code: def lr_lambda(self, step):
      return self._lambda_func(step, self._global_config)
  
file_path: mmf/mmf/modules/schedulers.py
imports: from bisect import bisect_right
  from mmf.common.registry import registry
  from torch.optim.lr_scheduler import LambdaLR
label_desc: Use image node_id 2 for calling the PythiaScheduler obj's underlying member method code with example usage: obj.lr_lambda(step) and returns: self