Build a Simple Python Graduate Student Management System from Scratch

This article walks through creating a simple graduate student information management system using Python, covering basic CRUD operations via a console menu.

The program defines several functions:

Menu() – displays the main options.

CheckIdisRight(StudentList, id) – verifies whether a student ID exists.

PrintStudentList(StudentList) – prints all student records.

AddStudent(StudentList) – collects input and appends a new student.

StudentPersonalMsg() – shows the edit submenu.

ChangeStudent(StudentList) – allows modification of name, phone, employment status, and company.

DeleteStudent(StudentList) – removes a student by ID.

main() – initializes the list with header fields and runs an infinite loop to process user choices.

The core code is shown below:

def Menu():##菜单主界面
  print('*'*22)
  print("* 查看毕业生列表输入: 1 *")
  print("* 添加毕业生信息输入: 2 *")
  print("* 修改毕业生信息输入: 3 *")
  print("* 删除毕业生信息输入: 4 *")
  print("* 退出系统请输入   0 *")
  print('*'*22)

def CheckIdisRight(StudentList,id):##检查学号是否在列表中
  for i in range(0, len(StudentList)):
    if((id in StudentList[i])==True):
      return True
  return False

def PrintStudentList(StudentList):#打印学生信息列表
  for i in range(0, len(StudentList)):
    print(StudentList[i])

def AddStudent(StudentList):##添加学生信息
  number = int((input("请输入学号：")))
  if(number<1000000000 and CheckIdisRight(StudentList,number)==False):##学号判断
    print("学号输入错误&学号已存在！请重新输入：")
    number = (input("请输入学号："))
  name = input("请输入你的名字：")
  tell = input("请输入你的电话：")
  if(len(tell)!=11):
    print("请输入正确的电话号码(11)位：")
    tell = input()
  college = input("请输入你的学院名称：")
  grade = input("请输入你的年级：")
  isjob = int(input("是否就业？：是填 1 否则填0: "))
  if(isjob == 1):
    company = input("请输入你公司的名称：")
  else:
    company = 0
  arry = [number, name, tell, college, grade, isjob, company]
  StudentList.append(arry)##将新建的学生信息进行插入
  PrintStudentList(StudentList)##打印学生信息列表

def StudentPersonalMsg():##修改信息界面选择
  print('*'*22)
  print("* 修改姓名请输入: 1 *")
  print("* 修改电话号码请输入: 2 *")
  print("* 修改是否就业请输入: 3 *")
  print("* 修改就业公司请输入: 4 *")
  print("* 退出修改请输入：0 *")
  print('*'*22)

def ChangeStudent(StudentList):##修改学生信息模块
  def changename(StudentList, arry, i):#修改姓名
    print(arry)
    name = input("请输入修改后的名字：")
    StudentList[i][1] = name
    print("修改后为：")
    PrintStudentList(StudentList)
  def changetell(StudentList, arry, i):#修改电话号码
    print(arry)
    tell = input("请输入修改后的电话号码：")
    StudentList[i][2] = tell
    print("修改后为：")
    PrintStudentList(StudentList)
  def changeisgob(StudentList, arry, i):#修改是否就业情况
    print(arry)
    isgob = int(input("请输入修改后的 是否工作："))
    StudentList[i][5] = isgob
    print("修改后为：")
    PrintStudentList(StudentList)
  def changcompany(StudentList, arry, i):#修改就业公司信息
    print(arry)
    company = input("请输入修改后的公司为：")
    StudentList[i][6] = company
    print("修改后为：")
    PrintStudentList(StudentList)
  print("请输入要修改的学生的学号：")
  id = int(input())
  i=1
  if((CheckIdisRight(StudentList,id))==False):##判断学号是否存在
    print("学号不存在！")
  if(CheckIdisRight(StudentList,id)==True):
    while (i < len(StudentList)):#通过循环找到该学生的信息列表
      if (StudentList[i][0] == id):
        StudentPersonalMsg()##显示出修改的菜单选项
        while (1):
          a = int(input("请输入："))
          while (a):
            if (a == 1):
              ##姓名修改
              changename(StudentList, StudentList[i], i)
              break
            if (a == 2):
              ##电话号码修改
              changetell(StudentList, StudentList[i], i)
              break
            if (a == 3):
              ##是否就业状态修改
              changeisgob(StudentList, StudentList[i], i)
              break
            if (a == 4 and StudentList[i][5] == 1):
              ##就业公司修改
              changcompany(StudentList, StudentList[i], i)
              break
            if (a == 4 and StudentList[i][5] == 0):
              print("学生尚未就业，请先修改是否就业信息！")
              break
          if (a == 0):
            ##按0 退出修改信息功能
            break
        ##返回到主界面的菜单选项
        break
      i = i + 1

def DeleteStudent(StudentList):##删除学生信息
  print("请输入要删除的学生的学号：输入0退出！")
  id = int(input())
  i = 1
  if((CheckIdisRight(StudentList,id))==False):
    print("学号不存在！")
  if(CheckIdisRight(StudentList,id)==True):
    ##同样先判断学号学号是否存在
    while (i < len(StudentList)):
     if (StudentList[i][0] == id):
       del StudentList[i]
       print("删除成功！")
       break
     if (id == 0):
       break
     i = i + 1
  PrintStudentList(StudentList)#打印学生信息列表

def main():
  Menu()
  StudentInfo = ['学号', '姓名', '电话', '学院', '年级', '是否就业', "就业公司"]
  ##先默认插入一个用于显示的列表的列表
  StudentList = [StudentInfo]
  while(1):
    a = int(input("请输入："))
    while(a):
      if(a==1):
        PrintStudentList(StudentList)
        Menu()
        break
      if(a==2):
        AddStudent(StudentList)
        Menu()
        break
      if(a==3):
        ChangeStudent(StudentList)
        Menu()
        break
      if(a==4):
        DeleteStudent(StudentList)
        Menu()
        break
    if (a == 0):##按0退出进程
      exit()
main()

The article concludes by noting that the basic functionality has been implemented, acknowledges some shortcomings, and invites readers to explore further related Python tutorials.