code: def isNan(x: float) -> bool:
      """Not a number test."""
      return x != x
  
imports: import asyncio
  import datetime
  import logging
  import math
  import signal
  import sys
  import time
  from dataclasses import fields, is_dataclass
  from typing import AsyncIterator, Awaitable, Callable, Iterator, List, Optional, Union
  import eventkit
label_desc: Use image node_id 13 for calling a global function with example usage: isNan(x) and returns: unknown