>>> import pandas as pd
>>> df = pd.read_csv('meteo.csv', index_col=0)

--ini-casos

>>> from meteo import vent_fluix
>>> vent_fluix(df, 20)
21
>>> vent_fluix(df, 10)
15
>>> vent_fluix(df, 30)
-1

--fi-casos

>>> vent_fluix(df.loc[:10], 18)
5
>>> vent_fluix(df.loc[::2], 17)
29