save project

diy.py

 with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8')as niuniu:
     a=niuniu.readlines()
+final_sum=[]
 for i in a:
    # print(i)
     data=i.split()
     sum=0
     for sales in data[1:]:
         sum=sum+int(sales)
-    result=data[0]+str(sum)
-    print(result)
+    result=data[0]+str(sum)+'\n'
+    final_sum.append(result)
+with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','a',encoding='utf-8')as niuniu:
+    niuniu.writelines(final_num)    
         
         
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