code: def test_ptp_axis_large(self, xp, dtype):
      a = testing.shaped_random((3, 1000), xp, dtype)
      return xp.ptp(a, axis=0)
  
imports: import warnings
  import numpy
  import pytest
  import cupy
  import cupy._core._accelerator
  from cupy import cuda
  from cupy import testing
label_desc: Use image node_id 16 for calling the TestOrder obj's underlying member method code with example usage: obj.test_ptp_axis_large(xp, dtype) and returns: xp