sort by a column with group by in pandas code example

Example: sort values within groups pandas dataframe

import pandas as pd

df = pd.DataFrame({'A':[1, 2, 3, 4, 5, 6],
                   'B':[0, 1, 2, 0, 1, 2]})

df.groupby('B').apply(lambda x: x.sort_values('A', ascending = True))