mirror_tree.py

# https://practice.geeksforgeeks.org/problems/mirror-tree/1/?company[]=Accolite&company[]=Accolite&page=1&query=company[]Accolitepage1company[]Accolite#
'''
class Node:
    def _init_(self, val):
        self.right = None
        self.data = val
        self.left = None
'''
# your task is to complete this function

class Solution:
    #Function to convert a binary tree into its mirror tree.
   
    def mirror(self,root):
   
        if(root == None):
            return
        else:
            self.mirror(root.left) #Call the left subtree
            self.mirror(root.right) # call the right subtree
            temp = root.left  # swap the left and right nodes
            root.left = root.right
            root.right = temp
            
        return root
        
        

#{ 
#  Driver Code Starts
#Initial Template for Python 3

from collections import deque
# Tree Node
class Node:
    def __init__(self, val):
        self.right = None
        self.data = val
        self.left = None


def inorderTraversalUtil(root):
    # Code here
    if root is None:
        return
    inorderTraversalUtil(root.left)
    print(root.data, end=' ')    
    inorderTraversalUtil(root.right)

def inorderTraversal(root):
    # Code here
    inorderTraversalUtil(root)
    print()
    
# Function to Build Tree   
def buildTree(s):
    #Corner Case
    if(len(s)==0 or s[0]=="N"):           
        return None
        
    # Creating list of strings from input 
    # string after spliting by space
    ip=list(map(str,s.split()))
    
    # Create the root of the tree
    root=Node(int(ip[0]))                     
    size=0
    q=deque()
    
    # Push the root to the queue
    q.append(root)                            
    size=size+1 
    
    # Starting from the second element
    i=1                                       
    while(size>0 and i<len(ip)):
        # Get and remove the front of the queue
        currNode=q[0]
        q.popleft()
        size=size-1
        
        # Get the current node's value from the string
        currVal=ip[i]
        
        # If the left child is not null
        if(currVal!="N"):
            
            # Create the left child for the current node
            currNode.left=Node(int(currVal))
            
            # Push it to the queue
            q.append(currNode.left)
            size=size+1
        # For the right child
        i=i+1
        if(i>=len(ip)):
            break
        currVal=ip[i]
        
        # If the right child is not null
        if(currVal!="N"):
            
            # Create the right child for the current node
            currNode.right=Node(int(currVal))
            
            # Push it to the queue
            q.append(currNode.right)
            size=size+1
        i=i+1
    return root
    
    
if __name__=="__main__":
    t=int(input())
    for _ in range(0,t):
        s=input()
        root=buildTree(s)
        Solution().mirror(root)
        inorderTraversal(root)
        
        

# } Driver Code Ends