code: def get_ignored_tokens(self):
      pad_idx = self.dict[self.pad_str]
      start_idx = self.dict[self.beg_str]
      end_idx = self.dict[self.end_str]
      unknown_idx = self.dict[self.unknown_str]
      return [start_idx, end_idx, pad_idx, unknown_idx]
  
file_path: PaddleOCR/ppocr/postprocess/table_postprocess.py
imports: import numpy
  import paddle
  from .rec_postprocess import AttnLabelDecode
label_desc: Use image node_id 3 for calling the TableMasterLabelDecode obj's underlying member method code with example usage: obj.get_ignored_tokens() and returns: list