type object 'Yuanban' has no attribute 'n'

As an AI language model, I can provide an explanation for this error message:

This error message indicates that the object 'Yuanban' does not have an attribute 'n'. This means that the code is trying to access a variable or property called 'n' on an instance of the 'Yuanban' class, but that variable or property does not exist in the class definition.

There could be a few different reasons why this error is occurring. It's possible that the code is misspelling the name of the variable or property, or that it is trying to access an attribute that was not properly initialized or defined in the class. Another possibility is that the code is trying to access an attribute that is not applicable to the 'Yuanban' object.

To fix this error, you will need to review the code and determine why the 'n' attribute is being accessed and what it should be referring to. If the attribute is supposed to be part of the 'Yuanban' class, you may need to add it to the class definition or initialize it properly. If the attribute is not applicable to the 'Yuanban' object, you may need to revise the code to access a different attribute or object.