class StudentManagerView:
def __init__(self):
self.__manager = StudentManagerController()
def __display_menu(self):
print("""
1) 添加学生信息
2) 显示学生信息
3) 删除学生信息
4) 修改学生信息
5) 按照成绩从高到低显示
""")
def __select_menu(self):
item = input("请输入选项：")
if item == "1":
self.__input_students()
elif item == "2":
self.__output_students()
elif item == "3":
self.__delete_student()
elif item == "4":
self.__modify_student()
elif item == "5":
self.__output_student_by_score()
def main(self):
while True:
self.__display_menu()
self.__select_menu()
def __input_students(self):
while True:
name = input("请输入姓名:")
# age = int(input("请输入年龄："))
age = self.__input_number("年龄")
score = self.__input_number("成绩")
stu = StudentModel(name, age, score)
# StudentManagerController().add_student(....)
self.__manager.add_student(stu)
if input("输入e退出:") == "e":
break
def __input_number(self, message):
while True:
try:
number = int(input("请输入%s:" % message))
break
except:
print("输入有误.")
return number
def __output_students(self):
for item in self.__manager.stu_list:
print(item.id, item.name, item.age, item.score)
def __delete_student(self):
# id = int(input("请输入需要删除的编号："))
id = self.__input_number("需要删除的编号")
if self.__manager.remove_student(id):
print("删除成功")
else:
print("删除失败")
def __modify_student(self):
stu = StudentModel()
# stu.id = int(input("请输入需要修改的学生编号："))
stu.id = self.__input_number("需要修改的学生编号")
stu.name = input("请输入需要修改的学生姓名：")
# stu.age = int(input("请输入需要修改的学生年龄："))
stu.age = self.__input_number("需要修改的学生年龄")
# stu.score = int(input("请输入需要修改的学生成绩："))
stu.score = self.__input_number("需要修改的学生成绩")
if self.__manager.update_student(stu):
print("修改成功")
else:
print("修改失败")
def __output_student_by_score(self):
self.__manager.order_by_score()
self.__output_students()
class StudentManagerView:
"""
学生管理器视图,负责处理界面逻辑.
"""
def __init__(self):
self.__controller = StudentManagerController()
def __display_menu(self):
print("1)添加学生")
print("2)显示学生")
print("3)删除学生")
print("4)修改学生")
def __select_menu_item(self):
item = input("请您输入选项:")
if item == "1":
self.__input_students()
elif item == "2":
self.__output_students()
elif item == "3":
self.__delete_student()
elif item == "4":
self.__modify_student()
def main(self):
while True:
self.__display_menu()
self.__select_menu_item()
def get_int_info(self, str_info):
while True:
try:
result = int(input("请输入%s:" % str_info))
return result
except:
print("%s输入有误" % str_info)
def __input_students(self):
# 调用逻辑控制类的add_student方法
while True:
stu = StudentModel()
stu.name = input("请输入姓名:")
if stu.name == "":
break
stu.age = self.get_int_info("年龄")
stu.score = self.get_int_info("成绩")
# while True:
# try:
# stu.score = int(input("请输入成绩:"))
# break
# except:
# print("年龄输入有误")
self.__controller.add_student(stu)
def __output_students(self):
for item in self.__controller.stu_list:
print(item.id, item.name, item.age, item.score)
def __delete_student(self):
while True:
# id = int(input("请输入需要删除的学生编号:"))
id = self.get_int_info("需要删除的学生编号")
if self.__controller.remove_student(id):
print("删除成功")
break
else:
print("删除失败")
def __modify_student(self):
stu = StudentModel()
stu.id = int(input("请输入需要修改的学生编号:"))
stu.name = input("请输入新的姓名:")
stu.age = int(input("请输入新的年龄:"))
stu.score = int(input("请输入新的成绩:"))
if self.__controller.update_student(stu):
print("修改成功")
else:
print("修改失败")
class StudentManagerView:
"""
界面视图类
"""
def __init__(self):
#创建逻辑控制器对象
self.__manager = StudentManagerController()
def __input_int(self,str):
while True:
try:
return int(input(str))
except:
print("输入有误")
def __input_student(self):#1
#1,在控制台中录入学生信息,存成学生对象StudentModel
#2,调用逻辑控制器的add_student方法
stu = StudentModel()
stu.name = input("请输入学生姓名")
# stu.age = int(input("请输入学生年龄"))
stu.age = self.__input_int("请输入学生年龄")
# stu.score = float(input("请输入学生成绩"))
stu.score = self.__input_int("请输入学生成绩")
self.__manager.add_student(stu)
