Python學(xué)生成績管理系統(tǒng)-代碼

1、 PAGE PAGE 5 / 5Python 學(xué)生成績管理系統(tǒng)完整代碼1. #STUDENT類 classSTUDENT:definit(self):=self.id=0self.chinese=0self.math=0self.english=010.def Input(self):=input(請輸入學(xué)生姓名:)self.id=input(請輸入學(xué)生學(xué)號:)self.chinese=int(input(請輸入語文成績:)self.math=int(input(請輸入數(shù)學(xué)成績:)self.english=int(input(請輸入英語成績:)self.su

2、m=self.chinese + self.math +self.english 18.def Show(self):print(姓名:,,t學(xué)號:,self.id,t語文成績:,self.chinese,t數(shù)學(xué)成績:,self.math,t英語成績:,self.english,t,總分:,self.sum)21.22.defShowMenu():23.print(*tt學(xué)生成績管理系統(tǒng)tt*)24.print(*tttt*)25.print(*tt1.錄入學(xué)生成績 tt*)26.print(*tt2.顯示學(xué)生成績 tt*)27.print(*tt3.排序統(tǒng)計成績 tt*)2

3、8.print(*tt4.查找學(xué)生成績 tt*)29.print(*tt5.刪除學(xué)生信息 tt*)30.print(*tt6.修改學(xué)生信息 tt*)31.print(*tt7.保存學(xué)生信息 tt*)32.print(*tt0.安全退出系統(tǒng) tt*)33.print()34.35.defAddItem():36.stu = STUDENT()37.stu.Input()38.if_exist=FindStudentID(stu.id)#id查重39.if if_exist = len(GradeList):40.print(學(xué)號沖突!學(xué)生已存在!學(xué)號必須唯一!請重新輸入!)41.input(按回

4、車鍵繼續(xù).)42.return43.GradeList.append(stu)44.print(錄入成功!)45.input(按回車鍵繼續(xù).)46.47.defDisplay():48.for i in range(len(GradeList):49.GradeListi.Show()50.#for stu in GradeList:51.#stu.Show()52.input(52.input(按回車鍵繼續(xù).)53.54.defSort():55.print(正在排序!請稍后.)56.位置GradeList_cp=GradeList:GradeList_cp.sort(key=lambdax

5、:x.sum,reverse=True)#lambda匿名函數(shù),后是表達式sum_max=GradeList_cp0.sumsum_min=GradeList_cp-1.sum60.s=0for i inrange(len(GradeList_cp):s=s+GradeList_cpi.sumsum_average=float( s /len(GradeList_cp) 64.GradeList.sort(key=lambda xx.sumreverse=True)#將原列表元素，按總分由高到低排序print(排序完成!)print(總分平均分為:,sum_average)按回車鍵繼續(xù).) 7

6、1.defFindStudent(name):for i inrange(len(GradeList):if GradeL = name:return i76.i=99999977.return 78.defFindStudentID(id):for i inrange(len(GradeList):if GradeListi.id = id:return i83.i=99999984.return i85.86.defFind():87.print(tt*)88.print(tt1.按學(xué)生姓名查找2.按學(xué)生學(xué)號查找)89.print(tt*)90.x=input(tt請選擇

7、功能:)91.if x=1 :92.name=input(請輸入學(xué)生姓名:)93.index=FindStudent(name)94.if index = 999999:95.print(未找到該學(xué)生!)96.else:97.GradeListindex.Show()98.input(按回車鍵繼續(xù).)99.elif x=2 :100.id=input(請輸入學(xué)生學(xué)號:)101.index=FindStudentID(id)102.if index = 999999:103.print(未找到該學(xué)生!)104.else:105.GradeListindex.Show()106.input(按回車

8、鍵繼續(xù).)107.else :108.print(非法輸入!請重新輸入!)109.input(按回車鍵繼續(xù).)110.111.def RemoveItem():112.name=input(請輸入要刪除的學(xué)生姓名:)113.print(正在執(zhí)行刪除操作!請稍后.)114.index=FindStudent(name)115.del GradeListindex116.print(刪除成功!)117.input(按回車鍵繼續(xù).)118.119.def ModifyItem():120.name=input(請輸入要修改信息的學(xué)生姓名:)121.index=FindStudent(name)122

9、.print(修改前學(xué)生信息如下:)123.GradeListindex.Show()124.print(請重新輸入新的學(xué)生信息:)125.GradeListindex.Input()126.print(修改后學(xué)生信息如下:)127.GradeListindex.Show()128.input(按回車鍵繼續(xù).)129.130.def Save():file_stu=open(students.txt,w)for i inrange(len(GradeList):str_student=GradeL+t+GradeListi.id+t+str(GradeListi.chines

10、e)+t+str(GradeListi.math)+t+str(GradeListi.english)+t+str(GradeListi.sum)file_stu.write(str_student)file_stu.write(n)file_stu.close()print(保存文件成功!)按回車鍵繼續(xù).) 139.defReadFile():try:file_stu = open(students.txt,r)temp_student=file_stu.readlines()for i inrange(len(temp_student):stu =STUDENT()str_student=

11、temp_studenti.split(t) =str_student0stu.id =str_student1stu.chinese =int(str_student2)stu.math =int(str_student3)stu.english =int(str_student4)stu.sum =int(str_student5)GradeList.append(stu)del stuprint(讀取文件成功!)file_stu.close()except IOError:print(打開異常!這是一個新系統(tǒng)，請錄入學(xué)生信息!)return#主體代碼GradeList=163.print(*)164.print(*歡迎進入學(xué)生成績管理系統(tǒng)165.print(*)print(t正在加載學(xué)生信息!請稍后.)168.QUIT=Falseinput(按回車鍵繼續(xù).)while(QUIT!=True):ShowMenu()x=input(tt請選擇功能:) 174.if x=0:175.QUIT=True176.elif x=1:177.AddItem()178.elif x=2 :179.Displa