Update app.py

app.py

@@ -1,6 +1,7 @@
 import streamlit as st
 import pandas as pd
 import os
+from dotenv import load_dotenv
 from llama_index.readers.file.paged_csv.base import PagedCSVReader
 from llama_index.core import Settings, VectorStoreIndex
 from llama_index.llms.openai import OpenAI
@@ -17,6 +18,7 @@ import faiss
 import tempfile
 
 # Load environment variables
+load_dotenv()
 os.environ["OPENAI_API_KEY"] = os.getenv("OPENAI_API_KEY")
 
 # Global settings for LlamaIndex
@@ -36,10 +38,11 @@ if uploaded_file:
         st.write("Preview of uploaded data:")
         st.dataframe(data)
 
-        # Save the uploaded file to a temporary location
-        with tempfile.NamedTemporaryFile(delete=False, suffix=".csv", mode="w") as temp_file:
+        # Clean and save the file to a temporary location
+        with tempfile.NamedTemporaryFile(delete=False, suffix=".csv", mode="w", encoding="utf-8") as temp_file:
             temp_file_path = temp_file.name
-            data.to_csv(temp_file_path, index=False)
+            data.to_csv(temp_file.name, index=False, encoding="utf-8")
+            temp_file.flush()  # Ensure data is written
 
         # Tabs for LangChain and LlamaIndex
         tab1, tab2 = st.tabs(["LangChain", "LlamaIndex"])