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Question

用Python设计一个信息管理系统 希望得到帮助 本人不会 谢谢大家

Answer 1

什么信息管理系统也没说呀，这里基于new bing给你实现一个商场管理系统，

import json

def menu():
    """显示主菜单"""
    print("="*30)
    print("1. 录入商品信息")
    print("2. 从文件中导入数据")
    print("3. 修改商品信息")
    print("4. 删除商品信息")
    print("5. 查询商品信息")
    print("6. 显示所有商品信息")
    print("7. 数据简单统计分析")
    print("0. 退出系统")
    print("="*30)

def add_goods_info(goods_list):
    """添加商品信息"""
    id_num = input("请输入商品编号：")
    name = input("请输入商品名称：")
    price = float(input("请输入商品价格："))
    quantity = int(input("请输入商品数量："))
    goods = {
        "id": id_num,
        "name": name,
        "price": price,
        "quantity": quantity
    }
    goods_list.append(goods)
    return goods_list

def import_goods_data(goods_list):
    """从文件中导入商品信息"""
    file_name = input("请输入文件名：")
    try:
        with open(file_name, 'r') as f:
            data = json.load(f)
            goods_list.extend(data)
    except FileNotFoundError:
        print("文件不存在！")
    return goods_list

def modify_goods_info(goods_list):
    """修改商品信息"""
    id_num = input("请输入要修改的商品编号：")
    for goods in goods_list:
        if goods['id'] == id_num:
            name = input("请输入商品名称：")
            price = float(input("请输入商品价格："))
            quantity = int(input("请输入商品数量："))
            goods['name'] = name
            goods['price'] = price
            goods['quantity'] = quantity
            print("修改成功！")
            break
    else:
        print("没有查到该商品信息！")
    return goods_list

def delete_goods_info(goods_list):
    """删除商品信息"""
    id_num = input("请输入要删除的商品编号：")
    for goods in goods_list:
        if goods['id'] == id_num:
            goods_list.remove(goods)
            print("删除成功！")
            break
    else:
        print("没有查到该商品信息！")
    return goods_list

def query_goods_info(goods_list):
    """查询商品信息"""
    id_num = input("请输入要查询的商品编号：")
    for goods in goods_list:
        if goods['id'] == id_num:
            print(f"编号：{goods['id']}，名称：{goods['name']}，价格：{goods['price']}，数量：{goods['quantity']}")
            break
    else:
        print("没有查到该商品信息！")

def show_all_goods_info(goods_list):
    """显示所有商品信息"""
    for goods in goods_list:
        print(f"编号：{goods['id']}，名称：{goods['name']}，价格：{goods['price']}，数量：{goods['quantity']}")

def simple_statistics(goods_list):
    """数据简单统计分析"""
    num_of_goods = len(goods_list)
    total_price = sum([goods['price']*goods['quantity'] for goods in goods_list])
    avg_price = total_price / num_of_goods if num_of_goods > 0 else 0
    max_price = max([goods['price'] for goods in goods_list]) if num_of_goods > 0 else 0
    min_price = min([goods['price'] for goods in goods_list]) if num_of_goods > 0 else 0
    print(f"商品总数：{num_of_goods}")
    print(f"商品总价值：{total_price:.2f}")
    print(f"商品平均价格：{avg_price:.2f}")
    print(f"最贵的商品价格：{max_price:.2f}")
    print(f"最便宜的商品价格：{min_price:.2f}")

def save_goods_data(goods_list):
    """将数据保存到文件中"""
    file_name = input("请输入文件名：")
    with open(file_name, 'w') as f:
        json.dump(goods_list, f)
    print("保存成功！")

def main():
    """主函数"""
    goods_list = []
    while True:
        menu()
        choice = input("请选择操作：")
        if choice == "1":
            goods_list = add_goods_info(goods_list)
        elif choice == "2":
            goods_list = import_goods_data(goods_list)
        elif choice == "3":
            goods_list = modify_goods_info(goods_list)
        elif choice == "4":
            goods_list = delete_goods_info(goods_list)
        elif choice == "5":
            query_goods_info(goods_list)
        elif choice == "6":
            show_all_goods_info(goods_list)
        elif choice == "7":
            simple_statistics(goods_list)
        elif choice == "0":
            break
        else:
            print("输入错误，请重新输入！")
    save_goods_data(goods_list)

if __name__ == '__main__':
    main()

test.txt文件初始化数据：

[
    {
        "id": "001",
        "name": "苹果",
        "price": 5.0,
        "quantity": 50
    },
    {
        "id": "002",
        "name": "香蕉",
        "price": 3.0,
        "quantity": 30
    },
    {
        "id": "003",
        "name": "橘子",
        "price": 4.0,
        "quantity": 40
    }
]