save project

diy.py

 with open(r"C:\Uses\CM\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as file:
 with open(r"C:\Uses\CM\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as file:
     a=file.readlines()
     a=file.readlines()
+final_sum=[]
 for i in a:
 for i in a:
     data=i.split()
     data=i.split()
     sum=0
     sum=0
     for sales in data[1:]:
     for sales in data[1:]:
         sum=sum+int(sales)
         sum=sum+int(sales)
-    result=data[0]+str(sum)
-    print(result)
+    result=data[0]+str(sum)+"\n"
+with open(r"C:\Uses\CM\Documents\lesson13-1\sales_list.txt","a",encoding="utf-8") as file:
\ No newline at end of file
+    file.writelines(final_sum)
\ No newline at end of file