renaming columns after group by and sum in pandas dataframe

Question

This is my group by command:

pdf_chart_data1 = pdf_chart_data.groupby(\'sell\').value.agg([\'sum\']).rename(
    columns={\'sum\':\'valuesum\',\'sell\' : \'sellt         


        

Answer 1

df = df.groupby('col1')['col1'].count()
df1= df.to_frame().rename(columns={'col1':'new_name'}).reset_index()