auto save

diy.py

 with open(r"c:\Users\艾特机器人2号\Documents\lesson13-1\sales_list.txt","r",encoding = "utf-8")as f:
     a = f.readlines()
-
+n_s = []
 for i in a:
     data = i.split()
     sum = 0
-    for s in i[1:]:
+    for s in data[1:]:
         sum += int(s)
-    print(sum)
\ No newline at end of file
+    r = data[0] + "：" + str(sum)
+    print(r)
+    n_s.append(r)
+    
+with open(r"c:\Users\艾特机器人2号\Documents\lesson13-1\sales_list.txt","r",encoding = "utf-8")as f:
+    f.writelines()
\ No newline at end of file