auto save

sales_list.txt

-open with(r'c:\Users\001\Documents\lesson13-1\sales_list.txt) as d:
+with open(r'c:\Users\001\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
 悟空 12 15 11 12 11 12 13 21 27 12 15 30 22 26 15 12 21 23 27 11
 诺依 21 29 15 21 21 21 29 30 12 13 12 12 24 52 27 26 15
 小贝 29 11 11 15 13 15 13 11 11 29 13 11