[API Compatibility] support device.func = place.func (PaddlePaddle#78350)

* device.func = place.func

Author:    fanxiangyu <fxyfxy777@163.com>
Date:      Wed Mar 18 17:22:11 2026 +0800

* device.func = place.func

Author:    fanxiangyu <fxyfxy777@163.com>
Date:      Wed Mar 18 17:22:11 2026 +0800

* fix ut error on mac

Author: fxyfxy777

python/paddle/device/__init__.py

@@ -2206,6 +2206,9 @@ def __exit__(self, exc_type, exc_val, exc_tb):
         previous_device = Device._DEFAULT_DEVICE_STACK.pop()
         paddle.set_device(previous_device)
 
+    def __getattr__(self, name: str):
+        return getattr(self._to_place(), name)
+
 
 class _DeviceModule(types.ModuleType):
     """A callable package module: paddle.device(...) -> Device(...)"""

test/legacy_test/test_paddle_device.py

@@ -104,6 +104,24 @@ def test_invalid_type(self):
         with self.assertRaises(ValueError):
             Device("abc:0")
 
+    def test_getattr_forward_to_place(self):
+        # Test that unknown attributes are forwarded to paddle.Place
+        d_cpu = Device("cpu")
+        self.assertTrue(d_cpu.is_cpu_place())
+        self.assertFalse(d_cpu.is_gpu_place())
+        self.assertFalse(d_cpu.is_xpu_place())
+
+        # Test CUDA device methods
+        if paddle.device.is_available() and paddle.is_compiled_with_cuda():
+            d_cuda = Device("cuda:0")
+            self.assertFalse(d_cuda.is_cpu_place())
+            self.assertTrue(d_cuda.is_gpu_place())
+            self.assertEqual(d_cuda.gpu_device_id(), 0)
+
+            d_gpu = Device("gpu:0")
+            self.assertTrue(d_gpu.is_gpu_place())
+            self.assertEqual(d_gpu.gpu_device_id(), 0)
+
 
 if __name__ == "__main__":
     unittest.main()