code: def __init__(self, freq) -> None:
      # attributes need to be set first before calling
      # super init (as that calls serialize)
      self._freq = freq
      pyarrow.ExtensionType.__init__(
          self, pyarrow.int64(), "pandas.period"
      )
  
imports: from __future__ import annotations
  import json
  from typing import TYPE_CHECKING
  import pyarrow
  from pandas.compat import pa_version_under14p1
  from pandas.core.dtypes.dtypes import IntervalDtype, PeriodDtype
  from pandas.core.arrays.interval import VALID_CLOSED
label_desc: Use image node_id 1 to create a new ArrowPeriodType object from inherited base classes: pyarrow with example: obj = ArrowPeriodType(freq)