save project

diy.py

 with open(r'C:\Users\Administrator\Desktop\sales_list.txt','r',encoding='utf-8') as file:
-    a=file.readlines()  
-bbb=[]
+    a=file.readlines()
+sum=0    
 for i in a:
     data=i.split()
-    sum=0
     for sales in data[1:]:
         sum=sum+int(sales)
-    aaa=data[0]+str(sum)+'\n'
-    bbb.append(aaa)
-with open(r'C:\Users\Administrator\Desktop\sales_list.txt','a',encoding='utf-8') as file:
-    file.writelines(bbb)
+    result=data[0]+str(sum)
+    print(result)