save project

diy.py

 with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8')as ss:
     a=ss.readlines()
+    sam=[]
     for i in a:
         aaa=i.split()
         sum=0
@@ -8,3 +9,6 @@ with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','r',enco
             sum=sum+int(sales)
         rl=aaa[0]+str(sum)
         print(rl)
+    sam.append(rl)
+with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','w',encoding='utf-8')as sl:
+    sl.writelines(sam\n)
\ No newline at end of file