学生管理系统

import os 

STU_INFO = list()

def menu():
    print(" "*32,"欢迎使用学生管理系统v1.0")
    print(" "*30,"1:添加学生")
    print(" "*30,"2:删除学生")
    print(" "*30,"3:修改学生")
    print(" "*30,"4:查询学生")
    print(" "*30,"5:显示所有学生")
    print(" "*30,"6:退出系统")

def add_stu():
    stu_name = input("请输入学生姓名：")
    stu_age = input("请输入学生年龄：")
    stu_phone = input("请输入学生手机号：")

    # global STU_INFO

    stu_dict = {}

    stu_dict["name"] = stu_name
    stu_dict["stu_age"] = stu_age
    stu_dict["stu_phone"] = stu_phone
    STU_INFO.append(stu_dict)

    # STU_INFO.append(stu_name)
    # STU_INFO.append(stu_age)
    # STU_INFO.append(stu_phone)

    # print(stu_dict)
    print(STU_INFO)

def show_all_stu():
    print("ID\t姓名\t年龄\t手机号\t")
    i = 0

    for stu_dict_tmp in STU_INFO:
        # for key,value in stu_dict_tmp.items():
            # print(f"学生姓名：%s" % key,value)
            # print("学生姓名：",value)
        # print(stu_dict_tmp)
        print("%d\t%s\t%s\t%s\t" % (i,stu_dict_tmp.get("name"),stu_dict_tmp.get("stu_age"),stu_dict_tmp.get("stu_phone")))
        i += 1

def del_stu():
    stu_id_input = int(input("请输入学生ID："))
    if 0 <= stu_id_input < len(STU_INFO):
        confirm_del = input("是否真的删除Y/N：")
        if confirm_del.isalpha() and confirm_del.upper() == "Y":
            del STU_INFO[stu_id_input]

def query_stu():
    i = 0 
    
    query_stu_name = input("请输入学生姓名：")
    for stu_dict_tmp in STU_INFO:
        # if query_stu_id in stu_dict_tmp:
        if stu_dict_tmp.get("name") == query_stu_name:
            print("ID\t姓名\t年龄\t手机号")
            print("%d\t%s\t%s\t%s\t" %(i,stu_dict_tmp.get("name"),stu_dict_tmp.get("stu_age"),stu_dict_tmp.get("stu_phone")))
        # i += 1

def modify_stu():
    query_stu_name = input("请输入学生姓名：")
    for query_stu_dict_tmp in STU_INFO:
        if query_stu_dict_tmp.get("name") == query_stu_name:
            after_modification_value = input("请输入新的值：")
            query_stu_dict_tmp["name"] = after_modification_value
def main():
    while True:
        menu()

        op = input("请输入操作项：")
        if op == "1":
            add_stu()
        elif op == "2":
            del_stu()
        elif op == "3":
            modify_stu()
        elif op == "4":
            query_stu()
        elif op == "5":
            show_all_stu()
        elif op == "6":
            confirm_exit = input("是否真的退出(Y/N): ")
            if confirm_exit.upper() == "Y":
                break
            #    exit()
        else:
            print("输入有误")
            
        input("请回车继续.....")
        os.system("cls")


main()