code: def test_deannualize():
      res = ffn.deannualize(0.05, 252)
      assert np.allclose(res, np.power(1.05, 1 / 252.0) - 1)
  
imports: import ffn
  import pandas
  import numpy
  from pytest import fixture
  from numpy.testing import assert_almost_equal
label_desc: Use image node_id 38 for calling a global function with example usage: test_deannualize() without return types