code: def test_kaiser_atten():
      a = kaiser_atten(1, 1.0)
      assert_equal(a, 7.95)
      a = kaiser_atten(2, 1 / np.pi)
      assert_equal(a, 2.285 + 7.95)
  
imports: from __future__ import division, print_function, absolute_import
  import numpy
  from numpy.testing import assert_almost_equal, assert_array_almost_equal, assert_equal, assert_, assert_allclose, assert_warns
  from pytest import raises
  from scipy.special import sinc
  from scipy.signal import kaiser_beta, kaiser_atten, kaiserord, firwin, firwin2, freqz, remez, firls, minimum_phase
label_desc: Use image node_id 2 for calling a global function with example usage: test_kaiser_atten() without return types