save project

diy.py

 with open(r"C:\Users\双师02\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as file:
 with open(r"C:\Users\双师02\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8") as file:
     a = file.readlines()
     a = file.readlines()
+    list = []
 for i in a:
 for i in a:
     data = i.split()
     data = i.split()
     sum = 0
     sum = 0
     for n in data[1:]:
     for n in data[1:]:
         sum = sum + int(n)
         sum = sum + int(n)
-    b = data[0] + str(sum)
-    print(b)
+    s = data[0] + str(sum) + "\n"
+    list.append(s)
\ No newline at end of file
+with open(r"C:\Users\双师02\Documents\lesson13-1\sum.txt","w",encoding="utf-8") as file:
+    file.writelines(list)
\ No newline at end of file