code: def _create_auto_file_name(
      filename_prefix: str,
      ext: str,
      timestamp_format: str = "%Y%m%d_%H%M%S",
  ) -> str:
      timestamp = datetime.now().strftime(timestamp_format)
      filename = filename_prefix + timestamp + "." + ext
      return filename
  
imports: import os
  import sys
  import logging
  import importlib
  from abc import abstractmethod
  from datetime import datetime
  from typing import Union, Tuple
  from collections import OrderedDict
  import numpy
  import pandas
  from IPython.display import display, clear_output
  from pandas.plotting import register_matplotlib_converters
  from tensortrade.oms.orders import TradeSide
  from tensortrade.env.generic import Renderer, TradingEnv
label_desc: Use image node_id 1 for calling a global function with example usage: _create_auto_file_name(filename_prefix, ext, timestamp_format) and returns: filename