code: def _as_period(val, freq):
      return pd.Period(val, freq)
  
imports: import functools
  import logging
  import shutil
  from pathlib import Path
  from types import ModuleType
  from typing import Callable, List, NamedTuple, Optional, Union, cast
  import numpy
  import pandas
  from pandas.tseries.frequencies import to_offset
  from gluonts import json
  from gluonts.itertools import Cached, Map
  from gluonts.dataset.field_names import FieldName
  from gluonts.dataset.schema import Translator
  from gluonts.exceptions import GluonTSDataError
  from gluonts.pydantic import pydantic
  from .None import Dataset, DatasetCollection, DataEntry, DataBatch
  from .None import jsonl, DatasetWriter
label_desc: Use image node_id 6 for calling a global function with example usage: _as_period(val, freq) and returns: pd