auto save

diy.py

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