code: def ungroup(expr: ParserElement) -> ParserElement:
      """Helper to undo pyparsing's default grouping of And expressions,
      even if all but one are non-empty.
      """
      return TokenConverter(expr).add_parse_action(lambda t: t[0])
  
imports: import html.entities
  import re
  import sys
  import typing
  from .None import __diag__
  from .core import *
  from .util import _bslash, _flatten, _escape_regex_range_chars, replaced_by_pep8
label_desc: Use image node_id 7 for calling a global function with example usage: ungroup(expr) and returns: TokenConverter