auto save

diy.py

+# 写入同学们的捐赠明细：
+#file1=open(r'C:\Users\Administrator\Desktop\1.txt','w',encoding='utf-8')
+#file1.write('小兰:12本\n')
+#file1.write('李文:9本\n')
+#file1.write('张伟:16本\n')
+#file1.write('小丽:11本\n')
+#file1.close()
+with open(r'C:\Users\Administrator\Desktop\1.txt','r',encoding='utf-8')as file1:
+#   file1.write('蟑螂:12本\n')
+#   file1.write('李华:15本\n')