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How Do You Get the Items Not Common to Both Series a and Series B?
>> #Input
>>import pandas as pd
>>ser1 = pd.Series([1, 2, 3, 4, 5])
>>ser2 = pd.Series([4, 5, 6, 7, 8])
>> #Solution
>>ser_u = pd.Series(np.union1d(ser1, ser2)) # union
>>ser_i = pd.Series(np.intersect1d(ser1, ser2)) # intersect
>>ser_u[~ser_u.isin(ser_i)]