├── MVC.py
├── README.md
├── file.py
├── main.py
├── menu.py
├── sorted.py
└── stu_info.py


/MVC.py:
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  1 | """
  2 | 学生管理
  3 | """
  4 | #存储学生信息name age score id
  5 | class StudentModel:
  6 |     def __init__(self,name="",age=0,score=0,id=1):
  7 |         self.name=name
  8 |         self.age=age
  9 |         self.score=score
 10 |         self.id=id
 11 | 
 12 | 
 13 | class StudentController:
 14 |     #公用的变量--类变量
 15 |     stu_id=1
 16 | 
 17 |     def __init__(self):
 18 |         self.__stu_list=[]
 19 | 
 20 |     @classmethod
 21 |     def __generate_id(cls,stu):
 22 |         stu.id=cls.stu_id
 23 |         #每插入一个学生增加1
 24 |         cls.stu_id+=1
 25 | 
 26 |     def insert_student(self):
 27 |         name=input('name:')
 28 |         age=int(input('age:'))
 29 |         score=int(input('score:'))
 30 |         id=int(input('id:'))
 31 |         #得到一个学生
 32 |         stu=StudentModel(name=name,age=age,score=score,id=id)
 33 |         StudentController.__generate_id(stu)
 34 |         #添加学生
 35 |         self.__stu_list.append(stu)
 36 |         print(self.__stu_list)
 37 |         self.show_student()
 38 | 
 39 |     def show_student(self):
 40 |         for item in self.__stu_list:
 41 |             print('ID:%d-name:%s-age:%d-score:%d'%(item.id,item.name,item.age,item.score))
 42 | 
 43 |     def delete_student(self):
 44 |         name = input('delete name:')
 45 |         for item in self.__stu_list:
 46 |             if item.name==name:
 47 |                 self.__stu_list.remove(item)
 48 |                 print('delete success')
 49 |                 break
 50 |         self.show_student()
 51 | 
 52 |     def change_student(self):
 53 |         #获取索引 lst.index('xxx')
 54 |         name=input('change name:')
 55 |         for item in self.__stu_list:
 56 |             if item.name==name:
 57 |                 score=int(input('change score:'))
 58 |                 item.score=score
 59 | 
 60 |         self.show_student()
 61 | 
 62 |     def sort_student(self):
 63 |         for i in range(len(self.__stu_list)-1):
 64 |             for j in range(len(self.__stu_list)-i-1):
 65 |                 if self.__stu_list[j].score>self.__stu_list[j+1].score:
 66 |                     self.__stu_list[j],self.__stu_list[j+1]=self.__stu_list[j+1],self.__stu_list[j]
 67 | 
 68 |         self.show_student()
 69 | 
 70 | class StudentView:
 71 |     def __init__(self):
 72 |         self.controller=StudentController()
 73 | 
 74 |     # 私有方法
 75 |     def __display_menu(self):
 76 |         print("""
 77 |         1) 添加学生信息
 78 |         2) 显示学生信息
 79 |         3) 删除学生信息
 80 |         4) 修改学生成绩
 81 |         5) 学生成绩升序排序 
 82 |         """)
 83 | 
 84 |     def __select_menu(self):
 85 |         cmd=input('请输入选项:')
 86 |         if cmd == '1':
 87 |             self.controller.insert_student()
 88 | 
 89 |         elif cmd == '2':
 90 |             self.controller.show_student()
 91 |         elif cmd == '3':
 92 |             self.controller.delete_student()
 93 |         elif cmd == '4':
 94 |             self.controller.change_student()
 95 |         elif cmd == '5':
 96 |             self.controller.sort_student()
 97 |         else:
 98 |             print('请输入正确选项')
 99 | 
100 | 
101 |     def main(self):
102 |         while True:
103 |             self.__display_menu()
104 |             #选择功能
105 |             self.__select_menu()
106 | 
107 | 
108 | 
109 | stu=StudentView()
110 | stu.main()
111 | 


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/README.md:
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 1 | 学生信息管理系统python代码实现功能：
 2 | 
 3 | +--------------------------------+
 4 | 
 5 | |  1) 添加学生信息                 |
 6 | 
 7 | |  2) 查看所有学生信息              |
 8 | 
 9 | |  3) 修改学生的成绩                |
10 | 
11 | |  4) 删除学生信息                 |
12 | 
13 | |  5) 按成绩从高至低打印学生信息      |
14 | 
15 | |  6) 按成绩从低至高打印学生信息      |
16 | 
17 | |  7) 按年龄从大到小打印学生信息      |
18 | 
19 | |  8) 按年龄从小到大打印学生信息      |
20 | 
21 | |  9) 保存信息到文件(si.txt)        |
22 | 
23 | |  10)从文件中读取数据(si.txt)      |
24 | 
25 | |  q) 退出                        |
26 | 
27 | +--------------------------------+
28 | 
29 | -------------------------------------------------------------------------
30 | 
31 | 定义模块如下：
32 | file.py  main.py  menu.py  sorted.py  stu_info.py
33 | 程序丢同一个文件夹内运行就好了
34 | 
35 | 注：要和数据库连接的话，在python3中使用pymysql和mysql数据库相联系从而对数据进行存储，或者以字典的方式存储数据来替代列表的存储方式会更好一点
36 | 


