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 = nameself.author = authorself.price = priceself.publish = publishself.date = dateself.score = scoreself.comment = commentself.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 bookprint("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 == "":breakbook = 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