Answers for "count after group by"

count entries groupby

df.groupby(['col1']).size()

Posted by: Guest on September-09-2021

how to get count by using group by in python

df[['col1', 'col2', 'col3', 'col4']].groupby(['col1', 'col2']).agg(['mean', 'count'])

Posted by: Guest on November-20-2020

Code answers related to "count after group by"