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src/llmfactory/extras/packages.py

+import importlib.metadata
+import importlib.util
+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")
+
+
+def is_fastapi_available():
+    return _is_package_available("fastapi")
+
+
+def is_flash_attn2_available():
+    return _is_package_available("flash_attn") and _get_package_version("flash_attn") > version.parse("2.0.0")
+
+
+def is_galore_available():
+    return _is_package_available("galore_torch")
+
+
+def is_gradio_available():
+    return _is_package_available("gradio")
+
+
+def is_jieba_available():
+    return _is_package_available("jieba")
+
+
+def is_matplotlib_available():
+    return _is_package_available("matplotlib")
+
+
+def is_nltk_available():
+    return _is_package_available("nltk")
+
+
+def is_pillow_available():
+    return _is_package_available("PIL")
+
+
+def is_requests_available():
+    return _is_package_available("requests")
+
+
+def is_rouge_available():
+    return _is_package_available("rouge_chinese")
+
+
+def is_sdpa_available():
+    return _get_package_version("torch") > version.parse("2.1.1")
+
+
+def is_starlette_available():
+    return _is_package_available("sse_starlette")
+
+
+def is_uvicorn_available():
+    return _is_package_available("uvicorn")
+
+
+def is_vllm_available():
+    return _is_package_available("vllm")