code: def setUp(self):
      self.dtype = np.float32
  
imports: import collections
  import warnings
  import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.mcmc import kernel
  from tensorflow_probability.python.mcmc import metropolis_hastings
  from tensorflow_probability.python.mcmc.internal.util import is_list_like
label_desc: Use image node_id 1 for calling the MetropolisHastingsTest obj's underlying member method code with example usage: obj.setUp() without return types