I am done

rl/Lib/site-packages/onnx/reference/ops/op_expand.py

@@ -0,0 +1,18 @@
+# Copyright (c) ONNX Project Contributors
+
+# SPDX-License-Identifier: Apache-2.0
+from __future__ import annotations
+
+import numpy as np
+
+from onnx.reference.op_run import OpRun
+
+
+def common_reference_implementation(data: np.ndarray, shape: np.ndarray) -> np.ndarray:
+    ones = np.ones(shape, dtype=data.dtype)
+    return data * ones  # type: ignore
+
+
+class Expand(OpRun):
+    def _run(self, data, shape):  # type: ignore
+        return (common_reference_implementation(data, shape),)