refactor(langflow): organize imports in multiple files

This commit organizes imports in multiple files to follow PEP8 guidelines
and improve code readability. No functionality changes were made.

src/backend/langflow/api/chat.py

@@ -1,8 +1,7 @@
-from fastapi import APIRouter, WebSocket
+from fastapi import APIRouter, WebSocket, WebSocketDisconnect, WebSocketException, status
 
 from langflow.api.chat_manager import ChatManager
 from langflow.utils.logger import logger
-from fastapi import status, WebSocketDisconnect, WebSocketException
 
 router = APIRouter()
 chat_manager = ChatManager()

src/backend/langflow/api/chat_manager.py

@@ -5,7 +5,6 @@ from typing import Dict, List
 
 from fastapi import WebSocket
 
-
 from langflow.api.schemas import ChatMessage, ChatResponse, FileResponse
 from langflow.cache import cache_manager
 from langflow.cache.manager import Subject

src/backend/langflow/api/endpoints.py

@@ -3,14 +3,14 @@ from typing import Any, Dict
 
 from fastapi import APIRouter, HTTPException
 
-from langflow.interface.run import process_graph_cached
-from langflow.interface.types import build_langchain_types_dict
 from langflow.api.schemas import (
     ExportedFlow,
     GraphData,
     PredictRequest,
     PredictResponse,
 )
+from langflow.interface.run import process_graph_cached
+from langflow.interface.types import build_langchain_types_dict
 
 # build router
 router = APIRouter()

src/backend/langflow/api/schemas.py

@@ -1,4 +1,4 @@
-from typing import Any, Union, Dict, List
+from typing import Any, Dict, List, Union
 
 from pydantic import BaseModel, validator
 

src/backend/langflow/interface/agents/custom.py

@@ -27,7 +27,6 @@ from langchain.agents.agent_toolkits.vectorstore.prompt import (
 from langchain.agents.mrkl.prompt import FORMAT_INSTRUCTIONS
 from langchain.agents.mrkl.prompt import FORMAT_INSTRUCTIONS as SQL_FORMAT_INSTRUCTIONS
 from langchain.base_language import BaseLanguageModel
-
 from langchain.memory.chat_memory import BaseChatMemory
 from langchain.sql_database import SQLDatabase
 from langchain.tools.python.tool import PythonAstREPLTool

src/backend/langflow/interface/importing/utils.py

@@ -5,9 +5,9 @@ from typing import Any, Type
 
 from langchain import PromptTemplate
 from langchain.agents import Agent
+from langchain.base_language import BaseLanguageModel
 from langchain.chains.base import Chain
 from langchain.chat_models.base import BaseChatModel
-from langchain.base_language import BaseLanguageModel
 from langchain.tools import BaseTool
 
 

src/backend/langflow/interface/run.py

@@ -3,8 +3,8 @@ import io
 from typing import Any, Dict
 
 from chromadb.errors import NotEnoughElementsException
-from langflow.api.callback import AsyncStreamingLLMCallbackHandler, StreamingLLMCallbackHandler  # type: ignore
 
+from langflow.api.callback import AsyncStreamingLLMCallbackHandler, StreamingLLMCallbackHandler  # type: ignore
 from langflow.cache.base import compute_dict_hash, load_cache, memoize_dict
 from langflow.graph.graph import Graph
 from langflow.interface import loading