auto save

diy.py

 with open("c:\\Users\\86139\\Documents\\lesson13-1\\sales_list.txt",'r',encoding='utf-8') as file:
     a=file.readlines()
-#   print(a)
 oversum=[]
 for i in a:
     data=i.split()
-    #print(ii[1:])
     sum=0
     for sale in data[1:]:
         sum=sum+int(sale)
-    new=data[0]+str(sum)+"\n"
-    oversum.append(new)
+    new=data[0]+str(sum)+'\n'
+    oversum.append()
 with open("c:\\Users\\86139\\Documents\\lesson13-1\\sales_list.txt",'a',encoding='utf-8') as file:
-    file.writelines(oversum)
+    file.writelines(new)
+