code: def setUp(self):
      self.support = "real"
      if not hasattr(self, "event_shape"):
          self.event_shape = ()
      self.continuous = True
      self.test_targets = set()
      self.options = {}
  
      self.setUp_configure()
  
      targets_not_found = self.test_targets - {
          "batch_shape",
          "cdf",
          "entropy",
          "event_shape",
          "icdf",
          "log_cdf",
          "log_prob",
          "log_survival",
          "mean",
          "prob",
          "sample",
          "stddev",
          "support",
          "survival",
          "variance",
      }
      if targets_not_found:
          raise ValueError(
              "invalid target(s): {}".format(targets_not_found)
          )
  
      if self.is_variable:
          self.params = {
              k: chainer.Variable(v) for k, v in self.params.items()
          }
  
imports: import functools
  import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer.testing import array
  from chainer.testing import attr
  from chainer import utils
label_desc: Use image node_id 1 for calling the distribution_unittest obj's underlying member method code with example usage: obj.setUp() without return types