python的图书管理系统

一个基本的图书管理系统应该包含以下功能：

1. 添加书籍：可以添加书籍信息，包括书名、作者、出版社、出版日期、ISBN等

2. 删除书籍：可以通过书籍的ISBN或者书名删除书籍

3. 查找书籍：可以通过书籍的ISBN或者书名查找书籍

4. 显示所有书籍：可以显示所有的书籍信息

5. 借出书籍：可以将某本书的状态改为已借出，并记录借书人和借书日期

6. 归还书籍：可以将某本书的状态改为已归还，并记录归还日期

基于以上需求，可以使用Python编写一个简单的图书管理系统。下面是一个示例代码：

class Book:
    def __init__(self, title, author, publisher, publish_date, isbn, status='available', borrower=None, borrow_date=None, return_date=None):
        self.title = title
        self.author = author
        self.publisher = publisher
        self.publish_date = publish_date
        self.isbn = isbn
        self.status = status
        self.borrower = borrower
        self.borrow_date = borrow_date
        self.return_date = return_date

class Library:
    books = []

    def add_book(self, book):
        self.books.append(book)

    def remove_book(self, title_or_isbn):
        for book in self.books:
            if book.title == title_or_isbn or book.isbn == title_or_isbn:
                self.books.remove(book)

    def find_book(self, title_or_isbn):
        for book in self.books:
            if book.title == title_or_isbn or book.isbn == title_or_isbn:
                return book
        return None

    def display_books(self):
        for book in self.books:
            print(f'{book.title} by {book.author} ({book.status})')

    def borrow_book(self, title_or_isbn, borrower, borrow_date):
        book = self.find_book(title_or_isbn)
        if book:
            if book.status == 'available':
                book.status = 'borrowed'
                book.borrower = borrower
                book.borrow_date = borrow_date
                print(f'{book.title} has been borrowed by {borrower}.')
            else:
                print(f'{book.title} is not available.')
        else:
            print('Book not found.')

    def return_book(self, title_or_isbn, return_date):
        book = self.find_book(title_or_isbn)
        if book:
            if book.status == 'borrowed':
                book.status = 'available'
                book.borrower = None
                book.borrow_date = None
                book.return_date = return_date
                print(f'{book.title} has been returned.')
            else:
                print(f'{book.title} is not borrowed.')
        else:
            print('Book not found.')

if __name__ == '__main__':
    lib = Library()

    book1 = Book('Python for Data Science Handbook', 'Jake VanderPlas', 'O\'Reilly Media', '2016-11-21', '978-1491912058')
    book2 = Book('Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow', 'Aurélien Géron', 'O\'Reilly Media', '2019-10-15', '978-1492032649')
    book3 = Book('Deep Learning with Python', 'François Chollet', 'Manning Publications', '2017-10-28', '978-1617294433')

    lib.add_book(book1)
    lib.add_book(book2)
    lib.add_book(book3)

    lib.display_books()

    lib.borrow_book('Python for Data Science Handbook', 'John Doe', '2021-01-01')

    lib.return_book('Python for Data Science Handbook', '2021-01-15')

    lib.display_books()

这个示例代码实现了添加、删除、查找和显示所有书籍的功能，以及借出和归还书籍的功能。您可以根据自己的需求进行适当的修改和扩展。