L = [('Bob', 75), ('adam', 92), ('Bart', 66), ('Lisa', 88)] def by_name(t): return t[0].lower() L2 = sorted(L, key=by_name) print(L2) def by_score(t): return -t[1] #返回分数的负值。这样就不需要逆序了 L3=sorted(L,key=by_score) print(L3)
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