code: def is_timestamp(value: Any) -> bool:
      """Check if value is a valid timestamp."""
      if isinstance(value, bool):
          return False
      if not isinstance(value, (int, float, str)):
          return False
      try:
          float(value)
          return True
      except ValueError:
          return False
  
file_path: arrow-py/arrow/util.py
imports: import datetime
  from typing import Any, Optional, cast
  from dateutil.rrule import WEEKLY, rrule
  from arrow.constants import MAX_ORDINAL, MAX_TIMESTAMP, MAX_TIMESTAMP_MS, MAX_TIMESTAMP_US, MIN_ORDINAL
label_desc: Use image node_id 2 for calling a global function with example usage: is_timestamp(value) and returns: False, False, True, False