# print(self.__manager)
def __output_students(self,list_target):#2
"""
显示学生
:return: 学生信息
"""
# for item in self.__manager.stu_list:
for item in list_target:
print(item.id, item.name, item.age, item.score)
def __delete_student(self):#3
# value = int(input("请输入需要删除的学生id"))
value = self.__input_int("请输入需要删除的学生id")
if self.__manager.remove_student(value):
print("删除成功")
else:
print("删除失败")
def __modify_student(self):#4
"""
修改学生信息
:return:
"""
stu = StudentModel()
# stu.id = int(input("请输入需要修改的学生id"))
stu.id = self.__input_int("请输入需要删除的学生id")
stu.name = input("请输入学生姓名")
# stu.age = int(input("请输入学生年龄"))
stu.age =self.__input_int("请输入学生年龄")
# stu.score = float(input("请输入学生成绩"))
stu.score = self.__input_int("请输入学生成绩")
if self.__manager.update_student(stu):
print("修改成功")
else:
print("修改失败")
def __output_student_by_score(self):#5
"""
根据成绩排序
:return:
"""
list_target = self.__manager.sorting_stu_by_score()
self.__output_students(list_target)
def __display_menu(self):
"""
显示菜单
:return:
"""
print("1)添加学生")
print("2)显示学生")
print("3)删除学生")
print("4)修改学生")
print("5)按照成绩降序排列")
def __select_menu(self):
number = input("请输入选项：")
if number == "1":
self.__input_student()
elif number == "2":
self.__output_students(self.__manager.stu_list)
elif number == "3":
self.__delete_student()
elif number == "4":
self.__modify_student()
elif number == "5":
self.__output_student_by_score()
def main(self):
"""
界面入口方法
:return:
"""
while True:
self.__display_menu()
self.__select_menu()
class StudentManagerView:
"""
界面视图类
"""
def __init__(self):
# 创建逻辑控制器对象
self.__manager = StudentManagerController()
def __input_int(self, msg):
while True:
try:
return int(input(msg))
except:
print("您的输入有误!!!")
def __input_students(self):
# 1. 在控制台中录入学生信息,存成学生对象StudentModel.
stu = StudentModel()
# stu.name = input("请输入学生姓名:")
# stu.age = int(input("请输入学生年龄:"))
# stu.score = int(input("请输入学生成绩:"))
stu.name = input("请输入学生姓名:")
stu.age = self.__input_int("请输入学生年龄:")
stu.score = self.__input_int("请输入学生成绩:")
# 2. 调用逻辑控制器的add_student方法
self.__manager.add_student(stu)
def __output_student_by_score(self):
"""
根据成绩显示学生所有信息
:return:
"""
list_target = self.__manager.order_by_score()
self.__output_students(list_target)
def __output_students(self, list_target):
print("+------+---------------+----------+----------+")
print("| id | name | age | score |")
print("+------+---------------+----------+----------+")
for item in list_target:
id = str(item.id).center(6)
name = item.name.center(15)
age = str(item.age).center(10)
score = str(item.score).center(10)
print("|%s|%s|%s|%s|" % (id, name, age, score))
print("+------+---------------+----------+----------+")
def __delete_student(self):
# id = int(input("请输入要删除的学生ID:"))
id = self.__input_int("请输入要删除的学生ID:")
self.__manager.remove_student(id)
def __modify_student(self):
stu = StudentModel()
# stu.id = int(input("请输入要修改的学生ID:"))
# stu.name = input("请输入学生姓名:")
# stu.age = int(input("请输入学生年龄:"))
# stu.score = int(input("请输入学生成绩:"))
stu.id = self.__input_int("请输入要修改的学生ID:")
stu.name = input("请输入学生姓名:")
stu.age = self.__input_int("请输入学生年龄:")
stu.score = self.__input_int("请输入学生成绩:")
self.__manager.update_student(stu)
def __display_menu(self):
"""
显示菜单
:return:
"""
print('+-------------------------+')
print('| 1) 添加学生信息 |')
print('| 2) 显示学生信息 |')
print('| 3) 删除学生信息 |')
print('| 4) 修改学生成绩 |')
print('| 5) 按照成绩升序排列 |')
print('+-------------------------+')
def __select_menu(self):
"""
选择菜单
:return:
"""
number = input("请输入选项:")
if number == "1":
self.__input_students()
elif number == "2":
self.__output_students(self.__manager.stu_list)
elif number == "3":
self.__delete_student()
elif number == "4":
self.__modify_student()
elif number == "5":
self.__output_student_by_score()
def main(self):
"""
界面入口方法
:return:
"""
while True:
self.__display_menu()
self.__select_menu()
class StudentManagerView:
"""
学生管理器视图,负责处理界面逻辑.
