docstr: Add the bayes risk in multiple ways
docstr_tok: ["Add","the","bayes","risk","in","multiple","ways"]
code: def get_risk_scores(self, loss_state, hlens, risk_factor):
      """Add the bayes risk in multiple ways"""
      B, U, T = loss_state.size()
  
      if self.risk_strategy == "exp":
          risk = (
              torch.arange(1, T + 1, device=loss_state.device)
              .unsqueeze(0)
              .unsqueeze(0)
              .repeat(B, U, 1)
          )
          risk = risk / hlens.unsqueeze(1).unsqueeze(1) * risk_factor
  
      elif self.risk_strategy == "exp_rel":
          risk = (
              torch.arange(1, T + 1, device=loss_state.device)
              .unsqueeze(0)
              .unsqueeze(0)
              .repeat(B, U, 1)
          )
          max_stamp = torch.argmax(loss_state, dim=2, keepdim=True)
          risk = (
              (risk - max_stamp)
              / hlens.unsqueeze(1).unsqueeze(1)
              * risk_factor
          )
  
      else:
          raise NotImplementedError
  
      return -risk
  
file_path: espnet/espnet2/asr/bayes_risk_ctc.py
imports: import logging
  import _k2
  import k2
  import torch
label_desc: Use image node_id 4 for calling the BayesRiskCTC obj's underlying member method code with example usage: obj.get_risk_scores(loss_state, hlens, risk_factor) and returns: unknown