code: def setUp(self):
      self.logits = np.random.rand(self.batch_size, self.n)
      if self.wrap_by_variable:
          self.distrib = distribution.SoftmaxDistribution(
              chainer.Variable(self.logits),
              beta=self.beta,
              min_prob=self.min_prob,
          )
      else:
          self.distrib = distribution.SoftmaxDistribution(
              self.logits, beta=self.beta, min_prob=self.min_prob
          )
  
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 1 for calling the TestSoftmaxDistribution obj's underlying member method code with example usage: obj.setUp() without return types