"""
def __init__(self):
# 将StudentManagerController类的对象作为一个私有变量
self.__controller = StudentManagerController()
def __display_menu(self):
print("1)添加学生")
print("2)显示学生")
print("3)删除学生")
print("4)修改学生")
print("5)成绩排序")
def __select_menu_item(self):
item = input("请您输入选项:")
if item == "1":
self.__input_students()
elif item == "2":
self.__output_students()
elif item == "3":
self.__delete_student()
elif item == "4":
self.__modify_student()
elif item == "5":
self.__order_student()
def main(self):
"""
主函数，先显示再选择
:return:
"""
while True:
self.__display_menu()
self.__select_menu_item()
def __input_students(self):
while True:
# 创建学生对象
stu = StudentModel()
# 添加信息
stu.name = input("请输入姓名：")
if stu.name == "":
break
stu.age = int(input("请输入年龄："))
stu.score = int(input("请输入分数："))
# 得到学生信息后要调用add方法，但add是在StudentManagerController类里面的
# 必须通过StudentManagerController类的对象来访问。
# 所以常规的想法是先创建一个类，再调用方法，如下：
# controller = StudentManagerController()
# controller.add_student(stu)
# 但是这样每次都要创建一个新的类，每次调用时都创建一个新列表存放学生对象
# 这样无法将学生都添加到一个列表中，不符合要求
# 所以我们采用下面的做法：把类对象作为私有变量，只有一个对象，存放在一个列表中
self.__controller.add_student(stu)
def __output_students(self):
for item in self.__controller.stu_list:
print(item.id, item.name, item.age, item.score)
def __delete_student(self):
# 根据学生id删除,界面只做输入输出操作，不处理逻辑
student_id = int(input("请输入需要删除的学生id："))
if self.__controller.remove_student(student_id):
print("删除成功")
else:
print("删除失败")
def __modify_student(self):
# 根据学生id修改
stu = StudentModel()
stu.id = int(input("请输入要修改的学生id："))
stu.name = input("请输入修改后的姓名：")
stu.age = int(input("请输入修改后的年龄："))
stu.score = int(input("请输入修改后的分数："))
if self.__controller.update_student(stu):
print("修改成功")
else:
print("修改失败")
def __order_student(self):
self.__controller.order_by_score()
class StudentManagerView:
"""
学生管理器视图
"""
def __init__(self):
# 将类实体化
self.__manager = StudentManagerController()
def __display_menu(self):
"""
显示菜单
"""
print("1>增加学生信息")
print("2>显示学生信息")
print("3>删除学生信息")
print("4>修改学生信息")
print("5>按成绩低～高显示学生信息")
print("0>退出管理")
def __select_menu(self):
"""
选择菜单项
"""
i = int(input("please enter menu option:"))
if i == 0:
# 让程序中断
raise ValueError("退出循环")
elif i == 1:
self.__input_student()
elif i == 2:
self.__output_students(self.__manager.stu_list)
elif i == 3:
self.__delete_student()
elif i == 4:
self.__modify_student()
elif i == 5:
self.__output_student_by_score()
def main(self):
"""
入口逻辑
"""
while True:
self.__display_menu()
self.__select_menu()
def __input_student(self):
"""
将用户输的信息增加到列表中
"""
name = input("please enter name:")
age = int(input("please enter age:"))
score = int(input("please enter score:"))
stu = StudentModel(name, age, score)
self.__manager.add_student(stu)
def __output_students(self, list_output):
"""
显示所有学生信息
:param list_output:用户输入信息存储的列表
"""
for i in list_output:
StudentModel.output_student_info(i)
def __delete_student(self):
"""
删除学生信息，根据ID
"""
i = int(input("please enter delete ID:"))
self.__manager.remove_student(i)
def __modify_student(self):
"""
修改学生信息
"""
id = int(input("please enter delete ID:"))
name = input("please enter name:")
age = int(input("please enter age:"))
score = int(input("please enter score:"))
stu = StudentModel(name, age, score, id)
self.__manager.update_student(stu)
def __output_student_by_score(self):
"""
升序成绩显示所有
"""
list_target = self.__manager.order_by_score()
self.__output_students(list_target)
class StudentManagerView:
"""
界面视图类
"""
def __init__(self):
# 创建逻辑控制器对象
self.__manager = StudentManagerController()
def __input_students(self):
