human
Solve the following python programming problem given the following code:
# Definition for a binary tree node.
# class TreeNode(object):
#     def __init__(self, x):
#         self.val = x
#         self.left = None
#         self.right = None

class Solution:
    # @param {TreeNode} root the root of binary tree
    # @return {int} the length of the longest consecutive sequence path
    def longestConsecutive2(self, root):
        # Write your code here
        longest, _, _, = self.helper(root)
        return longest
        
        
    def helper(self, root):
        if root is None:
            return 0, 0, 0
        
        left_len, left_down, left_up = self.helper(root.left)
        right_len, right_down, right_up = self.helper(root.right)
        down, up = 0, 0 
        
        if root.left is not None and root.left.val + 1 == root.val:
            down = max(down, left_down + 1)
        if root.left is not None and root.left.val - 1 == root.val:
            up = max(up, left_up + 1)
        if root.right is not None and root.right.val + 1 == root.val:
            down = max(down, right_down + 1)
        if root.right is not None and root.right.val - 1 == root.val:
            up = max(up, right_up + 1)
        
        len = down + up + 1
        len = max(len, left_len, right_len)
        
        return len, down, up
Given the above code, generate some markdown instructions for it.
assistant
#Here is the Python program you requested.

Follow up: Binary Tree Longest Consecutive Sequence II

Given a binary tree, find the length of the longest consecutive sequence path.
The path could be start and end at any node in the tree