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app.py

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+import streamlit as st
+import os
+from langchain_openai import ChatOpenAI
+from langchain_openai import OpenAIEmbeddings
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain.chains.combine_documents import create_stuff_documents_chain
+from langchain_core.prompts import ChatPromptTemplate
+from langchain.chains import create_retrieval_chain
+from langchain_objectbox.vectorstores import ObjectBox
+from langchain_community.document_loaders import PyPDFDirectoryLoader
+
+from dotenv import load_dotenv
+load_dotenv()
+## load the Groq And OpenAI Api Key
+os.environ['OPEN_API_KEY']=os.getenv("OPENAI_API_KEY")
+groq_api_key=os.getenv('GROQ_API_KEY')
+
+st.title("Objectbox VectorstoreDB With Llama3 Demo")
+llm = ChatOpenAI(model="gpt-4o") ## Calling Gpt-4o
+prompt=ChatPromptTemplate.from_template(
+    """
+    Answer the questions based on the provided context only.
+    Please provide the most accurate response based on the question
+    <context>
+    {context}
+    <context>
+    Questions:{input}
+    """
+)
+
+## Vector Enbedding and Objectbox Vectorstore db
+def vector_embedding():
+    if "vectors" not in st.session_state:
+        st.session_state.embeddings=OpenAIEmbeddings()
+        st.session_state.loader=PyPDFDirectoryLoader("./us_census") ## Data Ingestion
+        st.session_state.docs=st.session_state.loader.load() ## Documents Loading
+        st.session_state.text_splitter=RecursiveCharacterTextSplitter(chunk_size=1000,chunk_overlap=200)
+        st.session_state.final_documents=st.session_state.text_splitter.split_documents(st.session_state.docs[:20])
+        st.session_state.vectors=ObjectBox.from_documents(st.session_state.final_documents,st.session_state.embeddings,embedding_dimensions=768)
+
+
+input_prompt=st.text_input("Enter Your Question From Documents")
+
+if st.button("Documents Embedding"):
+    vector_embedding()
+    st.write("ObjectBox Database is ready")
+
+import time
+if input_prompt:
+    document_chain=create_stuff_documents_chain(llm,prompt)
+    retriever=st.session_state.vectors.as_retriever()
+    retrieval_chain=create_retrieval_chain(retriever,document_chain)
+    start=time.process_time()
+
+    response=retrieval_chain.invoke({'input':input_prompt})
+
+    print("Response time :",time.process_time()-start)
+    st.write(response['answer'])
+
+    # With a streamlit expander
+    with st.expander("Document Similarity Search"):
+        # Find the relevant chunks
+        for i, doc in enumerate(response["context"]):
+            st.write(doc.page_content)
+            st.write("--------------------------------")

requirements.txt

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+langchain_openai 
+langchain_core
+python-dotenv
+streamlit
+langchain_community
+langserve
+fastapi
+uvicorn
+sse_starlette
+bs4
+pypdf
+chromadb
+faiss-cpu
+groq
+cassio
+beautifulsoup4
+langchain-groq
+wikipedia
+arxiv
+langchainhub
+sentence_transformers
+PyPDF2
+langchain-objectbox
+langchain