HEROES = [
    { "id": 1, "name": "Wolfgang" },
    { "id": 2, "name": "Andreas" },
    { "id": 3, "name": "Frank" },
    { "id": 4, "name": "Thomas" },
    { "id": 5, "name": "Barbara" },
    { "id": 6, "name": "Robert" },
    { "id": 7, "name": "Raphael" },
    { "id": 8, "name": "Lucia" },
    { "id": 9, "name": "Gregor" },
]


def get_hero(id=None):
    if id:
        try:
            hero = next(x for x in HEROES if x["id"] == id)
            return { "id": hero["id"], "name": hero["name"] }
        except StopIteration:
            return 'Hero not found', 404
    

def get_heroes():
    if HEROES:
        return HEROES
    else:
        return 'No heroes available', 404