fireworks[patch]: Fix fireworks async stream (#18372)

- **Description:**  Fix the async stream issue with Fireworks
- **Dependencies:** fireworks >= 0.13.0

```
tests/integration_tests/test_chat_models.py ..........                                                                   [ 45%]
tests/integration_tests/test_compile.py .                                                                                [ 50%]
tests/integration_tests/test_embeddings.py ..                                                                            [ 59%]
tests/integration_tests/test_llms.py .........                                                                           [100%]
```
```
tests/unit_tests/test_embeddings.py .                                                                                    [ 16%]
tests/unit_tests/test_imports.py .                                                                                       [ 33%]
tests/unit_tests/test_llms.py ....                                                                                       [100%]
```

---------

Co-authored-by: Erick Friis <erick@langchain.dev>

libs/partners/fireworks/Makefile

@@ -5,11 +5,9 @@ all: help
 
 # Define a variable for the test file path.
 TEST_FILE ?= tests/unit_tests/
+integration_test integration_tests: TEST_FILE ?= tests/integration_tests/
 
-test:
-	poetry run pytest $(TEST_FILE)
-
-tests:
+test tests integration_test integration_tests:
 	poetry run pytest $(TEST_FILE)
 
 

libs/partners/fireworks/langchain_fireworks/chat_models.py

@@ -7,8 +7,10 @@ import os
 from operator import itemgetter
 from typing import (
     Any,
+    AsyncIterator,
     Callable,
     Dict,
+    Iterator,
     List,
     Literal,
     Mapping,
@@ -24,11 +26,13 @@ from typing import (
 from fireworks.client import AsyncFireworks, Fireworks  # type: ignore
 from langchain_core._api import beta
 from langchain_core.callbacks import (
+    AsyncCallbackManagerForLLMRun,
     CallbackManagerForLLMRun,
 )
 from langchain_core.language_models import LanguageModelInput
 from langchain_core.language_models.chat_models import (
     BaseChatModel,
+    agenerate_from_stream,
     generate_from_stream,
 )
 from langchain_core.messages import (
@@ -53,7 +57,7 @@ from langchain_core.output_parsers.openai_tools import (
     JsonOutputKeyToolsParser,
     PydanticToolsParser,
 )
-from langchain_core.outputs import ChatGeneration, ChatResult
+from langchain_core.outputs import ChatGeneration, ChatGenerationChunk, ChatResult
 from langchain_core.pydantic_v1 import BaseModel, Field, SecretStr, root_validator
 from langchain_core.runnables import Runnable, RunnableMap, RunnablePassthrough
 from langchain_core.tools import BaseTool
@@ -344,6 +348,40 @@ class ChatFireworks(BaseChatModel):
             combined["system_fingerprint"] = system_fingerprint
         return combined
 
+    def _stream(
+        self,
+        messages: List[BaseMessage],
+        stop: Optional[List[str]] = None,
+        run_manager: Optional[CallbackManagerForLLMRun] = None,
+        **kwargs: Any,
+    ) -> Iterator[ChatGenerationChunk]:
+        message_dicts, params = self._create_message_dicts(messages, stop)
+        params = {**params, **kwargs, "stream": True}
+
+        default_chunk_class = AIMessageChunk
+        for chunk in self.client.create(messages=message_dicts, **params):
+            if not isinstance(chunk, dict):
+                chunk = chunk.dict()
+            if len(chunk["choices"]) == 0:
+                continue
+            choice = chunk["choices"][0]
+            chunk = _convert_delta_to_message_chunk(
+                choice["delta"], default_chunk_class
+            )
+            generation_info = {}
+            if finish_reason := choice.get("finish_reason"):
+                generation_info["finish_reason"] = finish_reason
+            logprobs = choice.get("logprobs")
+            if logprobs:
+                generation_info["logprobs"] = logprobs
+            default_chunk_class = chunk.__class__
+            chunk = ChatGenerationChunk(
+                message=chunk, generation_info=generation_info or None
+            )
+            if run_manager:
+                run_manager.on_llm_new_token(chunk.text, chunk=chunk, logprobs=logprobs)
+            yield chunk
+
     def _generate(
         self,
         messages: List[BaseMessage],
@@ -400,6 +438,66 @@ class ChatFireworks(BaseChatModel):
         }
         return ChatResult(generations=generations, llm_output=llm_output)
 
