wehub-resource-sync
26 lines
579 B
Python
Executable File
26 lines
579 B
Python
Executable File
import unittest
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import numpy as np
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from prml import nn
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class TestSubtract(unittest.TestCase):
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def test_forward_backward(self):
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x = nn.Parameter(2)
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z = x - 5
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self.assertEqual(z.value, -3)
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z.backward()
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self.assertEqual(x.grad, 1)
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x = np.random.rand(5, 4)
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y = np.random.rand(4)
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p = nn.Parameter(y)
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z = x - p
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self.assertTrue((z.value == x - y).all())
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z.backward(np.ones((5, 4)))
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self.assertTrue((p.grad == -np.ones(4) * 5).all())
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if __name__ == '__main__':
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unittest.main()
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