auto save

diy.py

@@ -9,4 +9,5 @@ file1.write("李文：9本\n")
 file1.write("张伟：16本\n")
 file1.close()
 
-with open(r"C:\Users\Acer\Desktop\test.txt","a",encoding="utf-8") as file:
\ No newline at end of file
+with open(r"C:\Users\Acer\Desktop\test.txt","a",encoding="utf-8") as file:
+    
\ No newline at end of file