circ-pandas extends pandas data for circular data.
>> import pandas as pd
>> from circpandas import circseries
>> s = pd.Series([170, -160])
>> s.circ.mean(radian=False)
-175.0>> import pandas as pd
>> from circpandas import circseries
>> s = pd.Series([45, -45])
>> s.circ.var(radian=False)
0.2928932188134524 # 1 - (1 / sqrt(2))