[v1] add accelerator (#9607)

src/llamafactory/v1/utils/packages.py

@@ -0,0 +1,43 @@
+# Copyright 2025 HuggingFace Inc. and the LlamaFactory team.
+#
+# This code is inspired by the HuggingFace's transformers library.
+# https://github.com/huggingface/transformers/blob/v4.40.0/src/transformers/utils/import_utils.py
+#
+# 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.
+
+import importlib.metadata
+import importlib.util
+from functools import lru_cache
+from typing import TYPE_CHECKING
+
+from packaging import version
+
+
+if TYPE_CHECKING:
+    from packaging.version import Version
+
+
+def _is_package_available(name: str) -> bool:
+    return importlib.util.find_spec(name) is not None
+
+
+def _get_package_version(name: str) -> "Version":
+    try:
+        return version.parse(importlib.metadata.version(name))
+    except Exception:
+        return version.parse("0.0.0")
+
+
+@lru_cache
+def is_transformers_version_greater_than(content: str):
+    return _get_package_version("transformers") >= version.parse(content)