enhancement: introduce Ruff for Python linter for reordering and removing unused imports with automated pre-commit and sytle check (#2366)

api/core/callback_handler/agent_loop_gather_callback_handler.py

@@ -3,6 +3,10 @@ import logging
 import time
 from typing import Any, Dict, List, Optional, Union, cast
 
+from langchain.agents import openai_functions_agent, openai_functions_multi_agent
+from langchain.callbacks.base import BaseCallbackHandler
+from langchain.schema import AgentAction, AgentFinish, BaseMessage, LLMResult
+
 from core.application_queue_manager import ApplicationQueueManager, PublishFrom
 from core.callback_handler.entity.agent_loop import AgentLoop
 from core.entities.application_entities import ModelConfigEntity
@@ -10,9 +14,6 @@ from core.model_runtime.entities.llm_entities import LLMResult as RuntimeLLMResu
 from core.model_runtime.entities.message_entities import AssistantPromptMessage, PromptMessage, UserPromptMessage
 from core.model_runtime.model_providers.__base.large_language_model import LargeLanguageModel
 from extensions.ext_database import db
-from langchain.agents import openai_functions_agent, openai_functions_multi_agent
-from langchain.callbacks.base import BaseCallbackHandler
-from langchain.schema import AgentAction, AgentFinish, BaseMessage, ChatGeneration, LLMResult
 from models.model import Message, MessageAgentThought, MessageChain
 
 

api/core/callback_handler/index_tool_callback_handler.py

@@ -1,9 +1,10 @@
-from typing import List, Union
+from typing import List
+
+from langchain.schema import Document
 
 from core.application_queue_manager import ApplicationQueueManager, PublishFrom
 from core.entities.application_entities import InvokeFrom
 from extensions.ext_database import db
-from langchain.schema import Document
 from models.dataset import DatasetQuery, DocumentSegment
 from models.model import DatasetRetrieverResource