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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.A disaster. "Records of the Historian, Confucius Aristocratic Family": "(Gong Liangru) said: 'I was killed by my teacher in the past, but now I am killed here again, and my life has already passed." " Qing Ji Yun's "Notes of Yuewei Thatched Cottage, Luanyang Summer Record 5": "Although it is violent, it is good for its aunt, but there is a reason why she will not die." Ding Ling's "Water": "If you go to the town and want to find the mayor or director, give us some food first. We were killed last night." 2. Death due to persecution or accident. "Biography of the Three Kingdoms, Wu Zhi and Sun Ce" and "In the first year of Xingping, Yuan Shu. The technique is very strange. Pei Songzhi quoted Jin Yu Pu's" Biography of Jiang Biao "with the annotation of" Jian Bu Qu Hui Ce ":" When he met Yuan Shu in Shouchun, he wept and said: "The dead father entered from Changsha to beg for Dong Zhuo, and met the Ming emperor in Nanyang. The alliance was well formed. Unfortunately, he was killed and his career did not end." " Chen Qiyuan of Qing Dynasty "Yong XianAt present, Anxi is being dismissed and under investigation, but according to the investigation results of the previous few months, Anxi is being acquitted in the first instance and the case is still under further trial.21　　十年来唐伟聪凭着坚毅不屈、踏实刻苦的工作态度，多年来破获不少贪污案件，后来晋升为总调查主任。(4) Whoever commits the crime of intentional injury and causes serious injury to a person, causing a disability of Grade II to Grade I, shall be sentenced to fixed-term imprisonment of not less than six years but not more than 10 years;杨长帆尴尬万分，也不好去抱，沈悯芮却已抬手，扒着杨长帆的胳膊盘住自己，随后接着哭。