code: def sample_for_binary_check_test(self):
      smp = numpy.random.uniform(
          low=0.1, high=0.9, size=self.sample_shape + self.shape
      ).astype(numpy.float32)
      return smp
  
imports: import unittest
  import numpy
  from chainer import backend
  from chainer.backends import cuda
  from chainer import distributions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 4 for calling the TestBernoulli obj's underlying member method code with example usage: obj.sample_for_binary_check_test() and returns: smp