Update app.py

app.py

@@ -8,7 +8,8 @@ import json
 from typing import Dict, List, Tuple, Optional
 
 # LangChain imports for conversational AI
-from langchain.memory import ConversationBufferMemory
+from langchain.chains import ConversationChain  # Replaced ConversationBufferMemory with ConversationChain
+from langchain.prompts import PromptTemplate
 from langchain.schema import HumanMessage, AIMessage, SystemMessage
 from langchain_openai import ChatOpenAI
 
@@ -16,8 +17,8 @@ from langchain_openai import ChatOpenAI
 from index_calculator import IndexCalculator
 from data_sources import RealTimeIndexCalculator, IndianStockAPI, GlobalStockAPI
 
-# Initialize memory for conversation context
-memory = ConversationBufferMemory(return_messages=True)
+# Initialize memory for conversation context using ConversationChain (if ConversationBufferMemory is not found)
+memory = ConversationChain(memory_type="buffer", return_messages=True)  # Adjusted for compatibility
 
 # System prompt for the AI assistant
 SYSTEM_PROMPT = """You are an expert financial analyst specializing in index numbers and real-time market data.