docstr: remove the bitpadding.
  
  There will be a set of 0s preceded by a 1 at the end of the bitarray, we remove that
docstr_tok: ["remove","the","bitpadding",".","There","will","be","a","set","of","0s","preceded","by","a","1","at","the","end","of","the","bitarray",",","we","remove","that"]
code: def _unpad(self, a: bitarray) -> bitarray:
      """
      remove the bitpadding.
  
      There will be a set of 0s preceded by a 1 at the end of the bitarray, we remove that
      """
      # count the 0 padding at the end until we find the first 1
      # we want to remove the one too
      remove_cnt = util.rindex(a, 1)
      return a[:remove_cnt]
  
imports: import re
  import typing
  from collections import Counter, deque
  from dataclasses import dataclass
  from bitarray import bitarray, util
  from fairseq.data import Dictionary
label_desc: Use image node_id 3 for calling the HuffmanCoder obj's underlying member method code with example usage: obj._unpad(a) and returns: a