code: def test_empty(self):
      bps = (0, 2500, 5000, 7500, 10000)
      buckets = [[0, 1, 0], [1, 2, 0], [2, 3, 0]]
      self.assertEqual(
          _make_expected_value(
              (0, 3.0),
              (2500, 3.0),
              (5000, 3.0),
              (7500, 3.0),
              (10000, 3.0),
          ),
          compressor.compress_histogram(buckets, bps),
      )
  
file_path: tensorboard/tensorboard/plugins/distribution/compressor_test.py
imports: import tensorflow
  from tensorboard.plugins.distribution import compressor
label_desc: Use image node_id 3 for calling the CompressorTest obj's underlying member method code with example usage: obj.test_empty() without return types