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Use Python for data analysis: This book is a detailed version of Python's pandas package. Learn this to master some basic pandas commands. However, this is not the point, because pandas is too slow to produce a large amount of data and may collapse (I don't know if there is any improvement now-!) The point is, through studying this book, I feel a little about the data operation and am familiar with the basic data operation process. All the operations in this book can be replaced by native Python, and Pandas package is not needed. Finding feelings is very important.本剧有4个故事，①一男与二女同时交往，②一对关系开放的男同性恋，③几对情侣住在一起，④一个不愿意给出承诺的男人。刘邦点点头：很好，子房先生，你看看还有什么事情需要准备或者加强的吗？张良道：我们自身的准备已经很充足了，不必担心，现在我们需要做的就是在荥阳一带坚守，和楚军对峙，给韩元帅换取征伐河北诸侯的时间。从前，有一位国主司马浩天，他仁民爱物，深受百姓爱戴。但是奸相窃国，使他战死沙场，王后也坠落山崖。少主玉龙和忠将赵毅之子赵羽幸得赵毅和高人相救，死里逃生。十五年后，玉龙夺回王位，得知母后尚在人间，便微服寻访母后的下落，同时暗查百姓之疾苦，为官之良莠。途中，发生了一系列故事……最后，玉龙和赵羽还是没有找到太后，他们循着太后留下的踪迹，继续游历天下。A normal http request, as follows:Let's go on to discuss design patterns. In the previous article, I finished five creative patterns. At the beginning of this chapter, I will talk about the following seven structural patterns: adapter pattern, decoration pattern, agent pattern, appearance pattern, bridging pattern, combination pattern and meta-sharing pattern. The adapter pattern of the object is the origin of various patterns. Let's look at the following figure: