auto save

diy.py

 with open(r'C:\Users\yd\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as f1:
-    date = f1.readlines()
+    date = f1.readlines()        #把每行作为一个元素放到一个大列表中
+    new_date = []
     for i in date:
-        print(i,end='')
\ No newline at end of file
+        j = i.split()     #用空格将字符串进行分割，a形成一个列表，分割后的元素数据类型为字符串
+        sum = 0
+        for k in j[1:]:
+            sum = sum+int(k)       
+        with open(r'C:\Users\yd\Desktop\捐赠信息.txt','a',encoding='utf-8') as f2:
+            f2.write(j[0]+str(sum)+'\n')   #参数为一个列表，写入列表信息
+        
+