Update app.py

app.py

@@ -4,24 +4,20 @@ import io
 import pandas as pd
 import plotly.express as px
 import plotly.graph_objects as go
-from dash import Dash, html, dcc, Input, Output, State
+from dash import Dash, html, dcc, Input, Output, State, callback_context
 import dash_bootstrap_components as dbc
 
-# Langchain imports
-from langchain.llms import HuggingFacePipeline
-from langchain.embeddings import HuggingFaceEmbeddings
-from langchain.vectorstores import FAISS
+# Fixed Langchain imports (using langchain-community)
+from langchain_community.embeddings import HuggingFaceEmbeddings
+from langchain_community.vectorstores import FAISS
 from langchain.text_splitter import RecursiveCharacterTextSplitter
-from langchain.chains import RetrievalQA
-from langchain.document_loaders import CSVLoader, DataFrameLoader
 from langchain.schema import Document
 
 # Initialize Dash app
 app = Dash(__name__, external_stylesheets=[dbc.themes.BOOTSTRAP])
 server = app.server
 
-# Initialize Langchain components
-@st.cache_resource
+# Initialize Langchain components (removed @st.cache_resource)
 def init_langchain():
     """Initialize Langchain components"""
     try: