>>> from datetime import date
>>> from astronautes import Astronauta
>>> from edat_futura import edat_futura

--ini-enunciat
>>> edat_futura(Astronauta('Fina', date(2000, 2, 12), 360), date(2034, 2, 11))
33
>>> edat_futura(Astronauta('Kim', date(2012, 5, 10), 340), date(2073, 12, 23))
61

--fi-enunciat
>>> edat_futura(Astronauta('Roger', date(2012, 3, 31), 560), date(2042, 5, 13))
30
>>> edat_futura(Astronauta('Maria', date(2012, 5, 10), 324), date(2052, 12, 23))
40
>>> edat_futura(Astronauta('Delfi', date(2003, 3, 31), 435), date(2034, 2, 11))
30