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AARRR:2.4
学习来源： https://blog.csdn.net/qq_22790151/article/details/109700735 https://blog.csdn.net/fei347795790/article/details/98620124 https://zhuanlan.zhihu.com/p/285676746 import pandas as pddf=pd.read_csv('user_behavior.csv')df['timestamps'