what is causing the error and how can I remove it.
error:Cannot assign member "left" for type "Node"
Expression of type "Node" cannot be assigned to member "left" of class "Node"
Type cannot be assigned to type "None"
self.left = None
self.right = None
self.value = value
self.root = Node(root)
my_tree = binary_tree(10)
my_tree.root.left = Node(12)
my_tree.root.right = Node(8)