save project

diy.py

 with open(r'c:\Users\jason\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8')as file1:
     a = file1.readlines()
+final_sum = []
 for i in a:
     data = i.split()
     sum = 0
     for c in data[1:]:
         sum += int(c)
-    result=data[0]+':'+str(sum)
-    print(result)
-
+    result=data[0]+':'+str(sum)+'\n'
+    final_sum.append(result)
+    
+with open(r'c:\Users\jason\Documents\lesson13-1\newsales_list.txt','w',encoding='utf-8')as file2:
+    file2.writelines(final_sum)