class_docstr: Convert between text-label and text-index 
class_docstr_tok: ["Convert","between","text-label","and","text-index"]
code: def decode_beamsearch(self, mat, beamWidth=5):
      texts = []
  
      for i in range(mat.shape[0]):
          t = ctcBeamSearch(
              mat[i],
              self.character,
              self.ignore_idx,
              None,
              beamWidth=beamWidth,
          )
          texts.append(t)
      return texts
  
imports: import torch
  import pickle
  import numpy
label_desc: Use image node_id 4 for calling the CTCLabelConverter obj's underlying member method code with example usage: obj.decode_beamsearch(mat, beamWidth) and returns: texts