code: def reset(self, stage="train"):
      self._stage = stage
      self._loss_meters = {}
      self._finalised = False
  
imports: import os
  import torchnet
  import torch
  from typing import Dict, Any
  import wandb
  from torch.utils.tensorboard import SummaryWriter
  import logging
  from torch_points3d.models import model_interface
label_desc: Use image node_id 2 for calling the BaseTracker obj's underlying member method code with example usage: obj.reset(stage) without return types