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Connection conn = pool.get (0);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.江湖相逢 只求忘忧Nmap Idle Scan年轻有为的画家路治平有一个幸福美满的家庭，妻子党美艳温柔贤惠，儿子路小军聪明伶俐。但这一切，被路治平的研究生――年轻美貌的梅雨歌所打破。在梅雨歌的热烈追求下，路治平的防线开始动摇……