new_contents: #!/usr/bin/env python
  
  from __future__ import division, print_function, absolute_import
  
  from numpy.testing import (run_module_suite,
      assert_almost_equal, assert_allclose, assert_)
  
  import pywt
  
  
  def test_wavedec():
      x = [3, 7, 1, 1, -2, 5, 4, 6]
      db1 = pywt.Wavelet('db1')
      cA3, cD3, cD2, cD1 = pywt.wavedec(x, db1)
      assert_almost_equal(cA3, [8.83883476])
      assert_almost_equal(cD3, [-0.35355339])
      assert_allclose(cD2, [4., -3.5])
      assert_allclose(cD1, [-2.82842712, 0, -4.94974747, -1.41421356])
      assert_(pywt.dwt_max_level(len(x), db1) == 3)
  
  
  def test_waverec():
      x = [3, 7, 1, 1, -2, 5, 4, 6]
      coeffs = pywt.wavedec(x, 'db1')
      assert_allclose(pywt.waverec(coeffs, 'db1'), x, rtol=1e-12)
  
  
  def test_swt_decomposition():
      x = [3, 7, 1, 3, -2, 6, 4, 6]
      db1 = pywt.Wavelet('db1')
      (cA2, cD2), (cA1, cD1) = pywt.swt(x, db1, level=2)
      assert_allclose(cA1, [7.07106781, 5.65685425, 2.82842712, 0.70710678,
                            2.82842712, 7.07106781, 7.07106781, 6.36396103])
      assert_allclose(cD1, [-2.82842712, 4.24264069, -1.41421356, 3.53553391,
                            -5.65685425, 1.41421356, -1.41421356, 2.12132034])
      expected_cA2 = [7, 4.5, 4, 5.5, 7, 9.5, 10, 8.5]
      assert_allclose(cA2, expected_cA2, rtol=1e-12)
      expected_cD2 = [3, 3.5, 0, -4.5, -3, 0.5, 0, 0.5]
      assert_allclose(cD2, expected_cD2, rtol=1e-12)
  
      # level=1, start_level=1 decomposition should match level=2
      cA2, cD2 = pywt.swt(cA1, db1, level=1, start_level=1)
      assert_allclose(cA2, expected_cA2, rtol=1e-12)
      assert_allclose(cD2, expected_cD2, rtol=1e-12)
  
      coeffs = pywt.swt(x, db1)
      assert_(len(coeffs) == 3)
      assert_(pywt.swt_max_level(len(x)) == 3)
  
  
  if __name__ == '__main__':
      run_module_suite()
  
subject: convert multilevel doctests to nose format.