code: def getBytecode(self) -> bytes:
      if not hasattr(self, "bytecode"):
          self._assemble()
      return self.bytecode.tobytes()
  
imports: from __future__ import annotations
  from fontTools.misc.textTools import num2binary, binary2num, readHex, strjoin
  import array
  from io import StringIO
  from typing import List
  import re
  import logging
label_desc: Use image node_id 4 for calling the Program obj's underlying member method code with example usage: obj.getBytecode() and returns: self