编辑代码

def vote(voter):
    box = dict.fromkeys([item[0] for item in voter], 0)
    for item in voter:
        box[item[0]] += 1
    return box


if __name__ == '__main__':
    voter = [
        ['a', 'b'],
        ['a'],
        ['b'],
        ['a'],
        ['b'],
        ['c'],
    ]

    box = vote(voter)
    print(box)