code: def __init__(self, model, bs):
      self.data_loader = None
      self.optimizer = None
      self.model = model
      self.batch_size = bs
  
imports: import json
  import logging
  import os.path
  from pathlib import Path
  from tempfile import TemporaryDirectory
  from typing import Tuple, List, Any, Dict
  import torch
  from sparseml.onnx.optim import ModelAnalyzer, pruning_loss_sens_magnitude
  from sparseml.pytorch.optim import ScheduledModifierManager
  from sparseml.pytorch.sparsification import EpochRangeModifier, GMPruningModifier
  from sparseml.pytorch.utils import ModuleExporter
  from sparsify.blueprints.utils import default_epochs_distribution, PruningModelEvaluator, default_pruning_settings
  from sparsify.schemas import ProjectModelAnalysisSchema
  from torch.nn import CrossEntropyLoss, MSELoss
  from torch.optim import SGD
  from tqdm.auto import tqdm
label_desc: Use image node_id 1 to create a new PruningTrainer object  with example: obj = PruningTrainer(model, bs)