save project

diy.py

 with open(r'c:\Users\丽达1号\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
     a=file.readlines()
-final_sum[]
+final_sum=[]
 for i in a:
     data=i.split()
     #print(data[1:]) 
     sum=0
     for sales in data[1:]:
         sum += int(sales)
-    n=data[0]+str(sum)
+    n=data[0]+str(sum)+"/n"
     final_sum.append(n)
 
-with open(r'c:\Users\丽达1号\Documents\lesson13-1\sales_list9.txt','a',encoding='utf-8') as file:
-file.writelines(n)
\ No newline at end of file
+with open(r'c:\Users\丽达1号\Documents\lesson13-1\sales_list9.txt','w',encoding='utf-8') as file:
+    file.writelines(final_sum)
\ No newline at end of file