#!/usr/bin/env python # coding=utf-8 """ 统计考试成绩 """ def average_score(scores): """ 统计平均分. """ score_values = scores.values() sum_scores = sum(score_values) average = round(sum_scores/len(score_values), 2) # round(a,2) 保留两位小数 return average def sorted_score(scores): """ 对成绩从高到低排队. """ score_lst = [(scores[k],k) for k in scores] sort_lst = sorted(score_lst, reverse=True) return [(i[1], i[0]) for i in sort_lst] def max_score(scores): """ 成绩最高的姓名和分数. """ lst = sorted_score(scores) #引用分数排序的函数sorted_score max_score = lst[0][1] return [(i[0],i[1]) for i in lst if i[1]==max_score] def min_score(scores): """ 成绩最低的姓名和分数. """ lst = sorted_score(scores) min_score = lst[len(lst)-1][1] return [(i[0],i[1]) for i in lst if i[1]==min_score] if __name__ == "__main__": examine_scores = {"google":98, "facebook":99, "baidu":52, "alibaba":80, "yahoo":49, "IBM":70, "android":76, "apple":99, "amazon":99} ave = average_score(examine_scores) print("the average score is:{}".format(ave)) #平均分 sor = sorted_score(examine_scores) print("list of the scores:{}".format(sor)) #成绩表 xueba = max_score(examine_scores) print("Xueba is:{}".format(xueba)) #学霸们 xuezha = min_score(examine_scores) print("Xuzha is:{}".format(xuezha)) #学渣们