# 1. 在控制台中录入学生信息,存成学生对象StudentModel.
stu = StudentModel()
stu.name = input("请输入姓名:")
stu.age = self.__input_int('年龄')
stu.score = self.__input_int('分数')
# 2. 调用逻辑控制器的add_student方法
self.__manager.add_student(stu)
print(self.__manager)
def __output_students(self, list_target):
"""
显示学生列表信息
:return:
"""
# for stu in self.__manager.list_stu:
for stu in list_target:
print("%d -- %s -- %d -- %d" %
(stu.id, stu.name, stu.age, stu.score))
def __output_student_by_score(self):
"""
根据成绩显示所有学生信息
:return:
"""
list_target = self.__manager.order_by_score()
self.__output_students(list_target)
def __delete_student(self):
id = self.__input_int('编号')
if self.__manager.remove_student(id):
print("删除成功")
else:
print("删除失败")
def __modify_student(self):
"""
修改学生信息
:return:
"""
stu = StudentModel()
stu.id = self.__input_int('编号')
stu.name = input("请输入姓名:")
stu.age = self.__input_int('年龄')
stu.score = self.__input_int('分数')
if self.__manager.update_student(stu):
print("修改成功")
else:
print("更新失败")
def __display_menu(self):
"""
显示菜单
:return:
"""
print("1) 添加学生")
print("2) 显示学生")
print("3) 删除学生")
print("4) 修改学生")
print("5) 按照成绩降序排列")
def __select_menu(self):
"""
选择菜单
:return:
"""
number = input("请输入选项:")
if number == "1":
self.__input_students()
elif number == "2":
self.__output_students(self.__manager.list_stu)
elif number == "3":
self.__delete_student()
elif number == "4":
self.__modify_student()
elif number == "5":
self.__output_student_by_score()
def __input_int(self, value):
while True:
try:
score = int(input('请输入你的%s' % value))
except Exception:
continue
if 0 < score < 100:
return score
def main(self):
"""
界面入口方法
:return:
"""
while True:
self.__display_menu()
self.__select_menu()
class StudentManagerView:
"""
学生管理器视图类
"""
def __init__(self):
# 创建学生管理控制器对象
self.__controller = StudentManagerController()
def __display_menu(self):
"""
显示菜单
:return:
"""
print("---------------------")
print("1)添加学生")
print("2)显示学生")
print("3)删除学生")
print("4)修改学生")
print("5)按照成绩降序显示")
print("---------------------")
def __select_menu(self):
"""
选择菜单
:return:
"""
number = input("请输入选项：")
if number == "1":
self.input_student()
elif number =="2":
self.__out_put_students(self.__controller.list_stu)
elif number == "3":
self.del_student()
elif number == "4":
self.xiugai_student()
elif number == "5":
self.order_score()
def main(self):
"""
学生管理器入口
:return:
"""
while True:
self.__display_menu()
self.__select_menu()
def input_student(self):
while True:
stu = StudentModel()
stu.name = input("请输入姓名")
stu.age = int(input("请输入年龄"))
stu.score = int(input("请输入成绩"))
self.__controller.add_student(stu)
if input("按Y继续") != "Y":
break
def __out_put_students(self,list_stu):
for item in list_stu:
print("%d|%s|%d|%d "%(item.id,item.name,item.age,item.score))
def del_student(self):
while True:
stu = StudentModel()
Num = int(input("请输入ID："))
self.__controller.remove_student(Num)
if input("按Y继续") != "Y":
break
def xiugai_student(self):
stu_info = StudentModel()
stu_info.id=int(input("请输入你要修改的Id："))
stu_info.name= str(input("请输入你要修改的名字："))
stu_info.age= int(input("请输入你要修改的年纪："))
stu_info.score=(int(input("请输入你要修改的分数：")))
if self.__controller.update_student(stu_info):
print("修改成功")
else:
print("修改失败")
class StudentManagerView:
"""
学生管理视图:主要负责界面逻辑
"""
def __init__(self):
self.__controller = StudentManagerController()
def __display_menu(self):
print("1）添加学生信息")
print("2）显示学生信息")
print("3）删除学生信息")
print("4）修改学生信息")
print("5）根据成绩升序排列")
