chore: import upstream snapshot with attribution

2026-07-13 13:30:25 +08:00
commit f19b2512d7
562 changed files with 38082 additions and 0 deletions
@@ -0,0 +1,26 @@
+import unittest
+import numpy as np
+from prml import nn
+
+
+class TestDivide(unittest.TestCase):
+
+    def test_divide(self):
+        x = nn.Parameter(10.)
+        z = x / 2
+        self.assertEqual(z.value, 5)
+        z.backward()
+        self.assertEqual(x.grad, 0.5)
+
+        x = np.random.rand(5, 10, 3)
+        y = np.random.rand(10, 1)
+        p = nn.Parameter(y)
+        z = x / p
+        self.assertTrue((z.value == x / y).all())
+        z.backward(np.ones((5, 10, 3)))
+        d = np.sum(-x / y ** 2, axis=0).sum(axis=1, keepdims=True)
+        self.assertTrue((p.grad == d).all())
+
+
+if __name__ == '__main__':
+    unittest.main()