code: def __init__(
      self,
      root: "HuffmanNode",
      bos="<s>",
      pad="<pad>",
      eos="</s>",
      unk="<unk>",
  ):
      self.root = root
      self.table = root.code_table()
      self.bos_word, self.unk_word, self.pad_word, self.eos_word = (
          bos,
          unk,
          pad,
          eos,
      )
  
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 1 to create a new HuffmanCoder object  with example: obj = HuffmanCoder(root, bos, pad, eos, unk)