1 def format_insert_words_and_add_good_info(insert_words, separator_symbol):
 2     insert_words_formatted_list = insert_words.split(separator_symbol)
 3     # 此处省略类似下面select_goods()函数里的格式化输入的步骤,自动删除所有不合法的输入
 4     # 以下代码默认good_insert的内容为合法内容,且省略了商品名已存在时修改录入的商品名为'商品1'的步骤
 5     good_temp_dic = {"name": insert_words_formatted_list[0], "price": int(insert_words_formatted_list[1]),
 6                      "allowance": int(insert_words_formatted_list[2])}
 7     goods.append(good_temp_dic)
 8     return goods
 9
10
11 def show_insert():
12     try:
13         good_insert = input("请输入准备添加到货架的商品的'名字','单价','数量',用英文逗号/英文句号或空格隔开: ").strip()
14         if ',' in good_insert:
15             format_insert_words_and_add_good_info(good_insert, ',')
16         elif '.' in good_insert:
17             format_insert_words_and_add_good_info(good_insert, '.')
18         elif ' ' in good_insert:
19             format_insert_words_and_add_good_info(good_insert, ' ')
20         else:
21             print('分隔符输入不合法,未能录入数据')
22             show_insert()
23     except KeyboardInterrupt:
24         print('\n手动终止录入进程,再见...')
25
26 def write_goods_info():
27     show_insert()
28     with open('goods_info.json','w') as info_file:
29     # 这里如果用遍历goods的方法,只添加商品的字典,那么在上面'格式化插入的文字以及添加商品信息'方法里直接追加good_temp_dic
30     # with open('goods_info.json','a') as info_file:
31         info_file.write(goods)
32     

  1 goods = [{"name": "电脑", "price": 1999, "allowance": 100},
  2          {"name": "鼠标", "price": 10, "allowance": 100},
  3          {"name": "游艇", "price": 20, "allowance": 100},
  4          {"name": "美女", "price": 998, "allowance": 100},
  5          {"name": "帅哥", "price": 98, "allowance": 100}, ]
  6 price_list = []  # 方便后面比较钱包余额是否大于最小单价
  7 for good_index_temp in range(0, len(goods)): price_list.append(goods[good_index_temp]['price'])
  8
  9
 10 def show_goods():
 11     print('**********商品列表**********')
 12     print('编号\t\t商品\t\t价格\t\t库存')
 13     for good_index in range(0, len(goods)):
 14         good_index += 1
 15         print('{0}\t\t{1}\t\t{2}\t\t{3}'.format(good_index, goods[good_index - 1]['name'],
 16                                                 goods[good_index - 1]['price'],
 17                                                 goods[good_index - 1]['allowance']))
 18
 19
 20 def show_wallet():
 21     wallet = input('偷偷show一下钱包金额:').strip()
 22     if wallet.isdigit():
 23         wallet = int(wallet)
 24         if wallet < min(price_list):
 25             print('穷逼滚,再给你一次机会')
 26             show_wallet()
 27         else:
 28             print('总资产%d元,开始购物吧高富帅' % wallet)
 29             return wallet
 30     else:
 31         print('糊弄谁呢?再给你一次机会')
 32         show_wallet()
 33
 34
 35 def select_goods(wallet, shopping_count=0):  # return customer_choice_list, return selected_goods
 36     customer_choice = input("请选择商品编号及数量(以':'区分),使用空格隔开: ")
 37     # ' 4:3:4   3:2   5:1    a:1   %:#   #  @   1:120    2:m   ''
 38     customer_choice_list = customer_choice.split(' ')
 39     print(customer_choice_list)
 40     temp_list = customer_choice_list.copy()  # 浅拷贝,以便后面遍历时删除无效项或非法项
 41     for element in temp_list:
 42         if element == '' or element == ' ':  # 去空(无效项)
 43             # print('过多的空格已被自动删除')
 44             customer_choice_list.remove(element)
 45         elif ':' not in element:  # 去掉无":"匹配的项(无效项)
 46             # print('无效的匹配项已被自动删除')
 47             customer_choice_list.remove(element)
 48         elif len(element.split(':')) != 2:  # 去掉":"匹配后长度不为2(不是正常匹配)的项目(非法项)
 49             # print('非法项已被自动删除')
 50             customer_choice_list.remove(element)
 51         elif element.split(':')[0].isdigit() == 0 or element.split(':')[-1].isdigit() == 0:  # 去掉首尾非数字的项(非法项)
 52             #  print('非商品编号或非正常商品数量,已自动删除')
 53             customer_choice_list.remove(element)
 54         elif int(element.split(':')[0]) not in range(1, len(goods) + 1):  # print('选择的商品编号不存在,已自动删除.')
