auto save

diy.py

 with open(r'c:\Users\Administrator.USER-20190821UB\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
     a=file.readlines()
     # print(a)
+new_r=[]
 for i in a:
     data=i.split()
     
@@ -8,4 +9,7 @@ for i in a:
     for sales in data[1:]:
         sum=sum+int(sales)
     r=data[0]+str(sum)
-    print(r)
\ No newline at end of file
+    new_r+=r
+    # print(r)
+
+with open(r'c:\Users\Administrator.USER-20190821UB\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
\ No newline at end of file