• wistcomrenasupka

Descargarmonica85concrack







January 15, 2020 I want to get the date (when it is first seen) the date of the last seen. I tried : df[0] df['First Seen'].max() but nothing. A: I think need compare by first column and first max value per group, aggregate DateFrame.first_valid_index, but maybe is better create GroupBy.first, so working solution is: df1 = df.groupby('User ID', group_keys=False).first() print (df1) Date User ID 0 2019-10-01 1029 1 2019-10-01 1029 2 2019-10-01 1029 3 2019-10-01 1029 4 2019-10-01 1029 5 ac619d1d87


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