save project

diy.py

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