code: def test_putmask(self, xp, dtype):
      a = testing.shaped_random(self.shape, xp, dtype=dtype, seed=3)
      mask = testing.shaped_random(
          self.shape, xp, dtype=numpy.bool_, seed=4
      )
      values = testing.shaped_random(
          self.values_shape, xp, dtype=dtype, seed=5
      )
      ret = xp.putmask(a, mask, values)
      assert ret is None
      return a
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestPutmaskDifferentShapes obj's underlying member method code with example usage: obj.test_putmask(xp, dtype) and returns: a