code: def depth(self):
      d = getattr(self, "_depth", -1)
      if d != -1:
          return self._depth
      else:
          count = 0
          if self.num_children > 0:
              for i in range(self.num_children):
                  child_depth = self.children[i].depth()
                  if child_depth > count:
                      count = child_depth
              count += 1
          self._depth = count
          return self._depth
  
file_path: DeepKE/src/deepke/attribution_extraction/standard/module/GCN.py
imports: import logging
  import torch
  import numpy
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 5 for calling the Tree obj's underlying member method code with example usage: obj.depth() and returns: self, self