Initial commit

verl/workers/critic/base.py

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+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+#
+# 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.
+"""
+Base class for a critic
+"""
+from abc import ABC, abstractmethod
+
+import torch
+
+from verl import DataProto
+
+__all__ = ['BasePPOCritic']
+
+
+class BasePPOCritic(ABC):
+
+    def __init__(self, config):
+        super().__init__()
+        self.config = config
+
+    @abstractmethod
+    def compute_values(self, data: DataProto) -> torch.Tensor:
+        """Compute values"""
+        pass
+
+    @abstractmethod
+    def update_critic(self, data: DataProto):
+        """Update the critic"""
+        pass