这周我闲着没事，就花了几个小时写了一个学生成绩管理系统，就是实现最基本的增删改查，利用字典和列表来存储学生信息，在这里给出源代码，供大家参考！

student_list = []
while True:print("===============欢迎进入学生管理系统==================")print("=======            1.添加学生              =========")print("=======            2.查找学生              =========")print("=======            3.删除学生              =========")print("=======            4.修改学生信息          ==========")print("=======            5.退出系统              ==========")print("=====================================================")pd = input("请输入你所要执行的功能：")if pd=='1':while 1:print("==================添加学生================")name = input("请输入学生的姓名：")age = input("请输入学生的年龄：")id = input("请输入学生的学号：")tel = input("请输入学生的联系电话：")math = int(input("请输入学生的数学成绩："))chinese = int(input("请输入学生的语文成绩："))english = int(input("请输入学生的英语成绩："))# 学生的成绩信息scores = {}scores["math"] = mathscores["chinese"] = chinesescores["english"] = english# 构建一个字典 来存储学生信息dict = {}dict["name"] = namedict["age"] = agedict['id'] = iddict["tel"] = teldict["scores"] = scores#将学生信息添加到列表中student_list.append(dict)print("=============================================")print("========      1.继续添加学生信息     ==========")print("========      2.返回上一层           ==========")print("==============================================")pd_01 = input("请输入序号>>>")if pd_01 == "1":continueelif pd_01 == '2':breakelse:print("请输入正确的序号！")continueelif pd == '2':while True:print("====================查找学生================")print("=======    1.查找所有的学员信息       =======")print("=======    2.根据姓名查找的学员信息    ========")print("=======    3.根据学号查找的学员信息     =======")print("=======    4.返回上一层                =========")print("================================================")pd_02 = input(">>>")if pd_02 == '1':if student_list == None:print("还没有学员信息！")for student in student_list:print(student)elif pd_02 == '2':if student_list == None:print("还没有学员信息！")name = input("请输入学生姓名：")flag = 0for student in student_list:if student["name"] == name:flag = 1print(student)#学生的总成绩for i,j in student["scores"].items():print(i,j)sum_scores = sum(student["scores"].values())#平均成绩average_scores = sum_scores/len(student["scores"].values())print("这个学生的总成绩为：{}".format(sum_scores))print("这个学生的平均成绩为：{}".format(average_scores))breakif flag == 0:print("没有找到这个学生")elif pd_02 == '3':if student_list == None:print("还没有学员信息！")student_num = input("请输入学生的学号：")flag = 0for student in student_list:if student["id"] == student_num:flag =1print(student)breakif flag == 0:print("没有找到这个学生！")elif pd_02 == '4':breakelse :print("请输入正确的序号")continueelif pd == '3':while True:print("=================删除学生====================")print("======       1.按姓名删除学生信息     ========")print("======       2.按学号删除学生信息     ========")print("======       3.返回上一层            =========")print("=============================================")pd_03 = input("请输入选择>>>")if pd_03 == '1':student_name = input("请输入要删除的学生姓名")flag = 0for student in student_list:if student["name"] == student_name:flag = 1student_list.remove(student)print("删除成功！")breakif flag == 0:print("没有找到这个学生的信息，无法删除！")elif pd_03 == '2':student_num = input("请输入要删除的学生姓名")flag = 0for student in student_list:if student["name"] == student_num:flag = 1student_list.remove(student)print("删除成功！")breakif flag == 0:print("没有找到这个学生的信息，无法删除！")elif pd_03 == '3':breakelse:print("请重新选择!")continueelif pd == '4':while True:print("=================  修改学生信息=================")print("========            1.修改学生姓名      =========")print("========            2.修改学生年龄      =========")print("========            3.修改学生成绩      ==========")print("========            4.返回上一层        ==========")print("=================================================")pd_04 = input("请输入选择>>>")if pd_04 == '1':student_num = input("请输入你所要修改的学生的学号：")change_name = input("请输入你要修改的之后的名字：")flag =0for student in student_list:if student["id"] == student_num:flag = 1student["name"] = change_nameprint("修改完成！")breakif flag == 0:print("没有这个学员信息！")elif pd_04 == '2':student_num = input("请输入你所要修改的学生的学号：")change_age = input("请输入你要修改的之后的年龄：")flag =0for student in student_list:if student["age"] == change_name:flag = 1student["name"] = change_ageprint("修改完成！")breakif flag == 0:print("没有这个学员信息！")elif pd_04 == '3':student_num = input("请输入你所要修改的学生的学号：")while True:print("=========================================")print("=======         1.数学          =========")print("=======         2.语文          =========")print("=======         3.英语          ==========")print("=======         4.返回上一层     ==========")print("==========================================")choice = input("请输入你所要修改的课程：")if choice == '1':change_grades = input("请输入修改之后的分数：")flag = 0for student in student_list:if student['id'] ==student_num:flag = 1student["scores"]["math"] = change_gradesbreakelse :print("没有该学生的信息")elif choice == '2':change_grades = input("请输入修改之后的分数：")flag = 0for student in student_list:if student['id'] ==student_num:flag = 1student["scores"]["chinese"] = change_gradesbreakelse :print("没有该学生的信息")elif choice == '3':change_grades = input("请输入修改之后的分数：")flag = 0for student in student_list:if student['id'] ==student_num:flag = 1student["scores"]["english"] = change_gradesbreakelse :print("没有该学生的信息")elif choice == '4':breakelse :print("输入错误，请重新输入！")continueelif pd_04 == "4":breakelse :print("输入错误，请重新输入")continueelif pd == '5':print("已退出学生信息管理系统！")break

以上代码有什么错误，大家可以批评指正！