 55             customer_choice_list.remove(element)
 56         elif int(element.split(':')[-1]) > goods[int(element.split(':')[0]) - 1]['allowance']:
 57             customer_choice_list.remove(element)
 58             element = element.split(':')[0] + ':' + str(goods[int(element.split(':')[0]) - 1]['allowance'])
 59             print(">>>%s<<<选择了过多的数量,已自动修改为最大库存量>>%d<<" % (
 60                 goods[int(element.split(':')[0]) - 1]['name'], goods[int(element.split(':')[0]) - 1]['allowance']))
 61             customer_choice_list.append(element)
 62     del temp_list  # 释放临时列表内存
 63     print('您选择了如下商品:⤵⤵⤵⤵')  # 只是展示给用户知道他买了什么
 64     selected_goods = []  # 只是展示给用户知道他买了什么
 65     for selection in customer_choice_list:
 66         shopping_cart = {'商品名': goods[int(selection.split(':')[0]) - 1]['name'],
 67                          '单价': goods[int(selection.split(':')[0]) - 1]['price'],
 68                          '购买数量': int(selection.split(':')[-1])}
 69         shopping_cart['所需金额'] = shopping_cart['单价'] * shopping_cart['购买数量']
 70         selected_goods.append(shopping_cart)
 71     for selected_good in selected_goods:
 72         print(selected_good)  # 只是展示给用户,并没有他意
 73     sum_price = 0
 74     temp_list = goods.copy()  # 浅拷贝商品列表,以便在删除某商品时仍可计算客户所花总价
 75     for customer_choice_list_element in customer_choice_list:
 76         goods[int(customer_choice_list_element.split(':')[0]) - 1]['allowance'] -= int(
 77             customer_choice_list_element.split(':')[-1])
 78         if goods[int(customer_choice_list_element.split(':')[0]) - 1]['allowance'] == 0:
 79             goods.pop(int(customer_choice_list_element.split(':')[0]) - 1)
 80         sum_price += temp_list[int(customer_choice_list_element.split(':')[0]) - 1]['price'] * int(
 81             customer_choice_list_element.split(':')[-1])
 82     wallet_allowance = wallet - sum_price
 83     del temp_list  # 释放临时内存
 84     if wallet_allowance < 0:
 85         print('余额不足,还需补充%d元.请下次多带点钱来,穷逼!' % abs(wallet_allowance))
 86     elif wallet_allowance < min(price_list):
 87         print('此次购物花费%d元,余额%d元' % (sum_price, wallet_allowance))
 88         print('余额暂不够买任何商品了,下次请多带点钱来吧!')
 89     else:
 90         print('此次购物花费%d元,余额%d元' % (sum_price, wallet_allowance))
 91         while 'Query_Go_On_Shopping?':
 92             try:
 93                 customer_selection = input('是否需要继续购买?Y/N').strip().lower()
 94                 if customer_selection == 'n':
 95                     shopping_count += 1
 96                     print('谢谢%d次惠顾,欢迎下次光临...' % shopping_count)
 97                     break
 98                 elif customer_selection == 'y':
 99                     show_goods()  # 展示商品余量
100                     shopping_count += 1
101                     select_goods(wallet_allowance, shopping_count)
102                     break
103                 else:
104                     print('选择无效,请重新选择')
105             except KeyboardInterrupt:
106                 print('手动打断购物进程,再见')
107
108
109 if __name__ == '__main__':
110     show_goods()
111     select_goods(show_wallet())