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/file.py:
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 1 | def save_file(all_info):
 2 |     f=open('si.txt','w')
 3 |     for i in all_info:
 4 |         f.write('|%s|%s|%s|\n' % (i['name'].center(20),str(i['age']).center(6),str(i['score']).center(6)))
 5 |     f.close()
 6 | 
 7 | def read_file():
 8 |     f=open('si.txt','r')
 9 |     while True:
10 |         s=f.readline()
11 |         if s=='':
12 |             break
13 |         print(s)
14 |     f.close()
15 | 


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/main.py:
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 1 | from menu import *
 2 | from stu_info import *
 3 | from sorted import *
 4 | from file import *
 5 | 
 6 | all_info=[]
 7 | while True:
 8 |     show_menu()
 9 |     num=input('请选择：')
10 |     if num=='1':
11 |         all_info=add_stu_info(all_info)        
12 |     elif num=='2':
13 |         show_stu_info(all_info)
14 |     elif num=='3':
15 |         chang_stu_info(all_info)
16 |     elif num=='4':
17 |         del_stu_info(all_info)
18 |     elif num=='5':
19 |         score_high2low(all_info)
20 |     elif num=='6':
21 |         score_low2high(all_info)
22 |     elif num=='7':
23 |         age_high2low(all_info)
24 |     elif num=='8':
25 |         age_low2high(all_info)
26 |     elif num=='9':
27 |         save_file(all_info)
28 |     elif num=='10':
29 |         read_file()
30 |     elif num=='q':    
31 |         break
32 | 


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/menu.py:
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 1 | def show_menu():
 2 |     print('+--------------------------------+')
 3 |     print('|  1) 添加学生信息                 |')
 4 |     print('|  2) 查看所有学生信息              |')
 5 |     print('|  3) 修改学生的成绩                |')
 6 |     print('|  4) 删除学生信息                 |')
 7 |     print('|  5) 按成绩从高至低打印学生信息      |')
 8 |     print('|  6) 按成绩从低至高打印学生信息      |')
 9 |     print('|  7) 按年龄从大到小打印学生信息      |')
10 |     print('|  8) 按年龄从小到大打印学生信息      |')
11 |     print('|  9) 保存信息到文件(si.txt)        |')
12 |     print('|  10)从文件中读取数据(si.txt)      |')
13 |     print('|  q) 退出                        |')
14 |     print('+--------------------------------+')
15 | 


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/sorted.py:
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 1 | def score_high2low(all_info):
 2 |     res=sorted(all_info,key=lambda all_info:all_info['score'],reverse=True)
 3 |     print('按成绩从高至低打印学生信息:')
 4 |     for n in res:
 5 |         print('|%s|%s|%s|' % (n['name'].center(20),str(n['age']).center(6),str(n['score']).center(6)))
 6 | 
 7 | def score_low2high(all_info):
 8 |     res=sorted(all_info,key=lambda all_info:all_info['score'])
 9 |     print('按成绩从低至高打印学生信息:')
10 |     for n in res:
11 |         print('|%s|%s|%s|' % (n['name'].center(20),str(n['age']).center(6),str(n['score']).center(6)))
12 | 
13 | def age_high2low(all_info):
14 |     res=sorted(all_info,key=lambda all_info:all_info['age'],reverse=True)
15 |     print('按年龄从高至低打印学生信息:')
16 |     for n in res:
17 |         print('|%s|%s|%s|' % (n['name'].center(20),str(n['age']).center(6),str(n['score']).center(6)))
18 | 
19 | def age_low2high(all_info):
20 |     res=sorted(all_info,key=lambda all_info:all_info['age'])
21 |     print('按年龄从低至高打印学生信息:')
22 |     for n in res:
23 |         print('|%s|%s|%s|' % (n['name'].center(20),str(n['age']).center(6),str(n['score']).center(6)))
24 | 


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/stu_info.py:
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 1 | def add_stu_info(all_info):
 2 |     while True:
 3 |         name=input('请输入学生姓名：')
 4 |         if not name:
 5 |             break
 6 |         age=int(input('请输入学生年龄：'))
 7 |         score=int(input('请输入学生成绩：'))
 8 |         all_info+=[{'name':name,'age':age,'score':score}]
 9 |     return all_info
10 | 
11 | def show_stu_info(all_info):
12 |     for i in all_info:
13 |         #print(i)
14 |         print('|%s|%s|%s|' % (i['name'].center(20),str(i['age']).center(6),str(i['score']).center(6)))
15 | 
16 | def chang_stu_info(all_info):
17 |     flag=0
18 |     name=input('请输入要修改信息的学生姓名：')
19 |     for j in all_info:    
20 |         if j['name']==name:
21 |             flag=1
22 |             print('****系统找到该学生的信息****')
23 |             age=int(input('请输入学生年龄：'))
24 |             score=int(input('请输入学生成绩：'))
25 |             j['age']=age
26 |             j['score']=score
27 |             print('修改后的学生信息是：','|%s|%s|%s|' % (j['name'].center(20),str(j['age']).center(6),str(j['score']).center(6)))
28 |     
29 |     if flag==0:
30 |         print('系统没有',name,'的学生信息,无法修改')
31 | 
32 | def del_stu_info(all_info):
33 |     flag=0
34 |     count=0
35 |     name=input('请输入学生姓名：')
36 |     for k in all_info:    
37 |         if k['name']==name:
38 |             del all_info[count]
39 |             flag=1
40 |             print('学生',name,'的信息已经删除')
41 |         count+=1
42 |     if flag==0:           
43 |         print('系统没有',name,'的学生信息，不需要删除')
44 | 


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