class Bygaard:
    def __init__(self):
        self._leiligheter = []

    def leggTilLeilighet(self, leilighet):
        self._leiligheter.append(leilighet)

    def finnLeilighet(self, nr):
        tempLeilighet = None

        for leilighet in self._leiligheter:
            if leilighet.hentRomnummer() == nr:
                tempLeilighet = leilighet

        return tempLeilighet