Python 基础 （十）Python实现简单的图书管理系统

Python基础文章系列

4.10 简单练习图书管理系统

简单的图书管理系统的实现，主要功能如下：

1. 定义了一个 Library 类，用于管理图书馆中的书籍。
2. 提供了添加书籍、删除书籍、查找书籍、修改书籍、显示所有书籍、保存书籍、加载书籍和排序书籍等功能。
3. 通过文件操作，可以将书籍信息保存到名为 “book.txt” 的文本文件中，以及从该文件加载书籍信息。
4. 提供了一个命令行菜单，允许用户选择不同的操作，如添加、删除、查找、修改、显示、保存、加载和排序书籍。
5. 使用了 Book 类来表示书籍的信息，包括书名、作者、价格、出版社、出版日期、评分、评论数和链接。

   用户可以通过输入相应的操作序号来执行不同的操作，从而管理图书馆中的书籍。

• 图书类

# ---encoding:utf-8---# @Time    : 2023/9/3 19:30# @Author  : Darwin_Bossen# @Email   ：3139066125@qq.com# @Site    :  书籍类# @File    : Book.pyclass Book:    # 书籍类    def __init__(self, name, author, price, publish, date, score, comment, url):        self.name = name        self.author = author        self.price = price        self.publish = publish        self.date = date        self.score = score        self.comment = comment        self.url = url    # 重写str方法    def __str__(self):        return "书名：" + self.name + "\n作者：" + self.author + "\n价格：" + self.price + "\n出版社：" + self.publish + "\n出版日期：" + self.date + "\n评分：" + self.score + "\n评论数：" + self.comment + "\n链接：" + self.url

• Library类

# ---encoding:utf-8---# @Time    : 2023/9/3 19:32# @Author  : Darwin_Bossen# @Email   ：3139066125@qq.com# @Site    : 图书类# @File    : Library.pyfrom Book import Book# 图书馆类class Library:    def __init__(self):        self.book_list = []    def __str__(self):        return str(len(self.book_list)) + "本书"    # 显示所有书籍    def showBook(self):        for book in self.book_list:            print(book)            print("--------------------------------------------------")    # 添加书籍    def addBook(self, book):        self.book_list.append(book)    # 删除书籍    def delBook(self, book):        if book in self.book_list:            self.book_list.remove(book)            print("删除成功")        else:            print("删除失败")    # 查找书籍    def findBook(self, name):        for book in self.book_list:            if book.name == name:                print(book)                return book        print("查无此书")        return None    # 修改书籍    def modifyBook(self, book):        if book in self.book_list:            self.book_list.remove(book)            self.book_list.append(book)            print("修改成功")        else:            print("修改失败")    # 保存书籍    def saveBook(self):        with open("book.txt", "w", encoding="utf-8") as f:            for book in self.book_list:                f.write(book.name + "," + book.author + "," + book.price + "," + book.publish + "," + book.date + "," + book.score + "," + book.comment + "," + book.url + "\n")        print("保存成功")    # 加载书籍    def loadBook(self):        with open("book.txt", "r", encoding="utf-8") as f:            while True:                line = f.readline()                if line == "":                    break                book = line.split(",")                self.book_list.append(book)        print("加载成功")    # 排序    def sortBook(self):        self.book_list.sort(key=lambda book:book.score, reverse=True)        print("排序成功")if __name__ == '__main__':        library = Library()        while True:            print("1.添加书籍")            print("2.删除书籍")            print("3.查找书籍")            print("4.修改书籍")            print("5.显示所有书籍")            print("6.保存书籍")            print("7.加载书籍")            print("8.排序")            print("0.退出")            num = input("请输入操作序号：")            if num == "1":                name = input("请输入书名：")                author = input("请输入作者：")                price = input("请输入价格：")                publish = input("请输入出版社：")                date = input("请输入出版日期：")                score = input("请输入评分：")                comment = input("请输入评论数：")                url = input("请输入链接：")                book = Book(name, author, price, publish, date, score, comment, url)                library.addBook(book)            elif num == "2":                name = input("请输入书名：")                book = library.findBook(name)                library.delBook(book)            elif num == "3":                name = input("请输入书名：")                library.findBook(name)            elif num == "4":                name = input("请输入书名：")                book = library.findBook(name)                if book != None:                    author = input("请输入作者：")                    price = input("请输入价格：")                    publish = input("请输入出版社：")                    date = input("请输入出版日期：")                    score = input("请输入评分：")                    comment = input("请输入评论数：")                    url = input("请输入链接：")                    book = Book(name, author, price, publish, date, score, comment, url)                    library.modifyBook(book)            elif num == "5":                library.showBook()            elif num == "6":                library.saveBook()            elif num == "7":                library.loadBook()            elif num == "8":                library.sortBook()            elif num == "0":                break

• 效果

到此我们Python的基础知识就完了，下面Python的进阶知识，线程