auto save

diy.py

@@ -4,6 +4,6 @@ a.write("小兰：12本")
 a.close()
 a.close()
 
 
 with open(r"D:\book.txt","a",encoding="utf-8") as a:
 with open(r"D:\book.txt","a",encoding="utf-8") as a:
-     a.write("小丽：11本")
-     a.write("李文：9本")
-     a.write("张伟：16本")
+     a.write("小丽：11本/n")
+     a.write("李文：9本/n")
+     a.write("张伟：16本/n")
\ No newline at end of file