save project

diy.py

@@ -3,6 +3,7 @@ with open(r'c:\Users\Administrator\Documents\lesson13-1\sales_list.txt','r',enco
     # print(a)
     # print(a[3:5])
     # print(type(a[3:))
+final_sum=[]
 for i in a:
     date=i.split()
     sum=0
@@ -10,5 +11,8 @@ for i in a:
     # print(date[1:])
     for sales in date[1:]:
         sum=sum+int(sales)
-    result=date[0]+str(sum)
-    print(result)
+    result=date[0]+str(sum)+'/n'
+    final_sum.append(result)
+    #print(result)
+with open(r'c:\Users\Administrator\Documents\lesson13-3\sales_list.txt,'a',encoding='utf-8') as file:
+    file.writelines(final_sum)
\ No newline at end of file