Find Bottom Left Tree Value (Leetcode 513)

Problem Link: https://leetcode.com/problems/find-bottom-left-tree-value/

class Solution:
    def findBottomLeftValue(self, root: Optional[TreeNode]) -> int:
        
        q=[root]
        while(len(q)>0):
            temp=[]
            for i in range(len(q)):
                node=q.pop()
                if(node.left is not None):
                    q.insert(0,node.left)
                if(node.right is not None):
                    q.insert(0,node.right)
                temp.append(node)
        return temp[0].val