# import necessary libraries
import pandas as pd

# create sample series
fruits = pd.Series(['apple', 'banana', 'mango', 'apple',
                    'mango', 'apple', 'apple', 'banana'])
values = pd.Series([1, 2, 3, 4, 5, 6, 7, 8])

# use pandas groupby() function 
grouped = values.groupby(fruits)

# calculate mean of grouped values
grouped_mean = grouped.mean()

# print the results
print(grouped_mean)