code: def convert_multiple(text: str) -> str:
      if text.isnumeric():
          return text
      if text == "half":
          return "0.5"
      raise ValueError(f"Unknown frequency multiple {text}.")
  
imports: from datetime import datetime
  from distutils.util import strtobool
  from types import SimpleNamespace
  from typing import Dict
  import numpy
  from toolz import compose_left
  from gluonts import json
  from gluonts.exceptions import GluonTSDataError
label_desc: Use image node_id 4 for calling a global function with example usage: convert_multiple(text) and returns: text, str