code: def test_specified_dtype(self):
      with chainer.using_config("dtype", numpy.float64):
          dtype = numpy.float16
          self.assertEqual(chainer.get_dtype(dtype), numpy.dtype(dtype))
  
file_path: chainer/tests/chainer_tests/test_init.py
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestDtype obj's underlying member method code with example usage: obj.test_specified_dtype() without return types