GrupoByColumn
# import pandas
import pandas as pd
# create dataframe
df = pd.DataFrame({'Name': ['Mukul', 'Rohan', 'Mukul', 'Manoj',
'Kamal', 'Rohan', 'Robin'],
'age': [22, 22, 21, 20, 21, 24, 20]})
# print dataframe
print(df)
# use count() and sort()
df = df.groupby(['Name'])['age'].count().reset_index(
name='Count').sort_values(['Count'], ascending=False)
# print dataframe
print(df)
mnk