Python

This is the requirement of the assignment

Problem (1) Create Node Classes
Node classes have _data and _next as member variables. Values of _data and _next member variables must be readable and changeable through Python properties.
Generates _data and next member variables from the init of the Node class.
It is implemented so that the value of each member variable can be read through @property.
@.Implementation to change the value of each member variable through setter.

And there’s also a template.

class Node(object):
    
    def __init__(self, data=None):
        pass

This is the code I wrote.

class Node(object):
    def __init__(self, data=None):
        self._data = data
        self._next = None

    @property
    def data(self):
        return self._data

    @property
    def next(self):
        return self._next

    @data.setter
    def data(self, new_data):
        self._data = new_data

    @next.setter
    def next(self, new_next):
        self._next = new_next

There are member variables, properties, and setters. What’s the problem? In the assignment submission column, it keeps saying “An instance of node class should have _data member variable.”

Please help me.

Create Node Classes with Python