auto save

diy.py

-open(r"c:\Users\xiexiaohua\Documents\lesson13-1\sales_list.txt,"r",encoding="utf-8")
-    a=file.read()
+open(r"c:\Users\xiexiaohua\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as file
+    a=file.readlines()
 #print(a)
     for i in a:
-        print(i)
\ No newline at end of file
+        b=i.split()
+        sum =0
+        for sales in b[1:]:
+            sum=sum+int(sales)
+        result=b[0]+str(sum)
+        print(result)
\ No newline at end of file