code: def state_full(self):
          
      
          if self.is_valid_state:
              return STATES[self.country.upper()].get(self.state.upper())
docs: unicode, the full name of the object's state.
          
          >>> address = Address(country='US', state='CO')
          >>> address.state
          u'CO'
          >>> address.state_full
          u'Colorado'