def __select_menu(self):
item = input("请输入选项：")
if item == "1":
self.__input_students()
elif item == "2":
self.__output_students()
elif item == "3":
self.__delete_student()
elif item == "4":
self.__modify_student()
elif item == "5":
self.__output_students_order_by_score()
def main(self):
"""
程序入口方法
"""
while True:
self.__display_menu()
self.__select_menu()
def __input_students(self):
name = input("请输入学生姓名：")
score = self.__input_integer("请输入学生成绩：")
age = self.__input_integer("请输入学生年龄：")
stu = StudentModel(name, age, score)
self.__controller.add_student(stu)
def __input_integer(self, message):
while True:
try:
return int(input(message))
except:
print("输入有误")
def __output_students(self):
for item in self.__controller.stu_list:
print("编号是:%d,姓名是%s,年龄是%d,成绩是%d." %
(item.id, item.name, item.atk, item.score))
def __delete_student(self):
# stu_id = int(input("请输入编号："))
stu_id = self.__input_integer("请输入编号：")
if self.__controller.remove_student(stu_id):
print("删除成功")
else:
print("删除失败")
def __modify_student(self):
stu = StudentModel()
stu.id = self.__input_integer("请输入需要修改的学生编号：")
stu.name = input("请输入需要修改的学生姓名：")
stu.age = self.__input_integer("请输入需要修改的学生年龄：")
stu.score = self.__input_integer("请输入需要修改的学生成绩：")
if self.__controller.update_student(stu):
print("修改成功")
else:
print("修改失败")
def __output_students_order_by_score(self):
self.__controller.order_by_score()
self.__output_students()
class StudentManagerView:
"""
学生管理视图：主要负责界面逻辑
"""
def __init__(self):
self.__controller = StudentManagerController()
def __display_menu(self):
print("1) 添加学生信息" + "\n" + "2) 显示学生信息" + "\n" + "3) 删除学生信息" + "\n" +
"4) 修改学生信息" + "\n" + "5) 根据成绩升序排列" + "\n" + "6) 结束所有操作并清除数据")
def __select_menu(self):
"""
用户选择界面
:return: True表示结束所有操作并清除数据。
"""
order_index = input("请输入您的指令选项: ")
if order_index == "1":
self.__input_students()
return False
elif order_index == "2":
self.__output_students(self.__controller.stu_list)
return False
elif order_index == "3":
self.__delete_student()
return False
elif order_index == "4":
self.__modify_student()
return False
elif order_index == "5":
self.__output_students_order_by_score()
return False
elif order_index == "6":
print("感谢您的使用！")
return True
else:
print("指令错误！请重新输入指令！")
self.__select_menu()
return False
def __input_students(self):
"""
添加新学生信息
"""
name = input("请输入学生的姓名，输入\"end\"结束添加过程：")
if name == "end":
print("添加完成！")
return
age = self.__input_integer("请输入学生的年龄：")
score = self.__input_integer("请输入学生的成绩：")
new_stu = StudentModel(name, age, score)
self.__controller.add_student(new_stu)
self.__input_students()
def __input_integer(self, message):
while True:
try:
return int(input(message))
except:
print("输入有误")
def __output_students(self, stu_list):
"""
显示已存学生信息。
"""
if self.__controller.check_empty():
print("列表中无学生信息。")
else:
for student in stu_list:
print("学生id：%d, 姓名：%s, 年龄：%d, 成绩：%d" %
(student.id, student.name, student.age, student.score))
def __delete_student(self):
"""
根据学生姓名删除学生信息。
"""
stu_name = input("请输入需要删除学生的姓名：")
stu_id = self.__controller.search_student_id(stu_name)
if self.__controller.remove_student(stu_id) == True:
print("成功删除%s的信息" % (stu_name))
def __modify_student(self):
"""
根据学生id更新学生信息。
"""
new_stu = StudentModel()
new_stu.id = self.__input_integer("请输入学生的id：")
new_stu.name = input("请输入学生的姓名：")
new_stu.age = self.__input_integer("请输入学生的年龄：")
new_stu.score = self.__input_integer("请输入学生的成绩：")
if self.__controller.update_student(new_stu):
print("修改成功！")
else:
