class Flota:
    def __init__(self, nom): 
        self.nom = nom
        self.__autos = []

    def afeg_vehicle(self, b):
        for i in range(len(self)): 
            if self.__autos[i].id == b.id:
                self.__autos[i].vel = b.vel
                return
        self.__autos.append(b)
        
    def __getitem__(self, i):
        return self.__autos[i]
        
    def __len__(self):
        return len(self.__autos)