code: def dtype(request):
      return PeriodDtype(freq=request.param)
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING
  import numpy
  import pytest
  from pandas._libs import Period, iNaT
  from pandas.compat import is_platform_windows
  from pandas.compat.numpy import np_version_gte1p24
  from pandas.core.dtypes.dtypes import PeriodDtype
  import pandas._testing
  from pandas.core.arrays import PeriodArray
  from pandas.tests.extension import base
label_desc: Use image node_id 1 for calling a global function with example usage: dtype(request) and returns: PeriodDtype