How to find the start time and end time of an event in python?

Question

I have a data frame consists of column 1 i.e event and column 2 is Datetime:

Sample data

 Event   Time
    0   2020-02-12 11:00:00
    0   2020-02-12 11         


        

Answer 1

Use group by and agg to get the output in desired format.

df =pd.DataFrame([['0',11],['1',12],['1',13],['0',15],['1',16],['3',11]],columns=['Event','Time'] )
df.groupby(['Event']).agg(['first','last']).rename(columns={'first':'start-event','last':'end-event'})

Output:

Event start-event   end-event   
0      11           15
1      12           16
3      11           11