#!/usr/bin/env python # -*- coding: UTF-8 -*- # Author:Du Fei import os #学号,姓名,年龄,性别,身高 allStudentsList=[] #从文件中读取数据 def readFromFile(fileName): if not os.path.exists(fileName):# 如果文件不存在,则新增一个空文件 f = open(fileName,"w") f.close() with open(fileName,"r",encoding="utf-8") as f: for onStr in f: oneList=onStr.strip("\n").split(",") oneList[0]=int(oneList[0])#学号 oneList[1]=oneList[1]#姓名 oneList[2]=int(oneList[2])#年龄 oneList[3]=oneList[3]#性别 oneList[4]=float(oneList[4])#身高 allStudentsList.append(oneList) #将数据写入文件 def writeToFile(fileName): f =open(fileName,"w") f.close() with open(fileName,"a",encoding="utf-8") as f: for oneList in allStudentsList: oneStr=str(str(oneList[0])+","+oneList[1]+","+str(oneList[2])+","+oneList[3]+","+str(oneList[4])+"\n") f.write(oneStr) #显示所有学生信息 def allStudentsShow(): for one in allStudentsList: print("学号:%d,姓名:%s,年龄:%d,性别:%s,身高:%f" % (one[0], one[1], one[2], one[3],one[4])) #新增学生 def addNewStudent(newStuList): #check学号是否重复复 for one in allStudentsList: if one[0] == newStuList[0]: return -1 #学号重复 allStudentsList.append(newStuList) writeToFile("student.txt") return 1 #修改学生年龄 def updateStudentsAge(id,newAge): for one in allStudentsList: if one[0]==id: one[2]=newAge break else: return -1#找不到此学号 writeToFile("student.txt") return 1 #删除学生 def deleteStudent(id): index =0 for one in allStudentsList: if one[0] ==id: del allStudentsList[index] break index +=1 else: return -1#找不到要删除的学号 writeToFile("student.txt") return 1 #按照姓名查找 def searchStudents(name): flag =0 for one in allStudentsList: if one[1]==name: print("学号:%d,姓名:%s,年龄:%d,性别:%s,身高:%f" % (one[0], one[1], one[2], one[3], one[4])) flag=1 if flag==0: return -1#查无此人 return 1 def sortMe(oneList): return oneList[0] #按序号排序 def orderById(flag):#flag:1升序,2降序 if flag==1:#升序 allStudentsList.sort(reverse=False,key=lambda oneList:oneList[0]) else: allStudentsList.sort(reverse=True,key=sortMe) #功能菜单 def menuShow(): print("**********************************") print("*1.查看所有学生信息****************") print("*2.新增学生************************") print("*3.修改学生************************") print("*4.删除学生************************") print("*5.按姓名查找**********************") print("*6.按学号排序**********************") print("*7.保存***************************") print("*8.退出***************************") print("**********************************") if __name__ == "__main__": #从文件中读取数据 readFromFile("student.txt") # print(allStudentsList) while True: # 显示主菜单 menuShow() select =int(input("请选择功能选项:")) if select == 1: allStudentsShow() elif select == 2: while True: try: id = int(input("请输入学号:")) name = input("请输入姓名:") age = int(input("请输入年龄:")) sex = input("请输入性别:") height = float(input("请输入身高:")) newStuList=[id,name,age,sex,height] if addNewStudent(newStuList) ==-1