用python写一个完整的图书管理系统

好的，下面是一个完整的图书管理系统的示例代码：

# 定义图书类
class Book:
    def __init__(self, title, author, publisher, pages):
        self.title = title
        self.author = author
        self.publisher = publisher
        self.pages = pages
        self.borrowed = False
        self.borrowed_by = None

# 定义图书馆类
class Library:
    def __init__(self):
        self.books = []

    # 添加图书
    def add_book(self, book):
        self.books.append(book)

    # 借出图书
    def borrow_book(self, title, borrower):
        for book in self.books:
            if book.title == title and not book.borrowed:
                book.borrowed = True
                book.borrowed_by = borrower
                return True
        return False

    # 归还图书
    def return_book(self, title):
        for book in self.books:
            if book.title == title and book.borrowed:
                book.borrowed = False
                book.borrowed_by = None
                return True
        return False

# 创建图书馆对象
library = Library()

# 创建图书对象并添加到图书馆
book1 = Book("Python入门", "John Smith", "Python Press", 250)
book2 = Book("Java入门", "Jane Smith", "Java Press", 300)
book3 = Book("C++入门", "Bob Smith", "C++ Press", 200)
library.add_book(book1)
library.add_book(book2)
library.add_book(book3)

# 借出图书
if library.borrow_book("Python入门", "张三"):
    print("借书成功")
else:
    print("借书失败")

# 归还图书
if library.return_book("Python入门"):
    print("还书成功")
else:
    print("还书失败")

在这个示例代码中，我们定义了两个类：`Book` 类和 `Library` 类。`Book` 类用于表示图书，包含图书的标题、作者、出版社、页数、是否被借出以