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Considering performance, the whole program only needs to create an instance once, so performance will not have any impact.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.Button-Unrivaled Flurry描述OL藤原沙织的家突然出现穿越时空的「源氏物语」登场的平安贵族光源氏。板栗忽见身边有丛灌木，叶子已经红透了。徐风退了一步，说：我能暖你手，但是我暖不了你心，所幸还是找别人吧。艾薇（朱迪·科默 Jodie Comer 饰）有着一段悲惨的过去，她曾经被人囚禁在地窖之中，长达十三年之久。十三年后，艾薇终于逃出魔窟，报警求援，艾利尔特（理查德·兰金 Richard Rankin 饰）和搭档丽莎（瓦伦·凯恩 Valene Kane 饰）受理了此案，他们想从艾薇的口中获取更多的线索，然而，艾薇的证言仍旧缺少着最有力的支持，那就是确凿的证据。