save project

diy.py

@@ -20,8 +20,10 @@ with open(r'C:\Users\16420\Desktop\book.txt','r',encoding='utf-8') as file1:
             data=data.rplace('小强: 10本','小强: 11本')
         if '小兰10本' in data:
             data=data.rplace('小兰: 12本','小兰: 14本')
-    
+        new_data +=data
 
+with open(r'C:\Users\16420\Desktop\book.txt','r',encoding='utf-8') as file1:
+    file1.write(new_data)