code: def test_self_kl(self):
      kl = self.distrib.kl(self.distrib)
      for b in range(self.batch_size):
          np.testing.assert_allclose(
              kl.array[b], np.zeros_like(kl.array[b]), rtol=1e-5
          )
  
imports: import unittest
  import chainer
  from chainer import testing
  from chainer.testing import condition
  import numpy
  import scipy.stats
  from chainerrl import distribution
label_desc: Use image node_id 8 for calling the TestMellowmaxDistribution obj's underlying member method code with example usage: obj.test_self_kl() without return types