学生录入练习

# -*- coding: utf-8 -*-  
students = []
choice = 0
def menu():
    print("""
    1 - 录入学生
    2 - 查询学生
    3 - 删除学生
    4 - 列出所有学生
    0 - 退出
    """)
    global choice
    choice = int(input("请选择: "))

def luru():
    student = {}
    student["name"] = input("输入学生的姓名")
    student["xuehao"] = input("输入学生的学号")
    students.append(student)
    print("成功添加学生")

def showall():
    for st in students:
        print(st)

def chaxun():
    xh = input("请输入学生学号: ")
    find = False
    for st in students:
        if st["xuehao"] == xh:
            print(f"学生姓名: {st.get('name')},学号: {st['xuehao']}")
            find = True
            break
    if not find:
        print("没有找到")

def shanchu():
    find = False
    xh = input("请输入学号: ")
    for st in students:
        if st["xuehao"] == xh:
            find = True
            students.remove(st)
    if find:
        print("已经删除")
    else:
        print("没有找到学生")

menu()

while choice !=0:
    if choice == 1:
        luru()
    elif choice == 2:
        chaxun()
    elif choice == 3:
        shanchu()
    elif choice == 4:
        showall()
    else:
        print("输入有问题")
    
    menu()

print("已经退出程序")