python（有序字典）

案例

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某编程竞赛系统，对参赛选手编程解题进行计时，选手完成题目后，把该选手解题时用时记录到字典中，以便赛后按选手名查询成绩，（答题用时越短，成绩越优）
{'LiLei':(2, 43), 'HanMeimei':(5, 52), 'Jim':(1, 39)...}
比赛结束后，需按排名顺序依次打印选手成绩，如何实现？

解析

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（1）collections.OrderedDict

d = {}

d["Jim"] = (1, 35)
d["Leo"] = (2, 37)
d["Bob"] = (3, 40)

print(d)   # 乱序

# collections.OrderedDict

from collections import OrderedDict
from time import time
from random import randint

d1 = OrderedDict()
d1["Jim"] = (1, 35)
d1["Leo"] = (2, 37)
d1["Bob"] = (3, 40)

print(d1)  # 有序

res = OrderedDict()

players = list('ABCDEFGH')
start = time()

for i in range(8):
    input()
    p = players.pop(randint(0, 7-i))  # 随机移除一位
    end = time()
    print(i+1, p, end-start)
    res[p] = (i+1, end-start)

print('-'*80)   # 分隔符
for k in res:
    print(k, res[k])