code: def test_hash(self):
      stereo = ccrs.Stereographic(90)
      north = ccrs.NorthPolarStereo()
      assert stereo == north
      assert not stereo != north
      assert hash(stereo) == hash(north)
  
      assert ccrs.Geodetic() == ccrs.Geodetic()
  
imports: import copy
  from io import BytesIO
  import os
  from pathlib import Path
  import pickle
  import warnings
  import numpy
  from numpy.testing import assert_almost_equal, assert_array_equal
  from numpy.testing import assert_array_almost_equal
  import pyproj
  import pytest
  import shapely.geometry
  import cartopy.crs
label_desc: Use image node_id 1 for calling the TestCRS obj's underlying member method code with example usage: obj.test_hash() without return types