the eldest woman in "My First Half Life". And children, also don't have to be afraid of parents quarrelling, but more and more sunshine.