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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.Responsibility chain mode:你这小子竟然编排起我来了。Barbie's younger sister Chelsea is trying to celebrate her 7th birthday but her birthday is skipped due to the international date line.I. About ProjectionThe unbearable Youmei and Qinglan made great moves. Fan Shang gave Yu Ying a mobile phone and Yu Ying told him that he wanted to change his mobile phone number. Yu Ying couldn't help shedding tears when he looked at the text message sent by Yi Shang. Koko was furious when he learned that Qinglan was beaten. Youmei lied that he had never started to beat Qinglan. The whole family stood by Youmei to blame Qinglan.