auto save

diy.py

 with open(r"c:\Users\丽达1号\Documents\lesson13-1\sales_list.txt",'r',encoding='utf-8') as file:
     a=file.readlines()
+final_sum=[]
 for i in a:
     data= i.split()
-    print(data[0])
-    print(data[1:]):
-
-    sum=sum+int(sales)
-    result=data[0]+str(sum)
-    print(result)
-
-
+    sum=0
+    for sales in data[1:]:
+        sum=sum+int(sales)
+    result=data[0]+str(sum)+'\n'
+    final_sum.append(result)
+with open(r"c:\Users\丽达1号\Documents\lesson13-1\sales_list00.txt",'a',encoding='utf-8') as file:
+    file.writelines(final_sum)