print("修改失败！")
def __output_students_order_by_score(self):
"""
将学生成绩升序排序后显示所有学生信息。
"""
temp_student_list = self.__controller.order_by_score()
self.__output_students(temp_student_list)
def main(self):
while True:
self.__display_menu()
if self.__select_menu():
break
class StudentManagerView:
"""
视图
"""
def __init__(self):
self.__controller = StudentManagerController()
def main(self):
while True:
self.__display_menu()
self.__select_menu()
def __display_menu(self):
print("1)添加学生")
print("2)显示学生")
print("3)删除学生")
print("4)修改学生")
print("5)根据成绩升序显示学生")
def __select_menu(self):
item = input("请输入选项：")
if item == "1":
self.__input_students()
elif item == "2":
self.__output_students()
elif item == "3":
self.__delete_student()
elif item == "4":
self.__modify_student()
elif item == "5":
self.__output_students_by_score()
# 这里是为了处理异常的函数
def __input_number(self, message):
while True:
try:
number = int(input(message))
return number
except:
print("输入有误，请重新输入")
def __input_students(self):
# 循环获取信息
while True:
name = input("请输入姓名：")
if name == "":
break
age = self.__input_number("请输入年龄：")
score = self.__input_number("请输入成绩：")
stu = StudentModel(name, age, score)
# 将学生信息交给Controller中的add_student方法
return self.__controller.add_student(stu)
# 显示学生__output_students
def __output_students(self):
for item in self.__controller.stu_list:
print(item.id, item.name, item.age, item.score)
# 删除学生__delete_student
def __delete_student(self):
stu_id = self.__input_number("请输入需要删除的学生编号：")
if self.__controller.remove_student(stu_id):
print("删除成功")
else:
print("删除失败")
def __modify_student(self):
stu = model.StudentModel()
stu.id = self.__input_number("请输入编号：")
stu.name = input("请输入姓名：")
stu.age = self.__input_number("请输入年龄：")
stu.score = self.__input_number("请输入成绩：")
if self.__controller.update_student(stu):
print("修改成功")
else:
print("修改失败")
def __output_students_by_score(self):
self.__controller.order_by_score()
self.__output_students()
class StudentManagerView:
def __init__(self):
self.__manager = StudentManagerController()
def __display_menu(self):
print("1)添加学生")
print("2)显示学生")
print("3)删除学生")
print("4)修改学生")
print("5)按照成绩升序显示学生")
def __select_menu(self):
item = input("请输入：")
if item == "1":
self.__input_student()
elif item == "2":
self.__output_student(self.__manager.stu_list)
elif item == "3":
self.__delete_student()
elif item == "4":
self.__modify_student()
else:
self.__output_student_by_score()
def __input_student(self):
name = input("请输入姓名：")
age = self.input_data("请输入年龄：")
score = self.input_data("请输入成绩：")
stu = StudentModel(name, age, score)
self.__manager.add_student(stu)
def input_data(self, message):
while True:
try:
input_data = int(input(message))
return input_data
except:
print("输入有误，请重新输入！")
continue
def __output_student(self, list_output):
for item in list_output:
print(item.id, item.name, item.age, item.score)
def __delete_student(self):
id = self.input_data("请输入待删除的学生编号：")
if self.__manager.remove_student(id):
print("删除成功")
else:
print("删除失败")
def __modify_student(self):
stu = StudentModel()
stu.id = self.input_data("请输入待修改学生编号：")
stu.name = input("请输入姓名：")
stu.age = self.input_data("请输入年龄：")
stu.score = self.input_data("请输入成绩：")
if self.__manager.update_student(stu):
print("修改成功")
else:
print("修改失败")
def __output_student_by_score(self):
self.__manager.order_by_score()
self.__output_student(self.__manager.stu_list)
def main(self):
while True:
self.__display_menu()
self.__select_menu()