save project

diy2.py

 with open(r"C:\Users\Administrator\Desktop\book.txt",'r',encoding='utf-8') as file:
 with open(r"C:\Users\Administrator\Desktop\book.txt",'r',encoding='utf-8') as file:
     for data in file:
     for data in file:
         if '小兰：12本' in data:
         if '小兰：12本' in data:
-            print('小兰数据在文件中')
+            print('小兰数据在文件中')
\ No newline at end of file
+with open(r"C:\Users\Administrator\Desktop\book.txt",'w',encoding='utf-8') as file:
+    file.write(new_data)   
+with open(r"C:\Users\Administrator\Desktop\book.txt",'r',encoding='utf-8') as file:
+    a = file.read()
+    print(a)
\ No newline at end of file