code: def check_initializer(self, w):
      initializer = self.target(
          interpolation=self.interpolation, dtype=self.dtype
      )
      initializer(w)
      if self.target == initializers.UpsamplingDeconvFilter:
          w_sum = ((numpy.array(self.shape[2:]) + 1) // 2).prod()
          w_sum = w_sum * self.shape[0]
          self.assertAlmostEqual(cuda.to_cpu(w).sum(), w_sum)
      else:
          self.assertAlmostEqual(
              cuda.to_cpu(w).sum(), 1.0 * self.shape[0]
          )
      self.assertTupleEqual(w.shape, self.shape)
      self.assertEqual(w.dtype, self.dtype)
  
file_path: chainer/tests/chainer_tests/initializer_tests/test_sampling.py
imports: import unittest
  import numpy
  from chainer.backends import cuda
  from chainer import initializers
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 1 for calling the TestUpsamplingDeconvFilter obj's underlying member method code with example usage: obj.check_initializer(w) without return types