Upload app.py

app.py

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+import streamlit as st
+from llama_index.core import StorageContext, load_index_from_storage, VectorStoreIndex, SimpleDirectoryReader, ChatPromptTemplate
+from llama_index.llms.huggingface import HuggingFaceInferenceAPI
+from dotenv import load_dotenv
+from llama_index.embeddings.huggingface import HuggingFaceEmbedding
+from llama_index.core import Settings
+import os
+import base64
+import docx2txt
+
+# Load environment variables
+load_dotenv()
+
+icons = {"assistant": "robot.png", "user": "man-kddi.png"}
+
+# Configure the Llama index settings
+Settings.llm = HuggingFaceInferenceAPI(
+    model_name="meta-llama/Meta-Llama-3-8B-Instruct",
+    tokenizer_name="meta-llama/Meta-Llama-3-8B-Instruct",
+    context_window=3900,
+    token=os.getenv("HF_TOKEN"),
+    max_new_tokens=1000,
+    generate_kwargs={"temperature": 0.5},
+)
+Settings.embed_model = HuggingFaceEmbedding(
+    model_name="BAAI/bge-small-en-v1.5"
+)
+
+# Define the directory for persistent storage and data
+PERSIST_DIR = "./db"
+DATA_DIR = "data"
+
+# Ensure data directory exists
+os.makedirs(DATA_DIR, exist_ok=True)
+os.makedirs(PERSIST_DIR, exist_ok=True)
+
+def displayPDF(file):
+    with open(file, "rb") as f:
+        base64_pdf = base64.b64encode(f.read()).decode('utf-8')
+    pdf_display = f'<iframe src="data:application/pdf;base64,{base64_pdf}" width="100%" height="600" type="application/pdf"></iframe>'
+    st.markdown(pdf_display, unsafe_allow_html=True)
+
+def displayDOCX(file):
+    text = docx2txt.process(file)
+    st.text_area("Document Content", text, height=400)
+
+def displayTXT(file):
+    with open(file, "r") as f:
+        text = f.read()
+    st.text_area("Document Content", text, height=400)
+
+def data_ingestion():
+    documents = SimpleDirectoryReader(DATA_DIR).load_data()
+    storage_context = StorageContext.from_defaults()
+    index = VectorStoreIndex.from_documents(documents)
+    index.storage_context.persist(persist_dir=PERSIST_DIR)
+
+def handle_query(query):
+    storage_context = StorageContext.from_defaults(persist_dir=PERSIST_DIR)
+    index = load_index_from_storage(storage_context)
+    chat_text_qa_msgs = [
+        (
+            "user",
+            """You are Q&A assistant named CHAT-DOC. Your main goal is to provide answers as accurately as possible, based on the instructions and context you have been given. If a question does not match the provided context or is outside the scope of the document, kindly advise the user to ask questions within the context of the document.
+            Context:
+            {context_str}
+            Question:
+            {query_str}
+            """
+        )
+    ]
+    text_qa_template = ChatPromptTemplate.from_messages(chat_text_qa_msgs)
+    query_engine = index.as_query_engine(text_qa_template=text_qa_template)
+    answer = query_engine.query(query)
+    
+    if hasattr(answer, 'response'):
+        return answer.response
+    elif isinstance(answer, dict) and 'response' in answer:
+        return answer['response']
+    else:
+        return "Sorry, I couldn't find an answer."
+
+# Streamlit app initialization
+st.title("Chat with your Document 📄")
+st.markdown("Chat here👇")
+
+if 'messages' not in st.session_state:
+    st.session_state.messages = [{'role': 'assistant', "content": 'Hello! Upload a PDF, DOCX, or TXT file and ask me anything about its content.'}]
+
+for message in st.session_state.messages:
+    with st.chat_message(message['role'], avatar=icons[message['role']]):
+        st.write(message['content'])
+
+with st.sidebar:
+    st.title("Menu:")
+    uploaded_file = st.file_uploader("Upload your document (PDF, DOCX, TXT)", type=["pdf", "docx", "txt"])
+    if st.button("Submit & Process") and uploaded_file:
+        with st.spinner("Processing..."):
+            file_extension = os.path.splitext(uploaded_file.name)[1].lower()
+            filepath = os.path.join(DATA_DIR, "uploaded_file" + file_extension)
+            with open(filepath, "wb") as f:
+                f.write(uploaded_file.getbuffer())
+            
+            if file_extension == ".pdf":
+                displayPDF(filepath)
+            elif file_extension == ".docx":
+                displayDOCX(filepath)
+            elif file_extension == ".txt":
+                displayTXT(filepath)
+            
+            data_ingestion()  # Process file every time a new file is uploaded
+            st.success("Done")
+
+user_prompt = st.chat_input("Ask me anything about the content of the document:")
+
+if user_prompt and uploaded_file:
+    st.session_state.messages.append({'role': 'user', "content": user_prompt})
+    with st.chat_message("user", avatar=icons["user"]):
+        st.write(user_prompt)
+
+    # Trigger assistant's response retrieval and update UI
+    with st.spinner("Thinking..."):
+        response = handle_query(user_prompt)
+        with st.chat_message("assistant", avatar=icons["assistant"]):
+            st.write(response)
+        st.session_state.messages.append({'role': 'assistant', "content": response})