#!/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