<doocs>0129.Sum Root to Leaf Numbers_1.py
def dfs(root, presum):
    if root is None:
        return 0
    s = 10 * presum + root.val
    if root.left is None and root.right is None:
        return s
    return dfs(root.left, s) + dfs(root.right, s)
def sample_funcname ( var_1 , var_2 ) :
    if var_1 is None :
        return 0
    var_7 = 10 * var_2 + var_1.val
    if var_1.left is None and var_1.right is None :
        return var_7
    return var_0 ( var_1.left , var_7 ) + var_0 ( var_1.right , var_7 )
