save project

diy.py

-with open(r'c:\Users\Think\Documents\lesson13-1\sales_list.txt')as mufan:
+with open(r'c:\Users\Think\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8')as mufan:
     a=mufan.readlines()
 for i in a:
     data=i.split()
@@ -6,4 +6,6 @@ for i in a:
     for sales in data[1:]:
         sum=sum+int(sales)
     result = data[0]+str(sum)
-    print(result)
\ No newline at end of file
+    final_sum.append(result)
+with open(r'c:\Users\Think\Documents\lesson13-1\sales_list.txt','a',encoding='utf-8')as mufan:
+