code: def isatty(stream: "Optional[TextIO]") -> bool:
      if stream is None:
          return False
      return stream.isatty()
  
imports: import hashlib
  import json
  import os
  import re
  import sys
  from typing import TYPE_CHECKING, Dict, Iterable, Iterator, List, Optional, Tuple
  import colorama
label_desc: Use image node_id 25 for calling a global function with example usage: isatty(stream) and returns: stream, False