code: def test_estimate_batches(self):
      self.assertEqual(estimate_batches(3, 2), 2)
      self.assertEqual(estimate_batches(4, 2), 2)
      self.assertEqual(estimate_batches(1, 2), 1)
  
imports: import unittest
  import numpy
  import numpy.testing
  import scipy.sparse
  from cornac.utils.common import sigmoid
  from cornac.utils.common import safe_indexing
  from cornac.utils.common import validate_format
  from cornac.utils.common import scale
  from cornac.utils.common import clip
  from cornac.utils.common import excepts
  from cornac.utils.common import intersects
  from cornac.utils.common import estimate_batches
  from cornac.utils.common import get_rng
  from cornac.utils.common import normalize
label_desc: Use image node_id 8 for calling the TestCommon obj's underlying member method code with example usage: obj.test_estimate_batches() without return types