code: def __init__(self, num_phases: int):
      self.num_phases = num_phases
      self.phase_counter = 0
  
imports: import os
  import unittest
  from functools import wraps
  import torch
  from classy_vision.hooks import ClassyHook
  from classy_vision.tasks import ClassyTask
  from classy_vision.trainer import ClassyTrainer
label_desc: Use image node_id 1 to create a new LimitedPhaseHook object from inherited base classes: ClassyHook with example: obj = LimitedPhaseHook(num_phases)