class Book:   def __init__(self, name, author, comment, state = 0):  
self.name = name  
self.author = author  
self.comment = comment  
self.state = state   def __str__(self):  
status = '未借出'  
if self.state == 1:  
status = '已借出'  
return '名称：《%s》 作者：%s 推荐语：%s\n状态：%s ' % (self.name, self.author, self.comment, status)   class BookManager:
 
authors = []  
def __init__(self):  
book1 = Book('撒哈拉的故事','三毛','我每想你一次，天上便落下一粒沙，从此便有了撒哈拉。')  
book2 = Book('梦里花落知多少','三毛','人人都曾拥有荷西，虽然他终会离去。')  
book3 = Book('月亮与六便士','毛姆','满地都是六便士，他却抬头看见了月亮。')  
self.books = [book1,book2,book3]  
self.authors.append(book1.author)  
self.authors.append(book2.author)  
self.authors.append(book3.author)   def menu(self):  
while True:  
print('1.查询书籍')  
choice = int(input('请输入数字选择对应的功能：'))  
if choice == 1:  
self.show_author_book()  
else:  
print('感谢使用！')  
break   def show_author_book(self):  
author = input('请输入想查询作家的名称：')  
==if author in self.authors:==  
==print(author + '====的作品有：====')==  
==for book in self.books:==  
==if book.author == author:==  
print(book)  
else:  
print('很可惜，我们暂时没有收录这位作者的作品')
 
manager = BookManager()  
manager.menu()