Get count of values across columns-Pandas DataFrame

Question

I have a Pandas DataFrame like following:

               A              B              C
0   192.168.2.85   192.168.2.85  124.43.113.22
1  192.248.8.183  192         


        

Answer 1

df['Counts'] = df[['col1','col2','col3']].groupby(['col1','col2','col3']).transform('count')