pandas groupby count of rows code example
Example 1: pandas groupby counts
df[['col1', 'col2', 'col3', 'col4']].groupby(['col1', 'col2']).agg(['mean', 'count'])Example 2: groupby count pandas
df.groupby(['col1', 'col2']).size()df[['col1', 'col2', 'col3', 'col4']].groupby(['col1', 'col2']).agg(['mean', 'count'])df.groupby(['col1', 'col2']).size()