auto save

store.py

@@ -2,5 +2,8 @@ goods = {'å¯å£å¯ä¹':3,'旺仔牛奶':4,'农夫山泉':1,'è¾£æ¡':3,'巴西çƒ
 goods.pop("农夫山泉")
 print(goods)
 # 请将"农夫山泉"删掉，并打印出新的商品信息
-
+for i in goods:  #遍历字典的键
+for i in goods.keys():  #遍历字典的键
+for i in goods.values(): #遍历字典的值
+for k,v in goods.items(): #遍历字典的键值对