auto save

diy.py

-with open(r"c:\Users\Administrator\Documents\lesson13-1\sales_list.txtc:\Users\Administrator\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as A:
-    B=A.readline()
+with open(r"c:\Users\Administrator\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as A:
+    B=A.readlines()
 for i in B:
 for i in B:
     print(i)
     print(i)
\ No newline at end of file