python_案例综合：教材记录管理

  1 class Book():
  2     def __init__(self,ISBN,Ftile,Author,Publisher):
  3         self.ISBN = ISBN
  4         self.Ftile = Ftile
  5         self.Author = Author
  6         self.Publisher = Publisher
  7 
  8     def show(self):
  9         print(self.ISBN,self.Ftile,self.Author,self.Publisher)
 10 
 11 class BookList():
 12     def __init__(self):
 13         self.books = []
 14 
 15     def show(self):
 16         print(self.ISBN, self.Ftile, self.Author, self.Publisher)
 17         for i in self.books:
 18             self.show()
 19 
 20     def __insert(self,s):
 21         i = 0
 22         while(i<len(self.books) and s.ISBN > self.books[i]):
 23             i=i+1
 24         self.books.insert(i,s)#指定位置添加一个元素
 25         print("ok")
 26 
 27     def __update(self,s):
 28         i = 0
 29         while(i<len(self.books) and s.ISBN != self.books[i]):
 30             i=i+1
 31         if(s.ISBN==self.books[i]):
 32             del self.books[i]
 33             self.books.insert(i,s)
 34             print("-- update @ ok --")
 35         else:
 36             print("--error--")
 37 
 38     def __delete(self):
 39         while(i<len(self.books) and s.ISBN != self.books[1]):
 40             i=i+1
 41         if(s.ISBN ==self.books[i]):
 42             del self.books[i]
 43             print("-- delete @ ok --")
 44         else:
 45             print("--error--")
 46 
 47     def insert(self):
 48         ISBN = input('ISBN:')
 49         Ftile = input('Ftile:')
 50         Author = input('Author:')
 51         Publisher = input('Publisher:')
 52         if (ISBN!='' and Ftile!=''):
 53               self.__insert(Book(ISBN,Ftile,Author,Publisher))
 54         else:
 55             print("--ISBN/Ftile^error--")
 56 
 57     def update(self):
 58         ISBN = input('ISBN:')
 59         Ftile = input('Ftile:')
 60         Author = input('Author:')
 61         Publisher = input('Publisher:')
 62         if (ISBN != '' or Ftile != '' or Author!='' or Publisher!=''):
 63             self.__update(Book(ISBN, Ftile, Author, Publisher))
 64         else:
 65             print("---error---")
 66 
 67     def delete(self):
 68         ISBN = input('ISBN:')
 69         Ftile = input('Ftile:')
 70         Author = input('Author:')
 71         Publisher = input('Publisher:')
 72         if (ISBN != '' or Ftile != '' or Author != '' or Publisher != ''):
 73             self.__delete(Book(ISBN, Ftile, Author, Publisher))
 74         else:
 75             print("---error---")
 76 
 77     def scan(self):
 78         while True:
 79             s = input(">>>")
 80             if s=='show':
 81                 self.show()
 82             elif s=='insert':
 83                 self.insert()
 84             elif s=='update':
 85                 self.update()
 86             elif s=='delete':
 87                 self.delete()
 88             elif s=='exit':
 89                 break
 90             else:
 91                 print(" ---- Error ---- ")
 92                 return 0
 93         self.File()
 94         #print(self.books)   》》》》[<__main__.Book object at 0x0000020B3A08CFD0>]
 95 
 96     def File(self):
 97         f = open('jiaocai.txt','wt+',encoding = 'utf-8')
 98         for i in self.books:
 99             f.write(i.ISBN+'\n')
100             f.write(i.Ftile+'\n')
101             f.write(i.Author+'\n')
102             f.write(i.Publisher+'\n')
103         #books = self.books
104         #f.write(str(books))#不可用
105         f.close()
106 
107 Bl=BookList()
108 Bl.scan()
109 #print(BookList.books)