>>> from dades_meteo import actualitza_dades

>>> d = {'Roses':[12.5,18.8],'Sant Celoni':[7.5,8.3],
... 'Barcelona':[15.2,19]}

>>> lmed = [('Girona',13),('Sant Celoni',7.2),('Barcelona',19.2)]

>>> actualitza_dades(d,lmed)
>>> d == {'Girona':[13,13],'Roses':[12.5,18.8],'Sant Celoni':[7.2,8.3],'Barcelona':[15.2,19.2]}
True

>>> d = {'Roses':[12.5,18.8],'Sant Celoni':[7.5,8.3],
... 'Barcelona':[15.2,19],'Tarragona':[13.4,18.8],'Granollers':[11,14.2]}

>>> lmed = [('Vic',8.2),('Roses',21),('Barcelona',16),('Vic',8),('Castellfollit de la Roca',6.1),('Vic',9.3),('Granollers',10.4)]

>>> actualitza_dades(d,lmed)
>>> d == {'Vic':[8,9.3], 'Castellfollit de la Roca':[6.1,6.1],'Roses':[12.5,21],'Sant Celoni':[7.5,8.3],'Barcelona':[15.2,19],'Tarragona':[13.4,18.8],'Granollers':[10.4,14.2]}
True