code: def test_sparse_lengths_ops(self):
      for itype in [np.int32, np.int64]:
          LengthsTester()._test(
              "SparseLengths",
              hu.sparse_lengths_tensor(
                  dtype=np.float32,
                  min_value=1,
                  max_value=5,
                  allow_empty=True,
                  itype=itype,
              ),
              REFERENCES_ALL,
          )(self)
  
imports: from functools import partial
  from hypothesis import given, settings
  import numpy
  import unittest
  import hypothesis.strategies
  from caffe2.python import core, workspace
  import caffe2.python.hypothesis_test_util
  import caffe2.python.serialized_test.serialized_test_util
label_desc: Use image node_id 7 for calling the TestSegmentOps obj's underlying member method code with example usage: obj.test_sparse_lengths_ops() without return types