10.216.113.172 - - [04/Sep/2009:02:57:16 -0700]

10.211.47.159 - - [03/Sep/2009:22:19:49 -0700]

I have multible datetimes in a column of dataframe of pandas and I have to subtract them and convert them in to UTC time and then sort them. #10.216.113.172 - - 04/Sep/2009:02:57:16 -0700 have to subtract 0700 after subtract 10.216.113.172 - - 03/Sep/2009

My dataFrame is right here :

df['timestamp].strptime it has str : 04/Sep/2009:02:57:16 -0700,03/Sep/2009:22:19:49 -0700 in it but I have to subtract them first -0700 like that. after subtract it will go back to the previous day

I tried to use datetime.strptime but is not desired output