>>> from candidates import can_most_voted

>>> dic = {'Joan Pere Jorbina Palau':570, 
... 'Niceto Brunildo Fornells':679, 'Mariona Puig Peix': 701,
... 'Adriana de Tor Quemada': 451}
>>> can_most_voted(dic)
'Mariona Puig Peix'

>>> dic['Mariona Puig Peix'] = 200
>>> can_most_voted(dic)
'Niceto Brunildo Fornells'
>>> dic['Lee Kung Fu'] = 1000
>>> can_most_voted(dic)
'Lee Kung Fu'
>>> can_most_voted({})
''