auto save

diy.py

-with open(r"c:\Users\Administrator\Documents\lesson13_2\sales_list.txt","w",encoding="utf-8") as ww:
+with open (r'c:\Users\Administrator\Documents\lesson13_2\sales_list.txt', 'r', encoding='utf-8') as ww:
     a=ww.readlines()
+
 for i in a:
-    print(i)
+    print(i)
\ No newline at end of file