>>> from representatives import quant_votes

>>> d =  {'Anna': 3, 'Arnau':0, 'Enric': 5, 'Josep': 1,
... 'Pol': 1, 'Roger': 2, 'Zaira': 0, 'nuls': 1}
>>> quant_votes(d, 'Enric')
(True, 5)
>>> quant_votes(d, 'Pau')
(False, -1)