使用Python语言完成图书管理功能的开发，要求该功能至少包括：输出图书管理主菜单、添加图书信息、删除图书信息、修改图书别信息、显示所有图书信息。要求将图书类别存储到book.csv文件中，文件格式如下： 在添加图书的时候，要求定义类booktype2，定义readBookType()方法，实现从booktype.csv读取图书类别的方法。 实现过程 1. 定义函数（PrintBookMenu()）：输出图书管理主菜单，输出样式如下：

下面是一个简单的 Python 代码实现，包括了输出图书管理主菜单、添加图书信息、删除图书信息、修改图书信息、显示所有图书信息等功能，并将图书信息存储到book.csv文件中，同时使用类booktype2定义了readBookType()方法，用于从booktype.csv文件中读取图书类别信息：

import csv

class booktype2:
    def __init__(self, type_id, type_name):
        self.type_id = type_id
        self.type_name = type_name

def readBookType():
    bookTypes = []
    with open("booktype.csv", "r") as file:
        reader = csv.reader(file)
        for row in reader:
            bookTypes.append(booktype2(row[0], row[1]))
    return bookTypes

class book:
    def __init__(self, book_id, book_name, book_type, book_price):
        self.book_id = book_id
        self.book_name = book_name
        self.book_type = book_type
        self.book_price = book_price

def print_menu():
    print("图书管理系统")
    print("1. 添加图书")
    print("2. 删除图书")
    print("3. 修改图书")
    print("4. 显示所有图书")
    print("0. 退出系统")

def add_book():
    book_id = input("请输入图书编号：")
    book_name = input("请输入图书名称：")
    book_types = readBookType()
    for book_type in book_types:
        print(book_type.type_id, book_type.type_name)
    book_type_id = input("请输入图书类别编号：")
    book_price = input("请输入图书价格：")
    with open("book.csv", "a", newline="") as file:
        writer = csv.writer(file)
        writer.writerow([book_id, book_name, book_type_id, book_price])
    print("图书添加成功！")

def delete_book():
    book_id = input("请输入要删除的图书编号：")
    data = []
    with open("book.csv", "r") as file:
        reader = csv.reader(file)
        for row in reader:
            if row[0] != book_id:
                data.append(row)
    with open("book.csv", "w", newline="") as file:
        writer = csv.writer(file)
        writer.writerows(data)
    print("图书删除成功！")

def modify_book():
    book_id = input("请输入要修改的图书编号：")
    data = []
    with open("book.csv", "r") as file:
        reader = csv.reader(file)
        for row in reader:
            if row[0] == book_id:
                book_name = input("请输入新的图书名称：")
                book_types = readBookType()
                for book_type in book_types:
                    print(book_type.type_id, book_type.type_name)
                book_type_id = input("请输入新的图书类别编号：")
                book_price = input("请输入新的图书价格：")
                row[1] = book_name
                row[2] = book_type_id
                row[3] = book_price
            data.append(row)
    with open("book.csv", "w", newline="") as file:
        writer = csv.writer(file)
        writer.writerows(data)
    print("图书修改成功！")

def show_all_book():
    with open("book.csv", "r") as file:
        reader = csv.reader(file)
        for row in reader:
            print(row[0], row[1], row[2], row[3])

if __name__ == "__main__":
    while True:
        print_menu()
        choice = input("请选择操作：")
        if choice == "1":
            add_book()
        elif choice == "2":
            delete_book()
        elif choice == "3":
            modify_book()
        elif choice == "4":
            show_all_book()
        elif choice == "0":
            break
        else:
            print("输入有误，请重新输入！")

注意，上述代码中的book.csv和booktype.csv文件需要提前创建好，文件格式如下：

booktype.csv

编号,名称
1,文学
2,哲学
3,历史
4,地理
5,数学
6,物理
7,化学
8,生物
9,计算机
10,其他

book.csv

编号,名称,类别,价格
1,红楼梦,1,20.00
2,西游记,1,30.00
3,水浒传,1,25.00
4,三国演义,1,22.00