code: def __init__(self, callback):
      self.callback = callback
  
imports: from __future__ import absolute_import
  import os
  import sys
  import re
  import io
  import codecs
  import shutil
  import tempfile
  from contextlib import contextmanager
label_desc: Use image node_id 1 to create a new LazyStr object  with example: obj = LazyStr(callback)