repository = dict()
shop_list = []
def init_repository(): # 初始化了很多的商品,每个元组代表一个商品 goods1 = ("1000001", "疯狂Ruby讲义", 88.0) goods2 = ("1000002", "疯狂Swift讲义", 69.0) goods3 = ("1000003", "疯狂Kotlin讲义", 59.0) goods4 = ("1000004", "疯狂Java讲义", 109.0) goods5 = ("1000005", "疯狂Android讲义", 108.0) goods6 = ("1000006", "疯狂iOS讲义", 77.0) # 把商品入库(放入dict中),条码作为key repository[goods1[0]] = goods1 repository[goods2[0]] = goods2 repository[goods3[0]] = goods3 repository[goods4[0]] = goods4 repository[goods5[0]] = goods5 repository[goods6[0]] = goods6
def show_goods(): print("欢迎光临 疯狂超市") print('疯狂超市的商品清单:') print("%13s%40s%10s" % ("条码", "商品名称", "单价")) # 遍历repository的所有value来显示商品清单 for goods in repository.values(): print("%15s%40s%12s" % goods)
def show_list(): print("=" * 100) # 如果清单不为空的时候,输出清单的内容 if not shop_list: print("还未购买商品") else: title = "%-5s|%15s|%40s|%10s|%4s|%10s" % ("ID", "条码", "商品名称", "单价", "数量", "小计") print(title) print("-" * 100) # 记录总计的价钱 sum = 0 # 遍历代表购物清单的list列表 for i, item in enumerate(shop_list): # 转换id为索引加1 id = i + 1 # 获取该购物项的第1个元素:商品条码 code = item[0] # 获取商品条码读取商品,再获取商品的名称 name = repository[code][1] # 获取商品条码读取商品,再获取商品的单价 price = repository[code][2] # 获取该购物项的第2个元素:商品数量 number = item[1] # 小计 amount = price * number # 计算总计 sum = sum + amount line = "%-5s|%17s|%40s|%12s|%6s|%12s" % (id, code, name, price, number, amount) print( line ) print("-" * 100) print(" 总计: " , sum) print("=" * 100)
def add(): # 等待输入条码 code = input("请输入商品的条码:\n") # 没有找到对应的商品,条码错误 if code not in repository: print("条码错误,请重新输入") return # 根据条码找商品 goods = repository[code] # 等待输入数量 number = input("请输入购买数量:\n") # 把商品和购买数量封装成list后加入购物清单 shop_list.append([code, int(number)])
def edit(): id = input("请输入要修改的购物明细项的ID:\n") # id减1得到购物明细项的索引 index = int(id) - 1 # 根据索引获取某个购物明细项 item = shop_list[index] # 提示输入新的购买数量 number = input("请输入新的购买数量:\n") # 修改item里面的number item[1] = int(number)
def delete(): id = input("请输入要删除的购物明细项的ID: ") index = int(id) - 1 # 直接根据索引从清单里面删除掉购物明细项 del shop_list[index] def payment(): # 先打印清单 show_list() print('\n' * 3) print("欢迎下次光临") # 退出程序 import os os._exit(0) cmd_dict = {'a': add, 'e': edit, 'd': delete, 'p': payment, 's': show_goods}
def show_command(): # 等待命令 cmd = input("请输入操作指令: \n" + " 添加(a) 修改(e) 删除(d) 结算(p) 超市商品(s)\n") # 如果用户输入的字符没有对应的命令 if cmd not in cmd_dict: print("不要玩,好不好!") else: cmd_dictcmd init_repository() show_goods()
while True: show_list() show_command()