# Display List Code Below:
def height(node):
	if (node == None):
		return 0
	return 1 + max(height(node.left), height(node.right))

def draw_node(output, link_above, node, level, p, link_char):
	if (node == None): 
 		return

	out = "["
	h = len(output)
	SP = " "

	if (p < 0):
		for s in output:
			if (s):
				s = " "*(-1*p) + s
    
		for s in link_above:
			if (s):
				s = " "*(-1*p) + s

	if level < h - 1:
		p = max(p, len(output[level + 1]))
	if (level > 0):
		p = max(p, len(output[level - 1]))
	p = max(p, len(output[level]))

	# Fill in to left
	if (node.left):
		leftData = SP + str(node.left.data) + SP
		draw_node(output, link_above, node.left, level + 1, p - len(leftData),'L')
		p = max(p, len(output[level + 1]))

	# Enter this data
	space = p - len(output[level])
	if (space > 0):
		output[level] += (' ' * space)
	node_data = SP + str(node.data) + SP
	output[level] += node_data

	# Add vertical link above
	space = p + len(SP) - len(link_above[level])
	if (space > 0):
		link_above[level] += (' ' * space)
	link_above[level] += link_char

	# Fill in to right
	if (node.right):
		draw_node(output, link_above, node.right, level + 1, len(output[level]),'R')
  
def display_tree(root):
	if (root == None):
		print("\tNone")
	h = height(root)
	output = []
	link_above = []
	for i in range(0,h): 
				output.append("")
				link_above.append("")
	draw_node(output, link_above, root, 0, 5, ' ')

	# Create link lines
	for i in range(h):
		for j in range(len(link_above[i])):
			if (link_above[i][j] != ' '):
				size = len(output[i - 1])
				if (size < j + 1):
					output[i - 1] += " " *(j + 1 - size)
				jj = j
				if (link_above[i][j] == 'L'):
					while (output[i - 1][jj] == ' '):
						jj += 1
					for k in range(j+1, jj-1):
						str1 = output[i - 1]
						list1 = list(str1)
						list1[k] = '_'
						output[i - 1] = ''.join(list1)
				elif(link_above[i][j] == 'R'):
					while (output[i - 1][jj] == ' '):
						jj-=1
					
					# k = j-1
					for k in range(j-1,jj+1,-1):
						temp = output[i - 1]
						list1 = list(temp)
						list1[k] = '_'
						output[i - 1] = ''.join(list1)
						k = k - 1
      
				str1 = link_above[i]
				list1 = list(str1)
				list1[j] = '|'
				link_above[i] = ''.join(list1)
					
	# Output
	for i in range(h):
		if (i):
			print("\t" , link_above[i])
		print("\t" , output[i])from collections import deque
from BinaryTree import *
from TreeNode import *


def level_order_traversal(root):
    result = []

    if not root:
        result = "None"
        return result

    current_queue = deque()
    current_queue.append(root)

    while current_queue:
        level_size = len(current_queue)
        level_nodes = []

        for _ in range(level_size):
            temp = current_queue.popleft()
            level_nodes.append(str(temp.data))

            if temp.left:
                current_queue.append(temp.left)
            if temp.right:
                current_queue.append(temp.right)

        result.append(", ".join(level_nodes))

    return " : ".join(result)


def main():
    test_cases_roots = []

    input1 = [
        TreeNode(100),
        TreeNode(50),
        TreeNode(200),
        TreeNode(25),
        TreeNode(75),
        TreeNode(350)
    ]
    tree1 = BinaryTree(input1)
    test_cases_roots.append(tree1.root)

    input2 = [
        TreeNode(25),
        TreeNode(50),
        None,
        TreeNode(100),
        TreeNode(200),
        TreeNode(350)
    ]
    tree2 = BinaryTree(input2)
    test_cases_roots.append(tree2.root)

    input3 = [
        TreeNode(350),
        None,
        TreeNode(100),
        None,
        TreeNode(50),
        TreeNode(25)
    ]
    tree3 = BinaryTree(input3)
    test_cases_roots.append(tree3.root)

    tree4 = BinaryTree([TreeNode(100)])
    test_cases_roots.append(tree4.root)

    test_cases_roots.append(None)

    for i in range(len(test_cases_roots)):
        if i > 0:
            print()
        print(i + 1, ".\tBinary Tree")
        display_tree(test_cases_roots[i])
        print("\n\tLevel order traversal: ")
        print("\t",level_order_traversal(test_cases_roots[i]))
        print("\n" + '-' * 100)


if __name__ == '__main__':
    main()