Create rl.py

unsloth/models/rl.py

@@ -0,0 +1,39 @@
+# Copyright 2023-present Daniel Han-Chen & the Unsloth team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+__all__ = [
+    "patch_rl",
+]
+
+from trl.models.utils import unwrap_model_for_generation
+from contextlib import contextmanager
+
+
+def patch_rl(FastLanguageModel):
+    @contextmanager
+    def unsloth_unwrap_model_for_generation(model, *args, **kwargs):
+        FastLanguageModel.for_inference(model)
+        yield unwrap_model_for_generation(model, *args, **kwargs)
+        FastLanguageModel.for_training (model)
+    pass
+
+    import trl.trainer
+    trainers = dir(trl.trainer)
+    trainers = [x for x in trainers if x.endswith("_trainer")]
+    unwrap = "unwrap_model_for_generation"
+    for trainer in trainers:
+        if hasattr(eval(f"trl.trainer.{trainer}"), unwrap):
+            exec(f"trl.trainer.{trainer}.{unwrap} = unsloth_{unwrap}")
+    pass
+pass