code: def test_can_instantiate(self):
      em = PowerLawEntropyModel(coding_rank=1)
      self.assertEqual(em.coding_rank, 1)
      self.assertEqual(em.bottleneck_dtype, tf.float32)
  
file_path: compression/tensorflow_compression/python/entropy_models/power_law_test.py
imports: import numpy
  import tensorflow
  from tensorflow_compression.python.entropy_models.power_law import PowerLawEntropyModel
label_desc: Use image node_id 1 for calling the PowerLawEntropyModelTest obj's underlying member method code with example usage: obj.test_can_instantiate() without return types