[v1] add cli sampler (#9721)

src/llamafactory/v1/utils/helper.py

@@ -0,0 +1,29 @@
+# Copyright 2025 the LlamaFactory team.
+#
+# 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.
+
+from transformers import PreTrainedTokenizer
+
+from .types import Processor
+
+
+def get_tokenizer(processor: Processor) -> PreTrainedTokenizer:
+    """Get tokenizer from processor.
+
+    Args:
+        processor: Processor.
+
+    Returns:
+        Tokenizer.
+    """
+    return processor.tokenizer if hasattr(processor, "tokenizer") else processor