+    async def _astream(
+        self,
+        messages: List[BaseMessage],
+        stop: Optional[List[str]] = None,
+        run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
+        **kwargs: Any,
+    ) -> AsyncIterator[ChatGenerationChunk]:
+        message_dicts, params = self._create_message_dicts(messages, stop)
+        params = {**params, **kwargs, "stream": True}
+
+        default_chunk_class = AIMessageChunk
+        async for chunk in self.async_client.acreate(messages=message_dicts, **params):
+            if not isinstance(chunk, dict):
+                chunk = chunk.dict()
+            if len(chunk["choices"]) == 0:
+                continue
+            choice = chunk["choices"][0]
+            chunk = _convert_delta_to_message_chunk(
+                choice["delta"], default_chunk_class
+            )
+            generation_info = {}
+            if finish_reason := choice.get("finish_reason"):
+                generation_info["finish_reason"] = finish_reason
+            logprobs = choice.get("logprobs")
+            if logprobs:
+                generation_info["logprobs"] = logprobs
+            default_chunk_class = chunk.__class__
+            chunk = ChatGenerationChunk(
+                message=chunk, generation_info=generation_info or None
+            )
+            if run_manager:
+                await run_manager.on_llm_new_token(
+                    token=chunk.text, chunk=chunk, logprobs=logprobs
+                )
+            yield chunk
+
+    async def _agenerate(
+        self,
+        messages: List[BaseMessage],
+        stop: Optional[List[str]] = None,
+        run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
+        stream: Optional[bool] = None,
+        **kwargs: Any,
+    ) -> ChatResult:
+        should_stream = stream if stream is not None else self.streaming
+        if should_stream:
+            stream_iter = self._astream(
+                messages, stop=stop, run_manager=run_manager, **kwargs
+            )
+            return await agenerate_from_stream(stream_iter)
+
+        message_dicts, params = self._create_message_dicts(messages, stop)
+        params = {
+            **params,
+            **({"stream": stream} if stream is not None else {}),
+            **kwargs,
+        }
+        response = await self.async_client.acreate(messages=message_dicts, **params)
+        return self._create_chat_result(response)
+
     @property
     def _identifying_params(self) -> Dict[str, Any]:
         """Get the identifying parameters."""

libs/partners/fireworks/langchain_fireworks/llms.py

@@ -213,10 +213,5 @@ class Fireworks(LLM):
                     )
 
                 response_json = await response.json()
-
-                if response_json.get("status") != "finished":
-                    err_msg = response_json.get("error", "Undefined Error")
-                    raise Exception(err_msg)
-
                 output = self._format_output(response_json)
                 return output

libs/partners/fireworks/poetry.lock

@@ -341,13 +341,13 @@ test = ["pytest (>=6)"]
 
 [[package]]
 name = "fireworks-ai"
-version = "0.12.1"
+version = "0.13.0"
 description = "Python client library for the Fireworks.ai Generative AI Platform"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "fireworks-ai-0.12.1.tar.gz", hash = "sha256:77a3b3be243182548cb5f690f60528f09ca2a7223b871e47fc4e9d13a0df5c1b"},
-    {file = "fireworks_ai-0.12.1-py3-none-any.whl", hash = "sha256:f78dc61f46c534ba045ad111fc7eeed6ea7ff022e7dce446dd23f56ebad371e7"},
+    {file = "fireworks-ai-0.13.0.tar.gz", hash = "sha256:d6db1e60f65f237b6e87e3e9c028681be0ba77496df398db386ae2876dab54e0"},
+    {file = "fireworks_ai-0.13.0-py3-none-any.whl", hash = "sha256:900559d7eeea8a86dc5789f9034b3873684a685a2e96b56a63e6be3a04803eb6"},
 ]
 
 [package.dependencies]
@@ -1149,13 +1149,13 @@ watchdog = ">=2.0.0"
 
 [[package]]
 name = "python-dateutil"
-version = "2.8.2"
+version = "2.9.0"
 description = "Extensions to the standard Python datetime module"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
 files = [
-    {file = "python-dateutil-2.8.2.tar.gz", hash = "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86"},
-    {file = "python_dateutil-2.8.2-py2.py3-none-any.whl", hash = "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"},
+    {file = "python-dateutil-2.9.0.tar.gz", hash = "sha256:78e73e19c63f5b20ffa567001531680d939dc042bf7850431877645523c66709"},
+    {file = "python_dateutil-2.9.0-py2.py3-none-any.whl", hash = "sha256:cbf2f1da5e6083ac2fbfd4da39a25f34312230110440f424a14c7558bb85d82e"},
 ]
 
 [package.dependencies]
@@ -1538,4 +1538,4 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8.1,<4.0"
-content-hash = "b9ee2bfb5053127cb29b8182baea395897744d7b5e8b985c42863133a26708ba"
+content-hash = "ab5538b63e5d347dadcad268e135a5ca9fb5bc2edd2436dcee99c55a7ee4b609"

libs/partners/fireworks/pyproject.toml

@@ -13,7 +13,7 @@ license = "MIT"
 [tool.poetry.dependencies]
 python = ">=3.8.1,<4.0"
 langchain-core = "^0.1.27"
-fireworks-ai = ">=0.12.0,<1"
+fireworks-ai = ">=0.13.0"
 openai = "^1.10.0"
 requests = "^2"
 aiohttp = "^3.9.1"