<doocs>0863.All Nodes Distance K in Binary Tree_1.py
def parents(root, prev):
    nonlocal p
    if root is None:
        return
    p[root] = prev
    parents(root.left, root)
    parents(root.right, root)
def sample_funcname ( var_1 , var_2 ) :
    nonlocal var_3
    if var_1 is None :
        return
    var_3 [ var_1 ] = var_2
    var_0 ( var_1.left , var_1 )
    var_0 ( var_1.right , var_1 )
