code: def freq(arg) -> Freq:
      if isinstance(arg, Freq):
          return arg
  
      return Freq.from_pandas(arg)
  
imports: from __future__ import annotations
  import re
  from dataclasses import dataclass
  from typing import Tuple, Optional
  import numpy
  from gluonts import maybe
label_desc: Use image node_id 3 for calling a global function with example usage: freq(arg) and returns: Freq, arg