save project

diy.py

@@ -5,8 +5,9 @@ for i in a:
     k=[]
     num=0
     for sales in date[1:]:
-        num=num+int(sales)
         n=date[0]+str(num)    
+        num=num+int(sales)
+    
     k.append(n)
 with open(r"C:\Users\Administrator\Documents\sales_list.txt.txt","a",encoding='utf-8') as file:
     file.writelines(k)