python 图书管理系统 代码

以下是一个简单的 Python 图书管理系统代码示例：

class Book:
    def __init__(self, title, author, pub_date):
        self.title = title
        self.author = author
        self.pub_date = pub_date

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(self, title):
        for book in self.books:
            if book.title == title:
                return book
        return None

    def display_books(self):
        for book in self.books:
            print(f"Title: {book.title}\nAuthor: {book.author}\nPublication Date: {book.pub_date}\n")

library = Library()

while True:
    print("1. Add Book")
    print("2. Remove Book")
    print("3. Search Book")
    print("4. Display All Books")
    print("5. Quit")

    choice = input("Enter your choice: ")

    if choice == "1":
        title = input("Enter book title: ")
        author = input("Enter author name: ")
        pub_date = input("Enter publication date (yyyy-mm-dd): ")
        book = Book(title, author, pub_date)
        library.add_book(book)
        print("Book added successfully!\n")

    elif choice == "2":
        title = input("Enter book title: ")
        book = library.search_book(title)
        if book:
            library.remove_book(book)
            print("Book removed successfully!\n")
        else:
            print("Book not found!\n")

    elif choice == "3":
        title = input("Enter book title: ")
        book = library.search_book(title)
        if book:
            print(f"Title: {book.title}\nAuthor: {book.author}\nPublication Date: {book.pub_date}\n")
        else:
            print("Book not found!\n")

    elif choice == "4":
        library.display_books()

    elif choice == "5":
        break

    else:
        print("Invalid choice!\n")

这个图书管理系统包含两个类：`Book` 和 `Library`。

`Book` 类包含书的标题、作者和出版日期。`Library` 类包含了一个空的书籍列表，并包含添加、删除、搜索和显示图书信息的方法。

程序使用一个无限循环来接受用户输入的选项。当用户输入 `1` 时，程序会提示用户输入书籍信息并将其添加到库存中。当用户输入 `2` 时，程序会提示用户输入书籍标题并从库存中删除该书籍。当用户输入 `3` 时，程序会提示用户输入书籍标题并显示该书籍的信息。当用户输入 `4` 时，程序会显示库存中所有书籍的信息。当用户输入 `5` 时，程序会退出循环，结束程序的运行。