save project

diy.py

 with open(r"c:\Users\Administrator\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as file:    
 with open(r"c:\Users\Administrator\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 s in data[1:]:
     for s in data[1:]:
         sum=sum+int(s)
         sum=sum+int(s)
-    c=data[0]+str(sum)
-    print(c)
+    c=data[0]+str(sum)+"\n"
+    final_sum.append(c)
\ No newline at end of file
+    print(c)
+with open(r"c:\Users\Administrator\Documents\lesson13-1\sal_list.txt","r",encoding="utf-8") as file:
+    file.writelines(final_sum)
\ No newline at end of file