code: def __hash__(self) -> int:
      return hash((str(self), self.freq))
  
imports: from __future__ import annotations
  import json
  import pyarrow
  from pandas._typing import IntervalClosedType
  from pandas.core.arrays.interval import VALID_CLOSED
label_desc: Use image node_id 7 for calling the ArrowPeriodType obj's underlying member method code with example usage: obj.__hash__() and returns: hash