code: def test_copy(self):
      another = self.distrib.copy()
      self.assertIsNot(self.distrib, another)
      self.assertIsNot(self.distrib.logits, another.logits)
  
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 9 for calling the TestSoftmaxDistribution obj's underlying member method code with example usage: obj.test_copy() without return types