Convert binary tree to mirror tree in python

Python program for Convert binary tree to mirror tree. Here more information.

#  Python 3 program for
#  Convert binary tree to it's mirror tree

#  Binary Tree Node
class TreeNode :
	def __init__(self, data) :
		#  Set node value
		self.data = data
		self.left = None
		self.right = None
	
class BinaryTree :
	def __init__(self) :
		self.root = None
	
	#  Display inorder element
	def inorder(self, node) :
		if (node != None) :
			self.inorder(node.left)
			#  Print node value
			print("", node.data, end = " ")
			self.inorder(node.right)
		
	
	#  Convert binary tree into mirror tree
	def mirrorTree(self, node) :
		if (node != None) :
			self.mirrorTree(node.left)
			self.mirrorTree(node.right)
			#  Change left and right child
			temp = node.left
			node.left = node.right
			node.right = temp

def main() :
	#  Create new tree
	tree = BinaryTree()
	#   Binary Tree
	#    -----------------------
	#         1
	#       /   \
	#      6     8
	#     / \   / \
	#    2   3 4   5
	#   /           \
	#  19            10
	#  Add element
	tree.root = TreeNode(1)
	tree.root.left = TreeNode(6)
	tree.root.left.left = TreeNode(2)
	tree.root.right = TreeNode(8)
	tree.root.right.right = TreeNode(5)
	tree.root.right.left = TreeNode(4)
	tree.root.left.right = TreeNode(3)
	tree.root.left.left.left = TreeNode(19)
	tree.root.right.right.right = TreeNode(10)
	print("\n Before convert", end = "")
	print("\n In-order Data : ", end = "")
	tree.inorder(tree.root)
	#  Transform into mirror tree
	tree.mirrorTree(tree.root)
	#    Mirror Tree
	#    --------------
	#         1
	#       /   \
	#      8     6
	#     / \   / \
	#    5   4 3   2
	#   /           \
	#  10            19
	print("\n After convert", end = "")
	print("\n In-order Data : ", end = "")
	tree.inorder(tree.root)

if __name__ == "__main__": main()

Output

 Before convert
 In-order Data :  19  2  6  3  1  4  8  5  10
 After convert
 In-order Data :  10  5  8  4  1  3  6  2  19