code: def _get_now_str(timestamp: float) -> str:
      """Standard format for datetimes is defined here."""
      return datetime.fromtimestamp(timestamp).strftime(
          "%Y-%m-%d_%H-%M-%S"
      )
  
file_path: anomalib/src/anomalib/config/config.py
imports: from __future__ import annotations
  import time
  import warnings
  from datetime import datetime
  from pathlib import Path
  from warnings import warn
  from omegaconf import DictConfig, ListConfig, OmegaConf
  from anomalib.data.utils import TestSplitMode, ValSplitMode
label_desc: Use image node_id 1 for calling a global function with example usage: _get_now_str(timestamp) and returns: datetime