add llm API (#19)

* add llm API

* refine llm API

python/llm/__init__.py

@@ -1,2 +1,21 @@
-from .embedding_model import HuEmbedding
-from .chat_model import GptTurbo
+import os
+from .embedding_model import *
+from .chat_model import *
+from .cv_model import *
+
+EmbeddingModel = None
+ChatModel = None
+CvModel = None
+
+
+if os.environ.get("OPENAI_API_KEY"):
+    EmbeddingModel = GptEmbed()
+    ChatModel = GptTurbo()
+    CvModel = GptV4()
+
+elif os.environ.get("DASHSCOPE_API_KEY"):
+    EmbeddingModel = QWenEmbd()
+    ChatModel = QWenChat()
+    CvModel = QWenCV()
+else:
+    EmbeddingModel = HuEmbedding()