[CI] Fix windows wheels

.github/workflows/build-wheels-windows.yml

@@ -32,18 +32,22 @@ jobs:
       matrix:
         include:
           - repository: pytorch/tensordict
+            pre-script: ""
+            env-script: .github/scripts/version_script.bat
             post-script: "python packaging/wheel/relocate.py"
             smoke-test-script: test/smoke_test.py
             package-name: tensordict
-    name: pytorch/tensordict
+    name: ${{ matrix.repository }}
     uses: pytorch/test-infra/.github/workflows/build_wheels_windows.yml@main
     with:
       repository: ${{ matrix.repository }}
       ref: ""
       test-infra-repository: pytorch/test-infra
       test-infra-ref: main
       build-matrix: ${{ needs.generate-matrix.outputs.matrix }}
+      pre-script: ${{ matrix.pre-script }}
+      env-script: ${{ matrix.env-script }}
+      post-script: ${{ matrix.post-script }}
       package-name: ${{ matrix.package-name }}
       smoke-test-script: ${{ matrix.smoke-test-script }}
       trigger-event: ${{ github.event_name }}
-      env-script: .github/scripts/version_script.bat

.github/workflows/wheels-windows.yml

@@ -36,12 +36,12 @@ jobs:
             python3 -mpip install wheel
             TENSORDICT_BUILD_VERSION=0.5.0 python3 setup.py bdist_wheel
       - name: Upload wheel for the test-wheel job
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: tensordict-win-${{ matrix.python_version[0] }}.whl
           path: dist/tensordict-*.whl
       - name: Upload wheel for download
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: tensordict-batch.whl
           path: dist/*.whl
@@ -72,7 +72,7 @@ jobs:
         run: |
           python3 -mpip install numpy pytest pytest-cov codecov unittest-xml-reporting pillow>=4.1.1 scipy av networkx expecttest pyyaml
       - name: Download built wheels
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v3
         with:
           name: tensordict-win-${{ matrix.python_version }}.whl
           path: wheels

tensordict/base.py

@@ -1495,6 +1495,16 @@ def grad(self):
         """Returns a tensordict containing the .grad attributes of the leaf tensors."""
         return self._grad()
 
+    @grad.setter
+    def grad(self, grad):
+        def set_grad(x, grad):
+            if x.grad is None:
+                x.grad = grad
+            else:
+                x.grad.copy_(grad)
+
+        self._fast_apply(set_grad, grad)
+
     def zero_grad(self, set_to_none: bool = True) -> T:
         """Zeros all the gradients of the TensorDict recursively.