code: def test_periodic_points_exception(self, xp, scp):
      # first and last points should match when periodic case expected
      n, k = 8, 5
      x = xp.linspace(0, n, n)
      y = x
      return scp.interpolate.make_interp_spline(
          x, y, k=k, bc_type="periodic"
      )
  
imports: import pytest
  import cupy
  from cupy import testing
  from cupy.cuda import runtime
  import numpy
  import cupyx.scipy.interpolate
label_desc: Use image node_id 6 for calling the TestInterpPeriodic obj's underlying member method code with example usage: obj.test_periodic_points_exception(xp, scp) and returns: scp