code: def test_sparse_segment_grad(self, op_func):
      grad = random_ops.random_uniform([3, 3, 2])
      indices = constant_op.constant([1, 2, 3])
      seg_ids = constant_op.constant([0, 0, 2])
      dim0 = 4
  
      def loop_fn(i):
          grad_i = array_ops.gather(grad, i)
          return op_func(grad_i, indices, seg_ids, dim0)
  
      self._test_loop_fn(loop_fn, 3)
  
imports: import itertools
  from absl.testing import parameterized
  from tensorflow.python.eager import backprop
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import clip_ops
  from tensorflow.python.ops import linalg_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import nn
  from tensorflow.python.ops import random_ops
  from tensorflow.python.ops import special_math_ops
  from tensorflow.python.ops import tensor_array_grad
  from tensorflow.python.ops.parallel_for import control_flow_ops
  from tensorflow.python.ops.parallel_for.test_util import PForTestCase
  from tensorflow.python.platform import test
label_desc: Use image node_id 25 for calling the MathTest obj's underlying member method code with example usage: obj.test_sparse_segment_grad(op_func) and returns: op_func