save project

diy.py

 with open (r"c:\Users\丽达玛酷11号\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as file:
     a=file.readlines()
 #print(a)
+final_sum=[]
 for i in a:
     data=i.split( )
     #print(i[0])
@@ -8,5 +9,8 @@ for i in a:
     sum=0
     for sales in data[1:]:
         sum=sum+int(sales)
-    result=data[0]+str(sum)
-    print(result)
\ No newline at end of file
+    result=data[0]+str(sum)+'\n'
+    final_sum.append(result)
+
+with open (r"c:\Users\丽达玛酷11号\Documents\lesson13-1\new_salelist.txt","a",encoding="utf-8") as file:
+    file.writelines(final_sum)
\ No newline at end of file