pandas groupby count only one column code example
Example 1: group by count dataframe
df.groupby(['col1','col2']).size()Example 2: pandas groupby counts
df[['col1', 'col2', 'col3', 'col4']].groupby(['col1', 'col2']).agg(['mean', 'count'])df.groupby(['col1','col2']).size()df[['col1', 'col2', 'col3', 'col4']].groupby(['col1', 'col2']).agg(['mean', 'count'])