code: def test_pchip_interpolate(self, xp, scp):
      r1 = scp.interpolate.pchip_interpolate(
          [1, 2, 3], [4, 5, 6], [0.5], der=1
      )
      r2 = scp.interpolate.pchip_interpolate(
          [1, 2, 3], [4, 5, 6], [0.5], der=0
      )
      r3 = scp.interpolate.pchip_interpolate(
          [1, 2, 3], [4, 5, 6], [0.5], der=[0, 1]
      )
      return r1, r2, xp.asarray(r3)
  
imports: import io
  import warnings
  import numpy
  import pytest
  import cupy
  from cupy.cuda import runtime
  from cupy import testing
  import cupyx.scipy.interpolate
  from cupyx.scipy.interpolate import CubicHermiteSpline
label_desc: Use image node_id 9 for calling the TestPCHIP obj's underlying member method code with example usage: obj.test_pchip_interpolate(xp, scp) and returns: r1,  r2,  xp