code: def __hash__(self):
      # type: () -> int
      return hash(self._key)
  
imports: from __future__ import absolute_import, division, print_function
  import collections
  import itertools
  import re
  import warnings
  from ._structures import Infinity, NegativeInfinity
  from ._typing import TYPE_CHECKING
label_desc: Use image node_id 1 for calling the _BaseVersion obj's underlying member method code with example usage: obj.__hash__() and returns: hash