save project

diy.py

@@ -2,7 +2,7 @@ with open(r'c:\Users\XMBC\Documents\lesson13-1\sales_list.txt','r',encoding='utf
     a=file.readlines()
     #print(a)
 
-l=0
+l=[]
 for i in a:
     new_i=i.split()  
     #print(new_i[1:])
@@ -11,5 +11,5 @@ for i in a:
         sun=sun+int(sales)
     s=new_i[0]+str(sun)+'\n'
     l.append(s)
-with open(r'c:\Users\XMBC\Desktop\新建文本文档.txt','r',encoding='utf-8') as file:  
-    file.writelines(final_)
\ No newline at end of file
+with open(r'c:\Users\XMBC\Desktop\新建文本文档.txt','a',encoding='utf-8') as file:  
+    file.writelines(l)
\ No newline at end of file