auto save

diy.py

-with open(r'C:\Users\Administrator\Desktop\sales_list.txt ','r',encoding='utf-8') as file:
+with open(r'C:\Users\Administrator\Documents\lesson13-3\sales_list.txt','r',encoding='utf-8') as file:
     a=file.readlines()
     a=file.readlines()
 
 
 for i in a:
 for i in a: