<doocs>1457.Pseudo-Palindromic Paths in a Binary Tree_1.py
def dfs(root):
    if root is None:
        return
    nonlocal ans, counter
    counter[root.val] += 1
    if root.left is None and root.right is None:
        if sum(1 for i in range(1, 10) if counter[i] % 2 == 1) < 2:
            ans += 1
    else:
        dfs(root.left)
        dfs(root.right)
    counter[root.val] -= 1
def sample_funcname ( var_1 ) :
    if var_1 is None :
        return
    nonlocal var_3 , var_4
    var_4 [ var_1.val ] += 1
    if var_1.left is None and var_1.right is None :
        if sum ( 1 for var_12 in range ( 1 , 10 ) if var_4 [ var_12 ] % 2 == 1 ) < 2 :
            var_3 += 1
    else :
        var_0 ( var_1.left )
        var_0 ( var_1.right )
    var_4 [ var_1.val ] -= 1
