知识回顾

  1 #!/usr/bin/env python3
  2 #-*- coding:utf-8 -*-
  3 '''
  4 Administrator 
  5 2018/8/14 
  6 '''
  7 import pickle,os,uuid
  8 class School:
  9     def __init__(self,name):
 10         self.name=name
 11         self.school_id=uuid.uuid1()
 12 
 13     def save(self):
 14 
 15         file_address=os.path.join(os.path.dirname(os.path.abspath(__file__)),"accounts","db_school","%s.txt"%self.school_id)
 16         with open(file_address,"wb") as f:
 17             pickle.dump(self,f)
 18     @staticmethod
 19     def get_all():
 20         obj_list=[]
 21         address=os.path.join(os.path.dirname(os.path.abspath(__file__)),"accounts","db_school")
 22         for item in os.listdir(address): #/home/tom/下找所有的文件
 23             item=os.path.join(address,item)
 24             with open(item,"rb") as f:
 25                 obj=pickle.load(f)
 26             if type(obj) is School:#里面存的数据多。如果是学校类型，则筛选出来
 27                 obj_list.append(obj)
 28             # obj_list.append(obj)
 29         return obj_list
 30 
 31     def __str__(self):
 32         return "学校的名称是:%s"%self.name
 33 
 34 
 35 class Classes:
 36     def __init__(self,name):
 37         self.name=name
 38         self.nid=uuid.uuid1()
 39     def save(self):
 40         file_address=os.path.join(os.path.dirname(os.path.abspath(__file__)),"accounts","db_classes","%s.txt"%self.nid)
 41         with open(file_address,"wb") as f:
 42             pickle.dump(self,f)
 43     @staticmethod
 44     def get_all():
 45         obj_list = []
 46         address = os.path.join(os.path.dirname(os.path.abspath(__file__)), "accounts","db_classes")
 47         for item in os.listdir(address):  # /home/tom/下找所有的文件
 48             item = os.path.join(address, item)
 49             with open(item, "rb") as f:
 50                 obj = pickle.load(f)
 51             if type(obj) is Classes:  # 里面存的数据多。如果是学校类型，则筛选出来
 52                 obj_list.append(obj)
 53         return obj_list
 54     def __str__(self):
 55         return "班级:%s"%self.name
 56 
 57 
 58 class Student:
 59     def __init__(self,name,classes_obj):
 60         self.name=name
 61         # 班级名称可能存在重复，我们需要唯一字段，所以这里改成班级对象。这是唯一的。
 62         #如果保存班级，程序中，班级对象保存了两次。
 63         self.classesObj=classes_obj
 64         self.student_id=uuid.uuid1()
 65     def save(self):#此处班级对象保存了两次。数据安全性
 66         file_address = os.path.join(os.path.dirname(os.path.abspath(__file__)), "accounts","db_student","%s.txt" % self.student_id)
 67         with open(file_address, "wb") as f:
 68             pickle.dump(self, f)
 69 
 70     @staticmethod
 71     def get_all():
 72         obj_list = []
 73         address = os.path.join(os.path.dirname(os.path.abspath(__file__)), "accounts", "db_student")
 74         for item in os.listdir(address):  # /home/tom/下找所有的文件
 75             item = os.path.join(address, item)
 76             with open(item, "rb") as f:
 77                 obj = pickle.load(f)
 78             if type(obj) is Student:  # 里面存的数据多。如果是学校类型，则筛选出来
 79                 obj_list.append(obj)
 80         return obj_list
 81 
 82     def __str__(self):
 83         return "姓名:%s, %s" % (self.name,self.classesObj.get_obj_by_nid())
 84 
 85 class Nid:
 86     def __init__(self,class_nid):
 87         self.nid=class_nid
 88     def get_obj_by_nid(self):
 89         address = os.path.join(os.path.dirname(os.path.abspath(__file__)), "accounts")
 90         flag = True
 91         for i in os.listdir(address):
 92             file_address=os.path.join(address,i)
 93             if flag:
 94                 for j in os.listdir(file_address):
 95                     file_name=os.path.splitext(j)[0] #拿到文件名，不带扩展名
 96                     if file_name==str(self.nid):
 97                         new_address=os.path.join(file_address,j)
 98                         with open(new_address,"rb") as f:
 99                             data=pickle.load(f)
100                         return data
101 
102 
103 # s1=School("上海")
104 # s1.save()
105 # # # #/home/tom/1
106 # s2=School("北京")
107 # s2.save()
108 # #/home/tom/2
109 
110 # School_obj_list=School.get_all()
111 # for obj in School_obj_list:
112 #     #print("学校名称：%s"%obj.name)
113 #     print(obj)
114 # c1=Classes("全栈1班")
115 # c1.save()
116 # c2=Classes("全栈2班")
117 # c2.save()
118 
119 # Classes_obj_list=Classes.get_all()
120 # for i in Classes_obj_list:
121 #     #print("学校名称：%s"%obj.name)
122 #     print(i)
123 #
124 # School_obj_list=School.get_all()
125 # for obj in School_obj_list:
126 #     #print("学校名称：%s"%obj.name)
127 #     print(obj)
128 ##########创建学员############
129 # classes_obj_list=Classes.get_all()
130 # print("chakan ",classes_obj_list)
131 # for i,j in enumerate(classes_obj_list,1):
132 #     print(i,">>>>",j)
133 # # print(classes_obj_list[0])
134 #
135 # sel=input("请输入班级索引号：")
136 # name=input("请输入学生姓名：")
137 # if sel.isdigit():
138 #     sel=int(sel)
139 #     if sel>0 and sel<=len(classes_obj_list):
140 #         class_obj=classes_obj_list[sel-1]
141 #         student_obj=Student(name,Nid(class_obj.nid))#chuanjian
142 #         print(student_obj)
143 #         student_obj.save()
144 
145 # Nid(class_obj.nid).get_obj_by_nid()
146 # obj.classesObj.get_obj_by_nid()
147 
148 Student_obj_list=Student.get_all()
149 for obj in Student_obj_list:
150     #print("学校名称：%s"%obj.name)
151     print(obj)
152     # print(obj.classesObj.get_obj_by_nid())