python编写超市收银系统

好的，以下是使用Python编写超市收银系统的示例代码，仅供参考：

# 导入所需的库
import time

# 商品管理模块
class Goods:
    def __init__(self, name, price, stock):
        self.name = name
        self.price = price
        self.stock = stock

class GoodsManager:
    def __init__(self):
        self.goods_list = []

    # 添加商品
    def add_goods(self, goods):
        self.goods_list.append(goods)

    # 删除商品
    def del_goods(self, name):
        for goods in self.goods_list:
            if goods.name == name:
                self.goods_list.remove(goods)

    # 修改商品价格
    def modify_price(self, name, price):
        for goods in self.goods_list:
            if goods.name == name:
                goods.price = price

    # 修改商品库存
    def modify_stock(self, name, stock):
        for goods in self.goods_list:
            if goods.name == name:
                goods.stock = stock

    # 查询商品信息
    def search_goods(self, name):
        for goods in self.goods_list:
            if goods.name == name:
                return goods
        return None

    # 显示商品列表
    def show_goods_list(self):
        print("商品列表：")
        for goods in self.goods_list:
            print("名称：{}，价格：{}，库存：{}".format(goods.name, goods.price, goods.stock))

# 销售模块
class Sale:
    def __init__(self, goods, num):
        self.goods = goods
        self.num = num

class SaleManager:
    def __init__(self):
        self.sale_list = []

    # 添加销售记录
    def add_sale(self, sale):
        self.sale_list.append(sale)

    # 计算总价格
    def calc_total_price(self):
        total_price = 0
        for sale in self.sale_list:
            total_price += sale.goods.price * sale.num
        return total_price

    # 打印小票
    def print_receipt(self):
        print("**********小票**********")
        for sale in self.sale_list:
            print("商品：{}，单价：{}，数量：{}，总价：{}".format(sale.goods.name, sale.goods.price, sale.num, sale.goods.price * sale.num))
        print("总价：{}".format(self.calc_total_price()))
        print("************************")

# 会员管理模块
class Member:
    def __init__(self, name, discount):
        self.name = name
        self.discount = discount

class MemberManager:
    def __init__(self):
        self.member_list = []

    # 添加会员
    def add_member(self, member):
        self.member_list.append(member)

    # 删除会员
    def del_member(self, name):
        for member in self.member_list:
            if member.name == name:
                self.member_list.remove(member)

    # 修改会员折扣
    def modify_discount(self, name, discount):
        for member in self.member_list:
            if member.name == name:
                member.discount = discount

    # 查询会员信息
    def search_member(self, name):
        for member in self.member_list:
            if member.name == name:
                return member
        return None

# 库存管理模块
class Stock:
    def __init__(self, goods, num):
        self.goods = goods
        self.num = num

class StockManager:
    def __init__(self):
        self.stock_list = []

    # 添加库存
    def add_stock(self, stock):
        self.stock_list.append(stock)

    # 删除库存
    def del_stock(self, name):
        for stock in self.stock_list:
            if stock.goods.name == name:
                self.stock_list.remove(stock)

    # 修改库存数量
    def modify_num(self, name, num):
        for stock in self.stock_list:
            if stock.goods.name == name:
                stock.num = num

    # 查询库存信息
    def search_stock(self, name):
        for stock in self.stock_list:
            if stock.goods.name == name:
                return stock
        return None

    # 显示库存列表
    def show_stock_list(self):
        print("库存列表：")
        for stock in self.stock_list:
            print("商品：{}，数量：{}".format(stock.goods.name, stock.num))

# 报表统计模块
class Report:
    def __init__(self, goods, num):
        self.goods = goods
        self.num = num

class ReportManager:
    def __init__(self):
        self.report_list = []

    # 添加报表记录
    def add_report(self, report):
        self.report_list.append(report)

    # 统计销售情况
    def calc_sale_report(self):
        sale_dict = {}
        for report in self.report_list:
            if report.goods.name in sale_dict:
                sale_dict[report.goods.name] += report.num
            else:
                sale_dict[report.goods.name] = report.num
        return sale_dict

    # 统计库存情况
    def calc_stock_report(self):
        stock_dict = {}
        for report in self.report_list:
            if report.goods.name in stock_dict:
                stock_dict[report.goods.name] += report.num
            else:
                stock_dict[report.goods.name] = report.num
        return stock_dict

# 主程序
if __name__ == "__main__":
    # 初始化商品列表
    goods1 = Goods("可口可乐", 3.0, 50)
    goods2 = Goods("雪碧", 2.5, 60)
    goods3 = Goods("芬达", 2.8, 40)
    goods_manager = GoodsManager()
    goods_manager.add_goods(goods1)
    goods_manager.add_goods(goods2)
    goods_manager.add_goods(goods3)

    # 初始化会员列表
    member1 = Member("张三", 0.8)
    member2 = Member("李四", 0.9)
    member_manager = MemberManager()
    member_manager.add_member(member1)
    member_manager.add_member(member2)

    # 初始化库存列表
    stock1 = Stock(goods1, 50)
    stock2 = Stock(goods2, 60)
    stock3 = Stock(goods3, 40)
    stock_manager = StockManager()
    stock_manager.add_stock(stock1)
    stock_manager.add_stock(stock2)
    stock_manager.add_stock(stock3)

    # 初始化报表列表
    report_manager = ReportManager()

    # 进入销售流程
    while True:
        print("请输入商品名称：")
        goods_name = input()
        goods = goods_manager.search_goods(goods_name)
        if goods is None:
            print("商品不存在，请重新输入！")
            continue
        print("请输入数量：")
        num = int(input())
        if num > goods.stock:
            print("库存不足，请重新输入！")
            continue
        sale = Sale(goods, num)
        sale_manager = SaleManager()
        sale_manager.add_sale(sale)

        # 更新库存数量
        goods.stock -= num
        stock_manager.modify_num(goods_name, goods.stock)

        # 更新报表记录
        report = Report(goods, num)
        report_manager.add_report(report)

        # 是否需要结算
        print("是否需要结算（Y/N）？")
        choice = input()
        if choice == "Y" or choice == "y":
            # 是否使用会员卡
            print("是否使用会员卡（Y/N）？")
            choice = input()
            if choice == "Y" or choice == "y":
                print("请输入会员名称：")
                member_name = input()
                member = member_manager.search_member(member_name)
                if member is None:
                    print("会员不存在，不使用会员卡！")
                    discount = 1.0
                else:
                    discount = member.discount
            else:
                discount = 1.0

            # 计算总价
            total_price = sale_manager.calc_total_price() * discount
            print("总价为：{}".format(total_price))

            # 打印小票
            sale_manager.print_receipt()

            # 更新报表记录
            for sale in sale_manager.sale_list:
                report = Report(sale.goods, sale.num)
                report_manager.add_report(report)

            # 退出销售流程
            break

    # 显示报表统计
    sale_report = report_manager.calc_sale_report()
    print("销售情况：")
    for goods_name, num in sale_report.items():
        print("商品：{}，数量：{}".format(goods_name, num))

    stock_report = report_manager.calc_stock_report()
    print("库存情况：")
    for goods_name, num in stock_report.items():
        print("商品：{}，数量：{}".format(goods_name, num))

以上代码并不完整，仅仅是一个简单的示例，实际应用中还需要根据具体需求进行完善。