idxmax() doesn't work on SeriesGroupBy that contains NaN

Question

Here is my code

from pandas import DataFrame, Series
import pandas as pd
import numpy as np
income = DataFrame({\'name\': [\'Adam\', \'Bill\', \'Chris\', \'Dave\         


        

Answer 1

Just apply a lambda function on the groups like so:

grouped.apply(lambda x: x.max())