docstr: pred is a list of token label index
docstr_tok: ["pred","is","a","list","of","token","label","index"]
code: def _process_pred(self, pred: List[int]) -> List[str]:
      """pred is a list of token label index"""
      return [self.tensorizer.labels_vocab[p] for p in pred]
  
imports: import re
  import string
  from typing import Dict, List, Set, Tuple, Union
  import numpy
  from pytext.common.constants import Stage
  from pytext.metric_reporters.channel import Channel, ConsoleChannel, FileChannel
  from pytext.metric_reporters.metric_reporter import MetricReporter
  from pytext.metrics.squad_metrics import SquadMetrics
  from pytext.utils.data import merge_token_labels_to_slot, parse_slot_string, Slot
  from scipy.optimize import linear_sum_assignment
label_desc: Use image node_id 12 for calling the MultiSpanQAMetricReporter obj's underlying member method code with example usage: obj._process_pred(pred) and returns: unknown