学生管理系统~~~

stu_list = []
def func1():
    num_srt = input('请输入新生学号：')
    num = int(num_srt)
    name = input('请输入新生姓名：')
    age = input('请输入新生年龄：')
    stu = {'stu_num':num,'stu_name':name,'stu_age':age}
    stu_list.append(stu)
    print('添加成功')

def func2():
    num_str = input('请输入学生学号：')
    num = int(num_str)
    is_exists = True
    for stu in stu_list:
        num1 = stu.get('stu_num')
        if num1 == num:
            stu_list.remove(stu)
            print('删除成功！')
            is_exists = False
    if is_exists:
            print('你输入的学号不存在！')

def func3():
    num_str = input('请输入要修改信息学生的学号：')
    num = int(num_str)
    is_exists = True
    for stu in stu_list:
        num1 = stu.get('stu_num')
        if num1 == num:
            print('学号是：',stu.get('stu_num'),'姓名是：',stu.get('stu_name'),'年龄是：',stu.get('stu_age'))
            new_age = input('请输入新的年龄：')
            stu['stu_age']= int(new_age)
            print('修改成功！')
            is_exists = False
    if is_exists:
        print('你输入的学号不存在！')

def func4():
    num = int(input('请输入学号：'))
    is_exists = True
    for stu in stu_list:
        num1 = stu.get('stu_num')
        if num1 == num:
            print('学号是：',stu.get('stu_num'),'姓名是：',stu.get('stu_name'),'年龄是：',stu.get('stu_age'))
            is_exists = False
    if is_exists:
        print('学号输入有误，请查证后再输入！')

def main():
    while True:
        choice = input('A、添加学生 B、根据学号删除学生 C、修改信息 D、查询 E、退出')
        if choice == 'A' or choice == 'a':
            func1()
        elif choice == 'B' or choice == 'b':
            func2()
        elif choice == 'C' or choice == 'c':
            func3()
        elif choice == 'D' or choice == 'd':
            func4()
        elif choice == 'E' or choice == 'e':
            break
    print('当前班级学生信息：')
    for stu in stu_list:
        print('学号是：',stu.get('stu_num'),'姓名是：',stu.get('stu_name'),'年龄是：',stu.get('stu_age'))
        print('****'*10)

main()