auto save

diy.py

 with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','r',encoding="utf-8") as file:
     a = file.readlines()
+asdfg=[]
 for i in a:
     a = i.split()
     #print(a[1:])
     sum = 0
     for sales in a[1:]:
         sum += int(sales)
-    s=a[0] + str(sum)
-    print(s)
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+    s=a[0] + str(sum) + '\n'
+    asdfg.append(s)
+with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_listl.txt','a',encoding="utf-8") as file:
+    file.writelines(asdfg)
\ No newline at end of file