code: def __hash__(self):
      return hash(tuple(getattr(self, attr) for attr in self._metadata))
  
imports: import numpy
  from pandas.errors import AbstractMethodError
  from pandas.core.dtypes.generic import ABCDataFrame, ABCIndexClass, ABCSeries
  from pandas import compat
label_desc: Use image node_id 2 for calling the _DtypeOpsMixin obj's underlying member method code with example usage: obj.__hash__() and returns: hash