[Tutor] Instance into another instance

[Ismael Garrido]

Hello.

This is my code:
class Node:
    def __init__(self, tag, value=None, **kwargs):
        self.tag = tag
        self.value = value
        self.kwargs = kwargs
        self.childs = []

    def addChild(self, tag, value=None, **kwargs):
        node = Node(tag, value, kwargs)
        self.childs.append(node)

    def __repr__(self):
        return "Tag %s ; value %s ; kwargs %s ; childs %s" % (self.tag, 
self.value, self.kwargs, self.childs)
        
And this is what I do to test it:
 >>> ppal = Node("Test", value="Test")
 >>> ppal.addChild("test", value=2)

Traceback (most recent call last):
  File "<pyshell#75>", line 1, in -toplevel-
    ppal.addChild("test", value=2)
  File "...node.py", line 10, in addChild
    node = Node(tag, value, kwargs)
TypeError: __init__() takes at most 3 arguments (4 given)

I don't understand. Why 4 arguments are given? What can I do to solve that?

The idea of the class is to be able to create a "tree". Where each node 
can have subnodes, which in turn can have their subnodes...

Thanks
Ismael