Get statistics for each group (such as count, mean, etc) using pandas GroupBy?

Question

I have a data frame df and I use several columns from it to groupby:

df[\'col1\',\'col2\',\'col3\',\'col4\'].groupby([\'col1\',\'co         


        

Answer 1

We can easily do it by using groupby and count. But, we should remember to use reset_index().

df[['col1','col2','col3','col4']].groupby(['col1','col2']).count().\
reset_index()