class_docstr: Abstract decoder module.
class_docstr_tok: ["Abstract","decoder","module","."]
docstr: Get specified ID state from batch of states, if provided.
  
  Args:
      states: Decoder hidden states.
      idx: State ID to extract.
  
  Returns:
      : Decoder hidden state for given ID.
docstr_tok: ["Get","specified","ID","state","from","batch","of","states",",","if","provided",".","Args",":","states",":","Decoder","hidden","states",".","idx",":","State","ID","to","extract",".","Returns",":",":","Decoder","hidden","state","for","given","ID","."]
code: def select_state(
      self,
      states: Union[
          List[Dict[str, torch.Tensor]],
          List[torch.Tensor],
          Tuple[torch.Tensor, Optional[torch.Tensor]],
      ],
      idx: int = 0,
  ) -> Union[
      List[Dict[str, torch.Tensor]],
      List[torch.Tensor],
      Tuple[torch.Tensor, Optional[torch.Tensor]],
  ]:
      """Get specified ID state from batch of states, if provided.
  
      Args:
          states: Decoder hidden states.
          idx: State ID to extract.
  
      Returns:
          : Decoder hidden state for given ID.
  
      """
      raise NotImplementedError
  
file_path: espnet/espnet2/asr_transducer/decoder/abs_decoder.py
imports: from abc import ABC, abstractmethod
  from typing import Any, Dict, List, Optional, Tuple, Union
  import torch
label_desc: Use image node_id 6 for calling the AbsDecoder obj's underlying member method code with example usage: obj.select_state(states, idx) without return types