class_docstr: Tests correctness of the Y = g(X) = (1 + exp(-X))^-1 transformation.
class_docstr_tok: ["Tests","correctness","of","the","Y","=","g","(","X",")","=","(","1","+","exp","(","-X",")",")","^-1","transformation","."]
code: def testScalarCongruency(self):
      bijector_test_util.assert_scalar_congruency(
          sigmoid.Sigmoid(),
          lower_x=-7.0,
          upper_x=7.0,
          eval_func=self.evaluate,
          rtol=0.1,
      )
  
imports: from absl.testing import parameterized
  import numpy
  from scipy import special
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import bijector_test_util
  from tensorflow_probability.python.bijectors import chain
  from tensorflow_probability.python.bijectors import scale
  from tensorflow_probability.python.bijectors import shift
  from tensorflow_probability.python.bijectors import sigmoid
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 2 for calling the SigmoidBijectorTest obj's underlying member method code with example usage: obj.testScalarCongruency() without return types