docstr: Tests whether loaded model from older gensim version can be trained correctly.
code: def test_train_old_model_after_load(self):
      """Tests whether loaded model from older gensim version can be trained correctly."""
      loaded = PoincareModel.load(datapath("poincare_test_3.4.0"))
      old_vectors = np.copy(loaded.kv.vectors)
      loaded.train(epochs=2)
      self.assertFalse(np.allclose(old_vectors, loaded.kv.vectors))
  
imports: import logging
  import os
  import tempfile
  import unittest
  import numpy
  from gensim.models.poincare import PoincareRelations, PoincareModel, PoincareKeyedVectors
  from gensim.test.utils import datapath
label_desc: Use image node_id 10 for calling the TestPoincareModel obj's underlying member method code with example usage: obj.test_train_old_model_after_load() without return types