code: def __init__(self, negate=False, flags=0):
      self._whitelist_chars = set()
      self._blacklist_chars = set()
      self._negate = negate
      self._ignorecase = flags & re.IGNORECASE
      self.code_to_char = int_to_byte
  
imports: from __future__ import absolute_import, division, print_function
  import operator
  import re
  import sre_constants
  import sre_parse
  import sys
  import hypothesis.strategies
  from hypothesis import reject
  from hypothesis.internal.charmap import as_general_categories, categories
  from hypothesis.internal.compat import PY3, hrange, hunichr, int_to_byte, text_type
label_desc: Use image node_id 1 to create a new BytesBuilder object from inherited base classes: CharactersBuilder with example: obj = BytesBuilder(negate, flags)