python报错：Traceback (most recent call last):KeyError: 'id'

Question

import os
filename='student.txt'
def main():
    while True:
        menu()
        choice=int(input('请选择你要做的事情'))
        if choice in [0,1,2,3,4,5,6,7]:
            if choice==0:
                answer=input('您确定要退出系统吗y/n')
                if answer=='y' or answer=='Y':
                    print('谢谢您的使用，再见')
                    break #退出系统
                else:
                    continue
            elif choice==1:
                insert() #录入学生信息
            elif choice == 2:
                search()
            elif choice == 3:
                delete()
            elif choice == 4:
                modify()
            elif choice == 5:
                sort()
            elif choice == 6:
                total()
            elif choice == 7:
                show()
def menu():
    print('======================学生信息管理系统======================')
    print('-------------------------功能菜单--------------------------')
    print('\t\t\t\t\t\t1.录入学生信息')
    print('\t\t\t\t\t\t2.查找学生信息')
    print('\t\t\t\t\t\t3.删除学生信息')
    print('\t\t\t\t\t\t4.修改学生信息')
    print('\t\t\t\t\t\t5.排序')
    print('\t\t\t\t\t\t6.统计学生总人数')
    print('\t\t\t\t\t\t7.显示所有学生信息')
    print('\t\t\t\t\t\t0.退出')
    print('——————————————————————————————————————————————————————————')

def insert():
    student_list=[]
    while True:
        id=input('请输入ID（如1001）：')
        if not id:
            break
        name=input('请输入姓名：')
        if not name:
            break

        try:
            english=int(input('请输入英语成绩:'))
            python=int(input('请输入Python成绩:'))
            java=int(input('请输入java成绩:'))
        except:
            print('输入无效，不是整数类型，请重新输入。')
            continue
        #将录入的学生信息保存到字典中
        student={'ID':id,'name':name,'english':english,'python':python,'java':java}
        student_list.append(student)
        answer=input('是否继续添加y/n\n')
        if answer=='y':
            continue
        else:
            break

    #调用save（）函数
    save(student_list)
    print('学生信息录入完毕！')

def save(lst):
    try:
        stu_txt=open(filename,'a',encoding='utf-8')
    except:
        stu_txt=open(filename,'w',encoding='utf-8')
    for item in lst:
        stu_txt.write(str(item)+'\n')
    stu_txt.close()

def search():
    pass
def delete():
    while True:
        student_id=input('请输入要删除的学生ID:')
        if student_id!='':
            if os.path.exists(filename):
                with open(filename,'r',encoding='utf-8')as file:
                    student_old=file.readlines()
            else:
                student_old=[]
            flag=False   #标记是否删除
            if student_old:
                with open(filename,'w',encoding='utf-8')as wfile:
                    d={}
                    for item in student_old:
                        d=dict(eval(item)) #将字符串转成字典
                        if d['id']!=student_id:
                            wfile.write(str(d)+'\n')
                        else:
                            flag=True
                    if flag:
                        print(f'id为{student_id}的学生信息已被删除')
                    else:
                        print(f'没有找到ID为{student_id}的学生信息')
            else:
                print('无学生信息')
                break
            show() #删除之后要重新显示所有学生信息
            answer=input('是否继续删除y/n\n')
            if answer=='y':
                continue
            else:
                break


def modify():
    pass
def sort():
    pass
def total():
    pass
def show():
    pass

if __name__ == '__main__':
    main()

下面是报错
Traceback (most recent call last):
File "C:\Users\kyrie\PycharmProjects\pythonProject\venv\stusystem.py", line 127, in
main()
File "C:\Users\kyrie\PycharmProjects\pythonProject\venv\stusystem.py", line 20, in main
delete()
File "C:\Users\kyrie\PycharmProjects\pythonProject\venv\stusystem.py", line 98, in delete
if d['id']!=int(student_id):
KeyError: 'id'

Answer 1

键名称是ID，不是id，注意大小写