It's super easy without any comparator thingy in Python

def comparator(a, b):
    if a.score > b.score:
        return -1
    elif a.score < b.score:
        return 1
    elif a.score == b.score:
        if a.name > b.name:
            return 1
        elif a.name < b.name:
            return -1
        else:
            return 0