code: def __call__(self, preds, batch, **kwargs):
      preds, labels = preds
      self.pred_list.extend(preds)
      self.gt_list.extend(labels)
  
file_path: PaddleOCR/ppocr/metrics/vqa_token_ser_metric.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import paddle
label_desc: Use image node_id 2 for calling the VQASerTokenMetric obj's underlying member method code with example usage: obj.__call__(preds, batch) without return types