auto save

diy.py

@@ -7,4 +7,6 @@
 with open (r'/Users/hltwhy/Desktop/book.txt','r',encoding='utf-8')as file1:
     a=file1.read()
     print(a)
-    
\ No newline at end of file
+for data in file1:
+    if "小四：12本" in data
+        print("在文件中")   
\ No newline at end of file