save project

diy.py

 a=open(r'c:\Users\86131\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8')
 a=open(r'c:\Users\86131\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8')
-b=a.readlines()
-
+a.readlines()
+final_sum=[]
 for i in b:
 for i in b:
     data=i.split()
     data=i.split()
     #print(data[1:])
     #print(data[1:])
@@ -8,4 +8,7 @@ for i in b:
     for sales in data[1:]:
     for sales in data[1:]:
         sum=sum+int(sales)
         sum=sum+int(sales)
     w=data[0]+str(sum)
     w=data[0]+str(sum)
-    print(w)
+    final_sum.append(w)
\ No newline at end of file
+        
+with open(r'c:\Users\86131\Documents\lesson13-1\sales_list.txt) as a:
+    a.writelines(final_sum)