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交作业,错了的请指点

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# -*- coding: utf-8 -*-
#排序

L = [('Bob', 75), ('Adam', 92), ('Bart', 66), ('Lisa', 88)]

def by_name(t):
    return t[0]

L2 = sorted(L, key=by_name)
print(L2)

def by_score(t):
    return t[-1]

L3 = sorted(L,key=by_score,reverse=True)
print(L3)

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