>>> import pandas as pd
>>> from electro import electro2

>>> df = pd.read_csv('consum_elect.csv', dtype = {'Codi_Postal': str})

--ini-electro2
>>> se1 = electro2(df, 2)
>>> type(se1)
<class 'pandas.core.series.Series'>
>>> se1 = se1.apply(lambda x: round(x, 2))
>>> se1
Sector_Economic
Serveis           55.90
Residencial       38.53
Indústria          5.47
No especificat     0.10
Name: Valor, dtype: float64

--fi-electro2
>>> se2 = electro2(df, 3)
>>> se2 = se2.apply(lambda x: round(x, 2))
>>> type(se2)
<class 'pandas.core.series.Series'>
>>> se2
Sector_Economic
Serveis           56.63
Residencial       37.79
Indústria          5.47
No especificat     0.11
Name: Valor, dtype: float64