code: def test_numpy_dtypes(self):
      for dtype in (numpy.float16, numpy.float32, numpy.float64):
          with chainer.using_config("dtype", dtype):
              self.assertEqual(chainer.get_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 1 for calling the TestDtype obj's underlying member method code with example usage: obj.test_numpy_dtypes() without return types