code: def setUp(self):
      self.mean = np.random.normal(
          size=(self.batch_size, self.ndim)
      ).astype(np.float32)
      self.var = np.random.uniform(
          low=0.5, high=2.0, size=(self.batch_size, self.ndim)
      ).astype(np.float32)
      self.distrib = distribution.GaussianDistribution(
          self.mean, self.var
      )
  
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 TestGaussianDistribution obj's underlying member method code with example usage: obj.setUp() without return types