save project

diy.py

 with open(r"c:\Users\Asus\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as file_1:
     a  = file_1.readlines()
+
 final_list = []
+
 for i in a:
     date = i.split()
     #print(date[0])
@@ -8,7 +10,7 @@ for i in a:
     sum1 = 0
     for sales in date[1:]:
         sum1 = sum1 + int(sales)
-    result = date[0] + str(sum1)
+    result = date[0] + str(sum1)+'\n'
     final_list.append(result)
 
 with open(r"c:\Users\Asus\Documents\lesson13-1\sales_list.txt","a",encoding="utf-8") as file_1: