auto save

diy.py

@@ -9,11 +9,14 @@
 #file1.write("李明:15本\n")
 #file1.write("小兰:12本\n")
 #file1.close()
-with open(r"C:\\Users\\Administrator\\Desktop\\test.txt","r",encoding="utf-8") as file:
-    
+new_data=""
+with open(r"C:\\Users\\Administrator\\Desktop\\test.txt","r",encoding="utf-8") as file:    
     for data in file:
         if "小强:10本" in data:
-            print("在文件里面")
+            data=data.replace("小强:10本","小强:11本")
+        new_data+=data
+with open(r"C:\\Users\\Administrator\\Desktop\\test.txt","w",encoding="utf-8") as file:
+    file.write(new_data)