code: def __init__(self, num_categories: int = -1):
      super().__init__()
      self.num_categories = num_categories
  
file_path: vision/torchvision/prototype/transforms/_type_conversion.py
imports: from typing import Any, Dict
  import torch
  from torch.nn.functional import one_hot
  from torchvision.prototype import tv_tensors
  from torchvision.transforms.v2 import Transform
label_desc: Use image node_id 1 to create a new LabelToOneHot object from inherited base classes: Transform with example: obj = LabelToOneHot(num_categories)