message: Remove the usage of TF private API ops.uid from Keras.
diff: @@ -21,6 +21,7 @@ from __future__ import print_function
  import os
  import shutil
  import tempfile
  +import uuid
  from absl.testing import parameterized
  import numpy as np
  @@ -1192,8 +1193,7 @@ class TestWeightSavingAndLoadingTFFormat(test.TestCase, parameterized.TestCase):
  m = DummySubclassModel()
  v = m.add_weight(name='v', shape=[])
  self.evaluate(v.assign(42.))
  - prefix = os.path.join(self.get_temp_dir(),
  - '{}'.format(ops.uid()), 'ckpt/')
  + prefix = os.path.join(self.get_temp_dir(), str(uuid.uuid4()), 'ckpt/')
  m.save_weights(prefix)
  self.evaluate(v.assign(2.))
  m.load_weights(prefix)
  @@ -1236,8 +1236,7 @@ class TestWeightSavingAndLoadingTFFormat(test.TestCase, parameterized.TestCase):
  m = DummySubclassModel()
  v = m.add_weight(name='v', shape=[])
  self.evaluate(v.assign(42.))
  - prefix = os.path.join(self.get_temp_dir(),
  - '{}'.format(ops.uid()), 'bckpt')
  + prefix = os.path.join(self.get_temp_dir(), str(uuid.uuid4()), 'bckpt')
  m.save_weights(prefix)
  self.evaluate(v.assign(2.))
  m.load_weights(prefix)
  