python--book management system

Posted on by Admin

Realize book management

        Book Management System
        1. Query Books
        2. Add Books
        3. Borrow Books
        4. Return Books
        5. Exit the System

class Book(object):

    def __init__(self, name, author, status, bookindex):
        self.name = name
        self.author = author
        self.status = status
        self.bookindex = bookindex

    def __str__(self):
        if self.status == 1:
            stats = '未借出'
        elif self.status == 0:
            stats = '已借出'
        else:
            stats = '状态异常'
        return '书名: 《%s》 作者: %s 状态: <%s> 位置: %s' \
               % (self.name, self.author, stats, self.bookindex)


class BookManage(object):
    books = []

    def start(self):
        self.books.append(Book('python', 'guido', 1, 'ISO9001'))
        self.books.append(Book('c', '谭浩强', 1, 'NFS8102'))
        self.books.append(Book('java', 'westos', 1, 'PKA7844'))
        # 0:借出 1：存在
        # python 1
        # c 1
        # java 1

    def Menu(self):
        self.start()
        while True:
            print("""
                        图书管理系统
        1.查询图书
        2.增加图书
        3.借阅图书
        4.归还图书
        5.退出系统
        """)

            choice = input('请选择：')

            if choice == '1':
                self.showAllBook()
            elif choice == '2':
                self.addBook()
            elif choice == '3':
                self.borrowBook()
            elif choice == '4':
                self.returnBook()
            elif choice == '5':
                print('欢迎下次使用...')
                exit()
            else:
                print('请输入正确选择')
                continue

    def showAllBook(self):
        for book in self.books:
            print(book)

    def addBook(self):
        name = input('图书名称:')
        self.books.append(Book(name, input('作者:'), 1, input('存储位置:')))
        print('图书《%s》增加成功' % name)

    def checkBook(self, name):
        for book in self.books:
            if book.name == name:
                return book
        else:
            return None

    def borrowBook(self):
        name = input('借阅图书名称: ')
        ret = self.checkBook(name)
        print(ret)

        if ret != None:
            if ret.status == 0:
                print('书籍《%s》已经借出' % name)
            else:
                ret.status = 0
                print('书籍《%s》借阅成功' % name)
        else:
            print('书籍《%s》不存在' % name)

    def returnBook(self):
        name = input('归还图书名称:')
        ret = self.checkBook(name)

        if ret != None:
            if ret.status == 0:
                ret.status = 1
                print('书籍《%s》归还成功' % name)
                print(ret)
            else:
                print('书籍《%s》未借出' % name)
        else:
            print('书籍《%s》不存在' % name)


manager = BookManage()
manager.Menu()

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