Python student management system (list optimized version)

student management system

main feature:

1. It can detect whether the student number is repeated/incorrect (not pure numbers)

2. It can detect whether the mobile phone number is legal (whether it is a pure number)

3. Can detect whether the gender is male or female
       
4. Can selectively modify a certain attribute information of a student, such as modifying only the mobile phone number of a certain student

5. Able to realize basic additions, deletions, modifications and inspections    

6. Optimized the code

Features

1. Add student information

2. Deleting student information

3. Modify student information

4. Query individual student information,

5. Check all student information

6. Save student information

7. Exit the system
 

interface design

Notice:

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python code implementation

name_list = []  # 存储学生信息字典，学生信息用字典存，再用列表存储字典


# 菜单
def display_menu():
    print("-" * 30)
    print("   学生管理系统  v9.9  ")
    print("1.添加学生信息")
    print("2.删除学生信息")
    print("3.修改学生信息")
    print("4.查询单个学生信息")
    print("5.查询所有学生信息")
    print("6.保存学生信息")
    print("7.退出系统")
    print("-" * 30)


# 选择序号的获得
def get_choice():
    selected_key = input("请输入选择的序号：")
    return selected_key


# 检查性别是否合法
def check_sex(new_sex):
    flag = True
    while flag:
        if new_sex == '男' or new_sex == '女':
            flag = False
        else:
            new_sex = input("输入性别有误，请重新输入(男/女)：")
    return new_sex


# 检查电话号码是否合法
def check_phone(new_phone):
    flag = True
    while flag:
        if new_phone.isdigit():
            flag = False
        else:
            new_phone = input("您输入的电话号码有误，请重新输入：")
    return new_phone


# 检查学号是否重复或者有误
def check_id(new_id):
    flag = True
    while flag:
        # 先检查是不是纯数字再去考虑是否重复的事情，如果不是纯数字直接pass
        if new_id.isdigit():
            for i in range(len(name_list)):
                if name_list[i]['id'] == new_id:
                    new_id = check_id(input("您输入的学号重复，请重新输入："))
            flag = False
        else:
            new_id = input("您输入的学号有误，请重新输入：")
    return new_id


# 添加学生信息
def add_name():
    new_info = {}
    new_id = check_id(input("请输入学号："))
    new_info['id'] = new_id
    new_name = input("请输入姓名：")
    new_info['name'] = new_name
    new_sex = check_sex(input("请输入性别(男/女)："))
    new_info['sex'] = new_sex
    new_phone = check_phone(input("请输入电话号码："))
    new_info['phone'] = new_phone
    name_list.append(new_info)
    print("添加成功！")


# 查询所有学生信息
def find_all():
    print("=" * 30)
    for name in name_list:
        print(name['id'], name['name'], name['sex'], name['phone'])
    print("=" * 30)


# 删除学生信息
def del_name():
    del_id_is = input("请输入要删除的学生学号：")
    flag = False
    index = 0
    for i in range(len(name_list)):
        if name_list[i]['id'] == del_id_is:
            flag = True
            index = i
            break
    if flag:
        name_list.pop(index)
        print("删除成功！")
    else:
        print("学生未找到！请检查学号输入是否有误！")


# 名字修改细节函数
def choice_of_name(index):
    while True:
        choice = input("请输入要修改学生的(1.id 2.姓名 3.性别 4.电话号码，5.全部修改)：")
        if choice == '5':
            new_id = input("请输入新的学号：")
            name_list[index]['id'] = new_id
            new_name = input("请输入新的姓名：")
            name_list[index]['name'] = new_name
            new_sex = check_sex(input("请输入性别(男/女)："))
            name_list[index]['sex'] = new_sex
            new_phone = check_phone(input("请输入电话号码："))
            name_list[index]['phone'] = new_phone
            break
        elif choice == '1':
            new_id = input("请输入新的学号：")
            name_list[index]['id'] = new_id
            break
        elif choice == '2':
            new_name = input("请输入新的姓名：")
            name_list[index]['name'] = new_name
            break
        elif choice == '3':
            new_sex = check_sex(input("请输入性别(男/女)："))
            name_list[index]['sex'] = new_sex
            break
        elif choice == '4':
            new_phone = check_phone(input("请输入电话号码："))
            name_list[index]['phone'] = new_phone
            break
        else:
            print("输入有误，请重新输入！")


# 修改学生信息
def re_name():
    id_is = input("请输入要修改的学生学号：")
    flag = False
    index = 0
    # 先找到要修改的学生的下标
    for i in range(len(name_list)):
        if name_list[i]['id'] == id_is:
            flag = True
            index = i
            break
    if flag:
        choice_of_name(index)
        print("修改成功！")
    else:
        print("修改失败，学生信息未找到！")


# 查询单个学生信息
def find_name():
    find_id_is = input("请输入要查询的学生学号：")
    flag = False
    index = 0
    for i in range(len(name_list)):
        if name_list[i]['id'] == find_id_is:
            flag = True
            index = i
            break
    if flag:
        print("学生查询到，学生信息为：")
        print(name_list[index]['id'], name_list[index]['name'], name_list[index]['sex'], name_list[index]['phone'])
    else:
        print("学生未找到！")






# 从文件读取数据
def recoverData():
    global name_list
    f = open("backup.data",'r',encoding='UTF-8')
    content = f.read()
    name_list = eval(content)
    f.close()

# 实现序号6 保存学生信息
def saveToFile():
    f = open("backup.data", "w", encoding="UTF-8")
    f.write(str(name_list))
    f.close()


def main():
    recoverData()
    exit_name = True
    while exit_name:
        display_menu()
        key = get_choice()
        if key == '1':
            add_name()
        elif key == '2':
            del_name()
        elif key == '3':
            re_name()
        elif key == '4':
            find_name()
        elif key == '5':
            find_all()
        elif key == '6':
            saveToFile()
        elif key == '7':
            exit_name = False
        else:
            print("请输入正确的数值！")


main()

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