auto save

diy.py

 with open(r'c:\Users\EDZ\Documents\lesson13_2\sales_list.txt','r',encoding='utf-8')as file:
     a=file.readlines()
+
+
+final_sum=[]
 for i in a:
     data=i.split()
     sum=0
     for s in data[1:]:
         sum=sum+int(s)
-    print(sum)
\ No newline at end of file
+    result=data[0]+str(sum)
+    final_sum.append(result)
+with open(r'c:\Users\EDZ\Documents\lesson13_2\sales_list.txt','a',encoding='utf-8')as file:
+    file.writelines(final_sum)
\ No newline at end of file