简易学生成绩管理系统Python

# -*- coding: utf-8 -*-
import random
#成绩管理系统
score={}
#录入成绩
score={"数学":{"小明":90,"刚子":80,"学霸":90},
       "语文":{"小明":92,"刚子":81,"学霸":95},
       "英语":{"小明":94,"刚子":83,"学霸":96},
       "物理":{"小明":random.randint(60,100),"刚子":random.randint(60,100),"学霸":random.randint(80,100)},
       "化学":{"小明":random.randint(60,100),"刚子":random.randint(60,100),"学霸":random.randint(80,100)},
       "生物":{"小明":random.randint(60,100),"刚子":random.randint(60,100),"学霸":random.randint(80,100)},
       }


#查询
'''
print("按照科目查询：")
course=input("请输入科目：\n")
print(score[course])

print("按照科目和姓名查询：")
course=input("请输入科目：\n")
stu_name=input("请输入学生姓名：\n")
print(score[course][stu_name])

print("按照姓名查询：")
stu_name=input("请输入姓名：\n")
for k in ["数学","语文","英语","物理","化学","生物"]:
   print(stu_name,':',score[k][stu_name])

#统计
sum=0
print("按照姓名统计：")
stu_name=input("请输入姓名：\n")
for k in ["数学","语文","英语","物理","化学","生物"]:
   sum+=score[k][stu_name]
   
print(stu_name,'的总分:',sum)
print(stu_name,'的平均分:',sum/6)

#输出所有学生总分和平均分
print("输出所有学生总分和平均分\n")
course_list=["数学","语文","英语","物理","化学","生物"]
stu_list=["小明","刚子","学霸"]
for stu in stu_list:
   total=0
   for cou in course_list:
      total+=score[cou][stu]    
   print(stu,"总分：",total,"   ",stu,"平均分：",total/6)
'''
#所有学生总分排名 
print("输出所有学生总分排名\n")
total_dict={}
course_list=["数学","语文","英语","物理","化学","生物"]
stu_list=["小明","刚子","学霸"]
#？？
for stu in stu_list:
   total=0  #？？
   for cou in course_list: 
      total+=score[cou][stu]
   total_dict[stu]=total#？？

#用匿名函数lambda函数获取字典的值
jieguo=[]
jieguo=sorted(total_dict.items(),key=lambda x:x[1],reverse=True)
print(jieguo)

#用operator.itemgetter函数获取字典的值
import operator
print(sorted(total_dict.items(), key=operator.itemgetter(1),reverse=True))