auto save

diy.py

 with open("sales_list.txt",'r',encoding='utf-8') as file:
     a=file.readlines()
+final_sum=[]
 for i in a:
     i=i.split( )
     sum=0
     for sales in i[1:]:
         sum=sum+int(sales)
     result=i[0]+str(sum)+'\n'
-    print(result)
+    final_sumappend(result)
 
-with open()
\ No newline at end of file
+with open("new_salelist.txt",'a',encoding='utf-8') as file:
+    file.writelines(final_sum)
\ No newline at end of file