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 +1,24 @@
+from prml.nn.tensor.tensor import Tensor
+
+
+class Parameter(Tensor):
+    """
+    parameter to be optimized
+    """
+
+    def __init__(self, value, prior=None):
+        super().__init__(value, function=None)
+        self.grad = None
+        self.prior = prior
+
+    def _backward(self, delta, **kwargs):
+        if self.grad is None:
+            self.grad = delta
+        else:
+            self.grad += delta
+
+    def cleargrad(self):
+        self.grad = None
+        if self.prior is not None:
+            loss = -self.prior.log_pdf(self).sum()
+            loss.backward()