python

python

class Book:

   def __init__(self,title,author,year):

       self.title = title

       self.author = author

       self.year = year

class Library:

   def __init__(self):

       self.books = []

   def add_book(self,book):

       self.books.append(book)

   def remove_book(self,book):

       self.books.remove(book)

   def search_book_by_title(self,title):

       for book in self.books:

           if book.title == title:

               return book

       return None

   def search_book_by_author(self,author):

       found_books = []

       for book in self.books:

           if book.author == author:

               found_books.append(book)

       return found_books

# 示例使用

library = Library()

book1 = Book("Python Crash Course", "Eric Matthes", 2016)

book2 = Book("Clean Code", "Robert C.Martin", 2008)

book3 = Book("The Pragmatic Programmer", "Andrew Hunt,David Thomas", 1999)

library.add_book(book1)

library.add_book(book2)

library.add_book(book3)

search_title = "Clean Code"

found_book = library.search_book_by_title(search_title)

if found_book:

   print("找到了书籍：", found_book.title)

else:

   print("未找到书籍：", search_title)

search_author = "Robert C.Martin"

found_books = library.search_book_by_author(search_author)

if found_books:

   print("找到了以下作者的书籍：")

   for book in found_books:

       print(book.title)

else:

   print("未找到作者：", search_author)