database chat external user's api

controller.py

@@ -7,14 +7,14 @@ import threading
 import uuid
 from fastapi import FastAPI, HTTPException, Header
 from fastapi.encoders import jsonable_encoder
-from typing import Dict, List, Literal, Optional
+from typing import Dict, List, Optional
 from fastapi.responses import FileResponse
 import numpy as np
 import pandas as pd
 from pandasai import SmartDataframe
 from langchain_groq.chat_models import ChatGroq
 from dotenv import load_dotenv
-from pydantic import BaseModel, Field, ValidationError
+from pydantic import BaseModel, Field
 from csv_service import clean_data, extract_chart_filenames, generate_csv_data, get_csv_basic_info
 from urllib.parse import unquote
 from langchain_groq import ChatGroq
@@ -311,7 +311,6 @@ def langchain_csv_chat(csv_url: str, question: str, chart_required: bool):
             if current_langchain_key_index >= len(groq_api_keys):
                 current_langchain_key_index = 0
             api_key = groq_api_keys[current_langchain_key_index]
-            current_key = current_langchain_key_index
             current_langchain_key_index += 1
             attempts += 1