auto save

diy.py

@@ -4,5 +4,7 @@
 # file1.write('李文：9本\n')
 # file1.close()
 
-with open('C:\\Users\\22\\Desktop\\text.txt',"a",encoding='utf-8') as file1:
-    file1.write('张伟：16本\n')
+with open('C:\\Users\\22\\Desktop\\text.txt',"r",encoding='utf-8') as file1:
+    for data in file1:
+        if '李文：9本' in data:
+            print("在文件中")