auto save

diy.py

 # 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
 # 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
-#file=open(r"C:\Users\liaoxiangyu\Desktop\book,txt","w",encoding="utf-8")
-# file.write("小兰:12本\n")
-# file.write("小丽:11本\n")
-# file.write("李文:9本\n")
-# file.write("张伟:16本\n")
-# file.close()
-# with open(r"C:\Users\liaoxiangyu\Desktop\book,txt","a",encoding="utf-8")as file:
-#     file.write("小鸟:44本\n")
-with open(r"C:\Users\liaoxiangyu\Desktop\book,txt","a",encoding="utf-8")as file:
-    for date in file:
-        if "小兰:12" in file:
-            print("在数据中")
+file=open(r"C:\Users\liaoxiangyu\Desktop\book,txt","w",encoding="utf-8")
+file.write("小兰:12本\n")
+file.write("小丽:11本\n")
+file.write("李文:9本\n")
+file.write("张伟:16本\n")
+file.close()
+with open(r"C:\Users\liaoxiangyu\Desktop\book,txt","a"",encoding="utf-8")as file:
+    file.write("小鸟:44本\n"),encoding="utf-8")as file:
+