feat(main.py): support router.chat.completions.create

allows using router with instructor

https://github.com/BerriAI/litellm/issues/2673

litellm/main.py

@@ -116,27 +116,57 @@ class LiteLLM:
         default_headers: Optional[Mapping[str, str]] = None,
     ):
         self.params = locals()
-        self.chat = Chat(self.params)
+        self.chat = Chat(self.params, router_obj=None)
 
 
 class Chat:
-    def __init__(self, params):
+    def __init__(self, params, router_obj: Optional[Any]):
         self.params = params
-        self.completions = Completions(self.params)
+        if self.params.get("acompletion", False) == True:
+            self.params.pop("acompletion")
+            self.completions: Union[AsyncCompletions, Completions] = AsyncCompletions(
+                self.params, router_obj=router_obj
+            )
+        else:
+            self.completions = Completions(self.params, router_obj=router_obj)
 
 
 class Completions:
-    def __init__(self, params):
+    def __init__(self, params, router_obj: Optional[Any]):
         self.params = params
+        self.router_obj = router_obj
 
     def create(self, messages, model=None, **kwargs):
         for k, v in kwargs.items():
             self.params[k] = v
         model = model or self.params.get("model")
+        if self.router_obj is not None:
+            response = self.router_obj.completion(
+                model=model, messages=messages, **self.params
+            )
+        else:
             response = completion(model=model, messages=messages, **self.params)
         return response
 
 
+class AsyncCompletions:
+    def __init__(self, params, router_obj: Optional[Any]):
+        self.params = params
+        self.router_obj = router_obj
+
+    async def create(self, messages, model=None, **kwargs):
+        for k, v in kwargs.items():
+            self.params[k] = v
+        model = model or self.params.get("model")
+        if self.router_obj is not None:
+            response = await self.router_obj.acompletion(
+                model=model, messages=messages, **self.params
+            )
+        else:
+            response = await acompletion(model=model, messages=messages, **self.params)
+        return response
+
+
 @client
 async def acompletion(
     model: str,

litellm/router.py

@@ -230,7 +230,7 @@ class Router:
         )  # dict to store aliases for router, ex. {"gpt-4": "gpt-3.5-turbo"}, all requests with gpt-4 -> get routed to gpt-3.5-turbo group
 
         # make Router.chat.completions.create compatible for openai.chat.completions.create
-        self.chat = litellm.Chat(params=default_litellm_params)
+        self.chat = litellm.Chat(params=default_litellm_params, router_obj=self)
 
         # default litellm args
         self.default_litellm_params = default_litellm_params

litellm/tests/test_class.py

@@ -4,6 +4,7 @@
 # import sys, os
 # import traceback
 # import pytest
+
 # sys.path.insert(
 #     0, os.path.abspath("../..")
 # )  # Adds the parent directory to the system path
@@ -16,51 +17,68 @@
 # from pydantic import BaseModel
 
 # # This enables response_model keyword
-# # # from client.chat.completions.create
-# # client = instructor.patch(Router(model_list=[{
-# #     "model_name": "gpt-3.5-turbo", # openai model name
-# #     "litellm_params": { # params for litellm completion/embedding call
-# #         "model": "azure/chatgpt-v-2",
-# #         "api_key": os.getenv("AZURE_API_KEY"),
-# #         "api_version": os.getenv("AZURE_API_VERSION"),
-# #         "api_base": os.getenv("AZURE_API_BASE")
-# #     }
-# # }]))
-
-# # class UserDetail(BaseModel):
-# #     name: str
-# #     age: int
-
-# # user = client.chat.completions.create(
-# #     model="gpt-3.5-turbo",
-# #     response_model=UserDetail,
-# #     messages=[
-# #         {"role": "user", "content": "Extract Jason is 25 years old"},
-# #     ]
-# # )
-# # assert isinstance(model, UserExtract)
-
-# # assert isinstance(user, UserDetail)
-# # assert user.name == "Jason"
-# # assert user.age == 25
-
-# # print(f"user: {user}")
-# import instructor
-# from openai import AsyncOpenAI
-
-# aclient = instructor.apatch(Router(model_list=[{
+# # from client.chat.completions.create
+# client = instructor.patch(
+#     Router(
+#         model_list=[
+#             {
 #                 "model_name": "gpt-3.5-turbo",  # openai model name
 #                 "litellm_params": {  # params for litellm completion/embedding call
 #                     "model": "azure/chatgpt-v-2",
 #                     "api_key": os.getenv("AZURE_API_KEY"),
 #                     "api_version": os.getenv("AZURE_API_VERSION"),
-#         "api_base": os.getenv("AZURE_API_BASE")
+#                     "api_base": os.getenv("AZURE_API_BASE"),
+#                 },
 #             }
-# }], default_litellm_params={"acompletion": True}))
+#         ]
+#     )
+# )
+
+
+# class UserDetail(BaseModel):
+#     name: str
+#     age: int
+
+
+# user = client.chat.completions.create(
+#     model="gpt-3.5-turbo",
+#     response_model=UserDetail,
+#     messages=[
+#         {"role": "user", "content": "Extract Jason is 25 years old"},
+#     ],
+# )
+
+# assert isinstance(user, UserDetail)
+# assert user.name == "Jason"
+# assert user.age == 25
+
+# print(f"user: {user}")
+# # import instructor
+# # from openai import AsyncOpenAI
+
+# aclient = instructor.apatch(
+#     Router(
+#         model_list=[
+#             {
+#                 "model_name": "gpt-3.5-turbo",  # openai model name
+#                 "litellm_params": {  # params for litellm completion/embedding call
+#                     "model": "azure/chatgpt-v-2",
+#                     "api_key": os.getenv("AZURE_API_KEY"),
+#                     "api_version": os.getenv("AZURE_API_VERSION"),
+#                     "api_base": os.getenv("AZURE_API_BASE"),
+#                 },
+#             }
+#         ],
+#         default_litellm_params={"acompletion": True},
+#     )
+# )
+
 
 # class UserExtract(BaseModel):
 #     name: str
 #     age: int
+
+
 # async def main():
 #     model = await aclient.chat.completions.create(
 #         model="gpt-3.5-turbo",
@@ -71,4 +89,5 @@
 #     )
 #     print(f"model: {model}")
 
+
 # asyncio.run(main())