code: def test_add_points_batch5(self):
      data = np.array(
          [[0.34, 0.54], [0.55, 0.52], [0.21, 0.68]], dtype=np.float32
      )
      positions = nmslib.addDataPointBatch(
          self.index, np.array([0, 1, 2], dtype=np.int32), data
      )
      nt.assert_array_equal(
          np.array([0, 1, 2], dtype=np.int32), positions
      )
  
imports: import unittest
  import numpy.testing
  import os
  import numpy
  import nmslib
label_desc: Use image node_id 7 for calling the DenseTests obj's underlying member method code with example usage: obj.test_add_points_batch5() without return types