docstr: Update characters state to match sre_parse object ``category``.
docstr_tok: ["Update","characters","state","to","match","sre_parse","object","``","category","``","."]
code: def add_category(self, category):
      """Update characters state to match sre_parse object ``category``."""
      self._whitelist_chars |= BYTES_LOOKUP[category]
  
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 3 for calling the BytesBuilder obj's underlying member method code with example usage: obj.add_category(category) without return types