auto save

diy.py

-with open("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","w",encoding="utf-8") as ww:
     a=ww.readlines()
     a=ww.readlines()
-
 for i in a:
 for i in a:
-    print(i)
+    print(i)
\ No newline at end of file