code: def __call__(self, event_index):
      return self.initial_value * self.gamma ** (event_index % 9)
  
imports: import re
  from pathlib import Path
  from unittest.mock import patch
  import pytest
  import torch
  import torch.nn
  from packaging.version import Version
  from ignite.engine import Engine, Events
  from ignite.handlers.state_param_scheduler import ExpStateScheduler, LambdaStateScheduler, MultiStepStateScheduler, PiecewiseLinearStateScheduler, StepStateScheduler
  from bisect import bisect_right
label_desc: Use image node_id 2 for calling the LambdaState obj's underlying member method code with example usage: obj.__call__(event_index) and returns: unknown