symmetricTree.py

class TreeNode:
   def __init__(self, data, left = None, right = None):
      self.data = data
      self.left = left
      self.right = right
def insert(temp,data):
   que = []
   que.append(temp)
   while (len(que)):
      temp = que[0]
      que.pop(0)
      if (not temp.left):
         if data is not None:
            temp.left = TreeNode(data)
         else:
            temp.left = TreeNode(0)
         break
      else:
         que.append(temp.left)
      if (not temp.right):
         if data is not None:
            temp.right = TreeNode(data)
         else:
            temp.right = TreeNode(0)
         break
      else:
         que.append(temp.right)
def make_tree(elements):
   Tree = TreeNode(elements[0])
   for element in elements[1:]:
      insert(Tree, element)
   return Tree
class Solution(object):
   def isSymmetric(self, root):
      """
      :type root: TreeNode
      :rtype: bool
      """
      return self.solve(root,root)
   def solve(self,node1,node2):
      if not node1 and not node2:
         return True
      if not node1 or not node2:
         return False
      # print(node1.val, node2.val)
      return node1.data == node2.data and
self.solve(node1.left,node2.right) and
self.solve(node1.right,node2.left)
tree1 = make_tree([1,2,2,3,4,4,3])
tree2 = make_tree([1,2,2,3,4,None,3])
ob1 = Solution()
print(ob1.isSymmetric(tree1))
print(ob1.isSymmetric(tree2))