class Book():'''书类，存储书名，作者，分类，价格等信息'''def __init__(self,name,author,classify,price):self.name = nameself.author = authorself.classify = classifyself.price = pricedef get_bookinfo(self):print('书名：%s\n作者：%s\n分类：%s\n价格：%s'%(self.name,self.author,self.classify,self.price))def set_book_name(self,new_name):self.name = new_namedef get_book_name(self):#获取书名return self.namedef get_book_author(self):#获取书作者return self.authordef get_book_classify(self):#获取书分类return self.classfiydef get_book_price(self):#获取书的价格return self.price

class Library():'''图书馆，实现借书，入库，还书，查书等功能，使用序列化存储书的实例'''import pickle as pwith open(r'C:\Users\何发奋\Desktop\Python 习题\instance\book_library.txt','rb') as f:#序列化信息存储地址try:book_total_library = p.load(f)#存储所有的书book_in_library =p.load(f)#存储未被借出的书out_library = p.load(f)#存储被借出的书的信息，包括借书人以及借书日期except:book_total_library = []book_in_library =[]out_library = {}

def add():'''加书'''import pickle as pbook_name = input('请输入书名:')author_name = input('请输入author:')classify = input('请输入classify:')price = input('请输入price:')book = Book(book_name,author_name,classify,price)Library.book_total_library.append(book)Library.book_in_library.append(book)#将书籍加入本馆总库以及在库图书列表with open(r'C:\Users\何发奋\Desktop\Python 习题\instance\book_library.txt','wb') as fp:p.dump(Library.book_total_library,fp)p.dump(Library.book_in_library,fp)p.dump(Library.out_library,fp)#将修改的数据记录入序列化

def borrow(self,username,book_name):'''借书'''import pickle as pimport timecurrent_date = time.strftime('%Y-%m-%d',time.localtime())#print(Library.book_in_library)#print(Library.out_library)for book_object1 in Library.book_total_library:if book_object1.get_book_name() == book_name:for book_object2 in Library.book_in_library:#print(book_object2)#print(book_object2.get_book_name())if book_object2.get_book_name() ==book_name:print('object2：',book_object2)#查找图书在本馆，且未被借出Library.out_library[book_object2] = (username,current_date)#记录图书已经被借出，登记出借信息
                        Library.book_in_library.remove(book_object2)#print(Library.book_in_library)#print(Library.out_library)#修改在库图书记录，记录当前图书已被借出，不在库print('借书成功，请及时归还')with open(r'C:\Users\何发奋\Desktop\Python 习题\instance\book_library.txt','wb') as fp:p.dump(Library.book_total_library,fp)p.dump(Library.book_in_library,fp)p.dump(Library.out_library,fp)#序列化记录修改记录print()returnelse:#本馆有此书，但是已被借走print('您要的书已被借走，您可通过book_info查看已被借阅的信息')print()return#如果图书在本馆，但是已被借出，提示已被借走else:print('您所要借阅的书本馆尚无，请去其他图书馆看看')print()#如果本馆无此图书，提示

def lend(self,book_name):'''还书'''import pickle as pfor book_object in Library.out_library.keys():print(book_object.get_book_name())if book_name ==book_object.get_book_name():Library.book_in_library.append(book_object)del Library.out_library[book_object]#删除出借记录with open(r'C:\Users\何发奋\Desktop\Python 习题\instance\book_library.txt','wb') as fp:p.dump(Library.book_total_library,fp)p.dump(Library.book_in_library,fp)p.dump(Library.out_library,fp)print('还书成功！')print()return#如果查到对应的借出记录，则记录归还记录else:print('未查到借阅记录，请确认是否是在本馆借的书')print()#如果未查到对应的借出记录不做操作

def info_all(self):#所有书籍import pickle as pif Library.book_total_library:print('*'*80)for item in Library.book_total_library:item.get_bookinfo()print('-'*80)print(' '*80)def info_ready(self):#在库书籍if Library.book_in_library:print('-'*80)for item in Library.book_in_library:item.get_bookinfo()print('-'*80)print(' '*80)else:print('当前无可借书籍')print(' '*80)def info_borrow(self):#已被出借书籍if Library.out_library:print('*'*80)for item in Library.out_library:item.get_bookinfo()print('-'*80)print(' '*80)else:print('无被借阅记录')print(' '*80)

if __name__ == '__main__':#import operatorwhile 1:command = input('欢迎光临小何图书馆请输入命令：\nadd：增加图书\nborrow：借阅图书\nlend：还书\ninfo_all：查看库中图书列表\ninfo_ready：查看在库图书列表\ninfo_borrow：查看借出图书列表\nsearch：查找图书\nexit：退出\n')if command.strip().lower() == 'add':exec('xh_library.add()')elif command.strip().lower() == 'borrow':user_name = input('请输入用户名：')book_name = input('请输入书名：')temp = 'xh_library.borrow(%s,%s)'%(user_name,book_name)print(temp)exec('xh_library.borrow("%s","%s")'%(user_name,book_name))elif command.strip().lower() == 'lend':book_input = input('请输入要还的书名：')exec('xh_library.lend("%s")'% book_input)elif command.strip().lower() == 'info_all':exec('xh_library.info_all()')elif command.strip().lower() == 'info_ready':exec('xh_library.info_ready()')elif command.strip().lower() == 'info_borrow':#print('catch')exec('xh_library.info_borrow()')elif command.strip().lower() == 'exit':break