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交作业

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黑岩74032

#1 Created at ... [Delete] [Delete and Lock User]

原来key函数的参数是原list里的单个元素,开始以为t就是原list,然后生成映射list的

def by_name(t):
   return t[0]
def by_score(t):
    return t[1]
L = sorted(L, key=by_name)
L = sorted(L, key=by_score, reverse=True)

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