docstr: Number of upsample operations
          
docstr_tok: ["Number","of","upsample","operations"]
code: def num_upsample(self):
      """Number of upsample operations"""
      return (
          len(self.upsample)
          if hasattr(self, "upsample") and self.upsample
          else 0
      )
  
file_path: torch-points3d/torch_points3d/datasets/multiscale_data.py
imports: from typing import List, Optional
  import torch
  import copy
  import torch_geometric
  from torch_geometric.data import Data
  from torch_geometric.data import Batch
label_desc: Use image node_id 4 for calling the MultiScaleData obj's underlying member method code with example usage: obj.num_upsample() and returns: unknown