save project

diy.py

@@ -5,3 +5,9 @@ with open(r'C:\Users\CM\Desktop\book.txt','w',encoding='utf-8')as filel:
             print('小强数据在文件中')
         if '小兰:25本' in data:
             print('小兰数据在文件中')
+with open(r'C:\Users\CM\Desktop\book.txt','w',encoding='utf-8')as filel:
+    filel.write(new_data)
+
+with open(r'C:\Users\CM\Desktop\book.txt','w',encoding='utf-8')as filel:
+    a=filel.read()
+    print(a)
\ No newline at end of file