请帮我完善下列代码，完善内容希望有一些注释。

Question

报错内容Traceback (most recent call last):
File "C:/Users/heliun/PycharmProjects/pythonProject/14.py", line 117, in
supermarket.mainmenu()
File "C:/Users/heliun/PycharmProjects/pythonProject/14.py", line 86, in mainmenu
goods = Goods(id, name, price, num,allprice)
UnboundLocalError: local variable 'allprice' referenced before assignment
具体代码：class Goods:
def init(self,id,name,price,num):
self.id=id
self.name=name
self.price=price
self.num=num

class MySuperMarket:
def init(self,id,name):
self.id=id
self.name=name
self.allingoods=[]
self.alloutgoods=[]
self.allinvent={}

def ingoods(self, goods):
    dict = {}
    dict[goods.id] = goods
    self.allingoods.append(dict)
    if goods.id in self.allinvent.keys():
        object = self.allinvent[goods.id]
        object.price = (object.price * object.num + goods.price * goods.num) / (object.num + goods.num)
        object.num = object.num + goods.num
        self.allinvent[object.id] =object
        return 1
    inventgoods=Goods(goods.id,goods.name,goods.price,goods.num)
    self.allinvent[inventgoods.id] = inventgoods
def outgoods(self,goods):
    dict={}
    dict[goods.id]=goods
    self.alloutgoods.append(dict)
    if goods.id in self.allinvent.keys():

        if goods.num<=object.num:
            object.num=object.num-goods.num
            self.allinvent[object.id]=object
        else :
            print("库存数量不足！清重新输入")
            goods.num=int(input("请重新输入商品的数量："))
            object.num = object.num - goods.num
def allinventlook(self,goods):
    if goods.id in self.allinvent.keys():
        self.allinvent[object.id] = object
def outlook(self,goods):
    if goods.id in self.allinvent.keys():
        self.allinvent[object.id] = object

def inlook(self, goods):
    if goods.id in self.allinvent.keys():
        self.allinvent[object.id] = object

def mainmenu(self):
    while True:
        print("*"*8+self.name+"*"*8)
        print("1. 购进      2. 销售")
        print("3. 查询      0. 退出")
        print("*"*22)
        sele=int(input("请输入您的选择(0:退出）："))
        if sele==0:
            for k in self.allingoods:
                for v in k.values():
                    print(v.name,v.price,v.num)
            for v in self.allinvent.values():
                print(v.name,v.price,v.num,sep="  ")
            print("谢谢使用...")
            return 1
        elif sele==1:
            id=input("请输入购进的商品ID:")
            name=input("请输入购进的商品名称：")
            price=float(input("请输入商品单价："))
            num=float(input("请输入商品数量："))
            goods = Goods(id,name, price,num)
            self.ingoods(goods)
        elif sele==2:
            id=input("请输入销售商品的ID：")
            name=input("请输入销售商品的名称：")
            num= int(input("请输入销售商品的数量："))
            price= int(input("请输入销售商品的单价："))
            for a in self.alloutgoods:
                for b in i.values():
                    if b.id == id:
                        allprice = b.price * b.num

            goods = Goods(id, name, price, num,allprice)
            self.outgoods(goods)
        elif sele==3:
            print("*" * 8 + "查找类型"  +  "*" * 8)
            print("A. 查找库存商品      B.查找销售商品      Ｃ.查找进货商品")
            print("*" * 22)
            choose =input("请输入您的选择(#:退出）：")
            id = input("请输入需要查询的库存商品的ID：")
            if choose=="A":
                goods = Goods(id, name, price, num, allprice)
                for c in self.allinvent:
                    for d in d.values():
                        print("名称：d.name"+"单价：d.price"+"数量：d.num")
            elif choose == "Ｂ":
                goods = Goods(id, name, price, num, allprice)
                for e in self.allinvent:
                    for f in b.values():
                        print("名称：f.name" + "单价：f.price" + "数量：f.num"+"总价：f.allprice")
            elif choose == "Ｃ":
                goods = Goods(id, name, price, num)
                for c in self.allinvent:
                    for d in d.values():
                        print("名称：d.name" + "单价：d.price" + "数量：d.num")

#主模块
supermarket=MySuperMarket("001","道奇超市")
supermarket.mainmenu()

Answer 1

报错原因

首先说一下报错原因，出现 local variable 'xxx' referenced before assignment出现错误，一般会有两个原因：
情况一：变量没有被赋值直接引用了

def hello():
    print(a)   # 没有给a赋值，不知道a是什么

情况二：函数引用全局变量的时候没有声明
在函数内，既包含对全局变量的引用，又包含对其的赋值，且赋值放在了引用之后，就会报错。

money = 1000
def work(m):
   # 引用
    h = money + m
    print("h的值为：" + str(h))
    # 赋值
    money = h
    print("内部money的值：" + str(money))

work(200)

项目报错的原因是情况一。你在elseif语句中对变量进行赋值，只有选择了该分支，才会出现变量被赋值的情况；如果没有选择该赋值，则变量没有被赋值，这样直接引用自然会报错了。例如

