code: def test_points_meth(self, xp, scp):
      func = scp.signal.CZT(12, m=11, w=2.0, a=1)
      return func.points()
  
imports: from math import pi
  import pytest
  import cupy
  import numpy
  from cupy import testing
  from cupy.testing import assert_allclose
  import cupyx.scipy.fft
  import cupyx.scipy.signal
label_desc: Use image node_id 3 for calling the TestCZTPoints obj's underlying member method code with example usage: obj.test_points_meth(xp, scp) and returns: func