Identical Binary Trees

class BinaryTree:
    def __init__(self, root):
        self.root = root
        self.leftChild = None
        self.rightChild = None
        
    def setRoot(self, root):
        self.root = root
        
    def getRoot(self):
        return self.root
    
    def getLeftChild(self):
        return self.leftChild
    
    def getRightChild(self):
        return self.rightChild
    
    def insertLeftChild(self, newNode):
        if self.leftChild == None:
            self.leftChild = BinaryTree(newNode)
        else:
            t = BinaryTree(newNode)
            t.leftChild = self.leftChild
            self.leftChild = t
            
    def insertRightChild(self, newNode):
        if self.rightChild == None:
            self.rightChild = BinaryTree(newNode)
        else:
            t = BinaryTree(newNode)
            t.rightChild = self.rightChild
            self.rightChild = t
  

def isStructurallyIdentical(tree1,tree2):
    if tree1 == None and tree2 == None:
        return True
    if tree1 == None or tree2 == None:
        return False
    
    return (tree1.root == tree2.root and isStructurallyIdentical(tree1.getLeftChild(), tree2.getLeftChild()) and isStructurallyIdentical(tree1.getRightChild(), tree2.getRightChild()) )

if __name__ == "__main__":        
        
    r = BinaryTree(5)
    r.insertLeftChild(6)
    r.insertRightChild(7)       
    r.leftChild.insertLeftChild(12)
    r.leftChild.insertRightChild(54)
    r.rightChild.insertRightChild(63)
    
    t = BinaryTree(5)
    t.insertLeftChild(6)
    t.insertRightChild(7)       
    t.leftChild.insertLeftChild(12)
    t.leftChild.insertRightChild(54)
    t.rightChild.insertRightChild(63)
    
    print isStructurallyIdentical(t,r)