auto save

diy.py

-with open(r"C:\Users\maku\Desktop\book.txt",'a',encoding="utf-8")as fee:
-    fee.write('小强：12本\n')    
-    fee.write('李明：15本\n')
\ No newline at end of file
+
+with open(r"C:\Users\maku\Desktop\book.txt",'r',encoding="utf-8")as fee:
+    for i in fee:
+        if '小兰：12本'in i:
+            print('小兰是个傻逼')
\ No newline at end of file