save project

diy.py

 with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
     a=file.readlines()
     #print(i)
+final_sum=[]
 for i in a:
     #print(i)
     data=i.split()
@@ -8,5 +9,11 @@ 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'
+    #print(result)
+    final_sum.append(result)
+
+with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','a',encoding='utf-8') as file:
+    file.writelines(final_sum)
+
+           
\ No newline at end of file