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])
     #print(date[1：])
     sum1 = 0
-    final_list
     for sales in date[1:]:
         sum1 = sum1 + int(sales)
     result = date[0] + str(sum1)
-    print(result)    
\ No newline at end of file
+    final_list.append(result)
+
+with open(r"c:\Users\Asus\Documents\lesson13-1\sales_list.txt","a",encoding="utf-8") as file_1:
+   file_1.writelines(final_list)
\ No newline at end of file