# import necessary libraries
import pandas as pd
# define your series
ser1 = pd.Series([1, 2, 3, 4, 5])
ser2 = pd.Series([3, 4, 5, 6, 7])
# convert both series into sets
set1 = set(ser1)
set2 = set(ser2)
# apply difference() both ways
result1 = set1.difference(set2)
result2 = set2.difference(set1)
# print the results
print(*result1, sep = '\n')
print(*result2, sep = '\n')