code: def test_all(self):
      with self.test_session():
          X = tf.constant([[2.0, 2.5], [4.1, 5.0]])
          X2 = tf.constant([[1.5, 2.0], [3.1, 4.2]])
          lengthscale = tf.constant([2.0, 1.5])
          variance = tf.constant(1.4)
          self.assertAllClose(
              rbf(X, X2, lengthscale, variance).eval(),
              [[1.283597, 0.633180], [0.081387, 1.071704]],
              atol=1e-5,
              rtol=1e-5,
          )
  
file_path: edward/tests/util/rbf_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import tensorflow
  from edward.util import rbf
label_desc: Use image node_id 5 for calling the test_rbf_class obj's underlying member method code with example usage: obj.test_all() without return types