code: def tgrep_compile(tgrep_string):
      """
      Parses (and tokenizes, if necessary) a TGrep search string into a
      lambda function.
      """
      parser = _build_tgrep_parser(True)
      if isinstance(tgrep_string, bytes):
          tgrep_string = tgrep_string.decode()
      return list(parser.parseString(tgrep_string, parseAll=True))[0]
  
imports: import functools
  import re
  import nltk.tree
label_desc: Use image node_id 28 for calling a global function with example usage: tgrep_compile(tgrep_string) and returns: list