class_docstr: Compute the input feature from neighbors
code: def __init__(self, n_neighbor):
      super(RelativePositionMessage, self).__init__()
      self.n_neighbor = n_neighbor
  
imports: import dgl
  import torch
  import torch.nn
  import torch.nn.functional
  from torch.autograd import Function
  from torch.nn import Parameter
  from torch.nn.modules.utils import _single
label_desc: Use image node_id 1 to create a new RelativePositionMessage object from inherited base classes: nn with example: obj = RelativePositionMessage(n_neighbor)