code: def test_rank_deficient_2(self, xp, scp):
      # switch to pinvh (tolerances could be higher with longer
      # filters, but using shorter ones is faster computationally and
      # the idea is the same)
      x = scp.signal.firls(101, [0, 0.01, 0.99, 1], [1, 1, 0, 0])
      w, h = scp.signal.freqz(x, fs=2.0)
      return x, w, h
  
imports: import cupy
  import cupyx.scipy.signal
  from cupy import testing
  import pytest
  from pytest import raises
label_desc: Use image node_id 8 for calling the TestFirls obj's underlying member method code with example usage: obj.test_rank_deficient_2(xp, scp) and returns: x,  w,  h