Update app.py

app.py

@@ -1,3 +1,21 @@
+import subprocess
+import sys
+
+# Function to install a package
+def install_package(package):
+    subprocess.check_call([sys.executable, "-m", "pip", "install", package])
+
+# Install required packages if they are not already installed
+required_packages = [
+    "PyPDF2", "streamlit", "langchain", "faiss-cpu", 
+    "sentence-transformers", "python-dotenv"
+]
+for package in required_packages:
+    try:
+        __import__(package)
+    except ImportError:
+        install_package(package)
+
 import os
 import streamlit as st
 from dotenv import load_dotenv
@@ -41,7 +59,7 @@ def get_vectorstore(text_chunks):
 
 def get_conversation_chain(vectorstore):
     # Fetch the HuggingFace API token from environment variable
-    api_token = os.getenv("HUGGINGFACE_API_TOKEN ")
+    api_token = os.getenv("HUGGINGFACE_API_TOKEN")
     if not api_token:
         st.error("HuggingFace API token not found. Please ensure it is set in the environment variables.")
         return None