auto save

diy.py

+with open(r'D:\bf\sales_list.txt','r',encoding='utf-8') as a:
+    d=a.readlines()  
+final_sum=[]
+for i in d:
+    data=i.split()
+    sum=0
+    for sales in data[1:]:
+        sum=sum+int(sales)
+    result=data[0]+str(sum)+"\n"
+    final_sum.append(result)
+
+with open(r'D:\bf\sales_list.txt','a',encoding='utf-8') as a:
+    a.writelines(final_sum)
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