# 当走分支 elif sele == 1 和 elif sele == 2时，id, name, num等变量都被赋值了，你使用下面的语句自然不会报错：
goods = Goods(id, name, price, num)  # 引用

# 当走分支 elif sele == 3时，没有对name, price, num, allprice等变量赋值， 这时候，如果直接走分支 if choose == "A" 就会立马报错了。

代码

# class，使用单数概念
class Good:
    # allprice 默认参数，只有出售商品列表需要用到该属性
    def __init__(self, id, name, price, num, allprice=0.0):
        self.id = id
        self.name = name
        self.price = price
        self.num = num
        self.allprice = allprice


class MySuperMarket:
    def __init__(self, id, name):
        self.id = id
        self.name = name
        self.allingoods = []  # list类型
        self.alloutgoods = []  # list 类型
        self.allinvent = {}  # dict类型

    # 进货
    def ingoods(self, good):
        # 添加商品到进货列表
        # 深拷贝，避免后续修改影响记录
        mgood = Good(good.id, good.name, good.price, good.num)
        self.allingoods.append(mgood)
        # 如果进货的商品有库存，修改库存信息
        if good.id in self.allinvent.keys():
            obj = self.allinvent[good.id]
            obj.price = (obj.price * obj.num + good.price * good.num) / (obj.num + good.num)
            obj.num = obj.num + good.num
            self.allinvent[obj.id] = obj
            return 1
        # 如果进货的商品无库存，直接添加到库存
        self.allinvent[good.id] = good

    # 销售
    def outgoods(self, good):
        # 出售商品，则添加商品到出售列表
        # 深拷贝，避免后续修改影响记录
        mgood = Good(good.id, good.name, good.price, good.num, good.allprice)
        self.alloutgoods.append(mgood)
        # 如果进货的商品有库存，且数量足够，则出售
        # 如果进货商品库存不足，则输出错误信息
        if good.id in self.allinvent.keys():
            obj = self.allinvent[good.id]
            if good.num <= obj.num:
                obj.num = obj.num - good.num
                self.allinvent[obj.id] = obj
            else:
                print("库存数量不足！清重新输入")
                good.num = int(input("请重新输入商品的数量："))
                obj.num = obj.num - good.num

    # 查找库存商品信息
    def allinventlook(self, goods):
        if goods.id in self.allinvent.keys():
            obj = self.allinvent[goods.id]
            print("名称：%s, 单价：%.2f, 数量：%d" % (obj.name, obj.price, obj.num))
            return
        print("查找的商品无库存")

    # 查找销售记录
    # 同一类商品可能存在多条销售记录，所以添加换行
    def outlook(self, good):
        # 增加一个变量，记录是否查找到记录
        isfound = False
        for obj in self.alloutgoods:
            if good.id == obj.id:
                print("名称：%s, 单价：%.2f, 数量：%d 总价：%.2f"
                      % (obj.name, obj.price, obj.num, obj.allprice))
                # 找到记录，赋值为True
                isfound = True

        # 没有找到记录，则输出提示信息
        if not isfound:
            print("查找的商品无出售记录")

    # 查找进货记录
    # 同一类商品可能存在多条进货记录，所以添加换行
    def inlook(self, good):
        # 增加一个变量，记录是否查找到记录
        isfound = False
        for obj in self.allingoods:
            if obj.id == good.id:
                print("名称：%s, 单价：%.2f, 数量：%d" % (obj.name, obj.price, obj.num))
                # 找到记录，赋值为True
                isfound = True
        if not isfound:
            print("查找的商品无进货记录")

    def mainmenu(self):
        global allprice
        while True:
            print("*" * 8 + self.name + "*" * 8)
            print("1. 购进      2. 销售")
            print("3. 查询      0. 退出")
            print("*" * 22)
            sele = int(input("请输入您的选择(0:退出）："))
            if sele == 0:
                for v in self.allingoods:
                    print(v.name, v.price, v.num)
                for v in self.allinvent.values():
                    print(v.name, v.price, v.num, sep="  ")
                print("谢谢使用...")
                return 1
            # 进货
            elif sele == 1:
                id = input("请输入购进的商品ID:")
                name = input("请输入购进的商品名称：")
                price = float(input("请输入商品单价："))
                num = int(input("请输入商品数量："))
                goods = Good(id, name, price, num)
                self.ingoods(goods)
            # 销售
            elif sele == 2:
                id = input("请输入销售商品的ID：")
                name = input("请输入销售商品的名称：")
                num = int(input("请输入销售商品的数量："))
                price = float(input("请输入销售商品的单价："))
                allprice = 0
                # 根据仓库的数据，计算总成本
                for e in self.allinvent:
                    if e.id == id:
                        allprice = e.price * e.num

                goods = Good(id, name, price, num, allprice)
                self.outgoods(goods)
            # 擦找
            elif sele == 3:
                print("*" * 8 + "查找类型" + "*" * 8)
                print("A. 查找库存商品      B.查找销售商品      C.查找进货商品")
                print("*" * 22)
                choose = input("请输入您的选择(#:退出）：")
                id = input("请输入需要查询的库存商品的ID：")
                if choose == "A":
                    goods = Good(id, "", 0, 0)
                    self.allinventlook(goods)
                elif choose == "B":
                    goods = Good(id, "", 0, 0, 0)
                    self.outlook(goods)
                elif choose == "C":
                    goods = Good(id, "", 0, 0)
                    self.inlook(goods)

# 按间距中的绿色按钮以运行脚本。
if __name__ == '__main__':
    supermarket = MySuperMarket("001", "道奇超市")
    supermarket.mainmenu()

# 访问 https://www.jetbrains.com/help/pycharm/ 获取 PyCharm 帮助

注释比较全了，如果有看不懂的，请提问。

有用，请点个采纳吧