code: def base_regex_strategy(regex, parsed=None, alphabet=None):
      if parsed is None:
          parsed = sre_parse.parse(regex.pattern, flags=regex.flags)
      try:
          s = _strategy(
              parsed,
              context=Context(flags=regex.flags),
              is_unicode=isinstance(regex.pattern, str),
              alphabet=alphabet,
          )
      except Exception as err:
          add_note(err, f"{alphabet=} {regex=}")
          raise
      return clear_cache_after_draw(s)
  
imports: import operator
  import re
  from hypothesis.errors import InvalidArgument
  from hypothesis.internal import charmap
  from hypothesis.strategies._internal.lazy import unwrap_strategies
  from hypothesis.strategies._internal.strings import OneCharStringStrategy
  from hypothesis import reject, strategies
  from hypothesis.internal.charmap import as_general_categories, categories
  from hypothesis.internal.compat import add_note, int_to_byte
label_desc: Use image node_id 7 for calling a global function with example usage: base_regex_strategy(regex, parsed, alphabet) and returns: clear_cache_after_draw