code: def test_entropy_base(self):
      pk = np.ones(16, float)
      S = stats.entropy(pk, base=2.0)
      assert_(abs(S - 4.0) < 1.0e-5)
  
      qk = np.ones(16, float)
      qk[:8] = 2.0
      S = stats.entropy(pk, qk)
      S2 = stats.entropy(pk, qk, base=2.0)
      assert_(abs(S / S2 - np.log(2.0)) < 1.0e-5)
  
imports: import numpy
  from numpy.testing import assert_equal, assert_allclose
  from numpy.testing import assert_, assert_almost_equal, assert_array_almost_equal
  import pytest
  from pytest import raises
  import scipy.stats
label_desc: Use image node_id 2 for calling the TestEntropy obj's underlying member method code with example usage: obj.test_entropy_base() without return types