I am done

rl/Lib/site-packages/onnx/bin/__init__.py

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+# Copyright (c) ONNX Project Contributors
+#
+# SPDX-License-Identifier: Apache-2.0

rl/Lib/site-packages/onnx/bin/checker.py

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+# Copyright (c) ONNX Project Contributors
+#
+# SPDX-License-Identifier: Apache-2.0
+from __future__ import annotations
+
+import argparse
+
+from onnx import NodeProto, checker, load
+
+
+def check_model() -> None:
+    parser = argparse.ArgumentParser("check-model")
+    parser.add_argument("model_pb", type=argparse.FileType("rb"))
+    args = parser.parse_args()
+
+    model = load(args.model_pb)
+    checker.check_model(model)
+
+
+def check_node() -> None:
+    parser = argparse.ArgumentParser("check-node")
+    parser.add_argument("node_pb", type=argparse.FileType("rb"))
+    args = parser.parse_args()
+
+    node = NodeProto()
+    node.ParseFromString(args.node_pb.read())
+    checker.check_node(node)