code: def test_from_array(self):
      arr = intel64.ideep.array(numpy.ndarray((2,), numpy.float32))
      # Test precondition check
      assert isinstance(arr, intel64.mdarray)
  
      expected_device = backend.Intel64Device()
  
      device = backend.Intel64Device.from_array(arr)
      self.check_device(device)
      assert device == expected_device
  
      device = backend.get_device_from_array(arr)
      self.check_device(device)
      assert device == expected_device
  
file_path: chainer/tests/chainer_tests/backends_tests/test_intel64.py
imports: import unittest
  import numpy
  from chainer import backend
  from chainer.backends import intel64
  from chainer import testing
label_desc: Use image node_id 3 for calling the TestIntel64Device obj's underlying member method code with example usage: obj.test_from_array() without return types