Add set and add TensorVariable methods for set_subtensor and `i…

…nc_subtensor` operations

pytensor/tensor/variable.py

@@ -815,6 +815,32 @@ def compress(self, a, axis=None):
         """Return selected slices only."""
         return at.extra_ops.compress(self, a, axis=axis)
 
+    def set(self, y, **kwargs):
+        """Set values to y, where y is the output of an index operation.
+
+        Equivalent to set_subtensor(self, y). See docstrings for kwargs.
+
+        Examples
+        --------
+
+        >>> x = matrix()
+        >>> out = x[0].set(5)
+        """
+        return at.subtensor.set_subtensor(self, y, **kwargs)
+
+    def add(self, y, **kwargs):
+        """Add values to y, where y is the output of an index operation.
+
+        Equivalent to inc_subtensor(self, y). See docstrings for kwargs
+
+        Examples
+        --------
+
+        >>> x = matrix()
+        >>> out = x[0].add(5)
+        """
+        return at.inc_subtensor(self, y, **kwargs)
+
 
 class TensorVariable(
     _tensor_py_operators, Variable[_TensorTypeType, OptionalApplyType]

tests/tensor/test_variable.py

@@ -14,7 +14,12 @@
 from pytensor.tensor.elemwise import DimShuffle
 from pytensor.tensor.math import dot, eq, matmul
 from pytensor.tensor.shape import Shape
-from pytensor.tensor.subtensor import AdvancedSubtensor, Subtensor
+from pytensor.tensor.subtensor import (
+    AdvancedSubtensor,
+    Subtensor,
+    inc_subtensor,
+    set_subtensor,
+)
 from pytensor.tensor.type import (
     TensorType,
     cscalar,
@@ -428,6 +433,20 @@ def test_take(self):
         # Test equivalent advanced indexing
         assert_array_equal(X[:, indices].eval({X: x}), x[:, indices])
 
+    def test_set_add(self):
+        x = matrix("x")
+        idx = [0]
+        y = 5
+
+        assert equal_computations([x[idx].set(y)], [set_subtensor(x[idx], y)])
+        assert equal_computations([x[idx].add(y)], [inc_subtensor(x[idx], y)])
+
+        msg = "must be the result of a subtensor operation"
+        with pytest.raises(TypeError, match=msg):
+            x.set(y)
+        with pytest.raises(TypeError, match=msg):
+            x.add(y)
+
 
 def test_deprecated_import():
     with pytest.warns(