feat: models() 支持作为 class method (#606)

* models() support as classmethod

* fix lint

* fix lint

python/qianfan/resources/llm/base.py

@@ -179,7 +179,20 @@ def access_token(self) -> str:
         """
         return self._real.access_token()
 
-    def models(self) -> Set[str]:
+    @utils.class_or_instancemethod
+    def models(
+        self_or_cls,
+        /,
+        version: Optional[Literal["1", "2", 1, 2]] = None,
+        *args: Any,
+        **kwargs: Any,
+    ) -> Set[str]:
+        if version is not None:
+            return self_or_cls._real_base(str(version)).models()
+        if isinstance(self_or_cls, type):
+            cls = self_or_cls
+            return cls._real_base(version="1").models()
+        self = self_or_cls
         return self._real.models()
 
     def get_model_info(self, model: str) -> QfLLMInfo:

python/qianfan/utils/utils.py

@@ -239,3 +239,9 @@ def get_ip_address() -> str:
             return "127.0.0.1"
 
         return s.getsockname()[0]  # type: ignore
+
+
+class class_or_instancemethod(classmethod):
+    def __get__(self, instance: _T, type_: Optional[Type[_T]] = None, /) -> Callable:
+        descr_get = super().__get__ if instance is None else self.__func__.__get__
+        return descr_get(instance, type_)