Update app.py

app.py

@@ -1,104 +0,0 @@
-import streamlit as st
-from pathlib import Path
-from langchain.agents import create_sql_agent
-from langchain.sql_database import SQLDatabase
-from langchain.agents.agent_types import AgentType
-from langchain.callbacks import StreamlitCallbackHandler
-from langchain_community.agent_toolkits.sql.toolkit import SQLDatabaseToolkit
-from sqlalchemy import create_engine
-import sqlite3
-from langchain_groq import ChatGroq
-
-st.set_page_config(page_title="LangChain: Chat with SQL DB", page_icon="🦜")
-st.title("🦜 LangChain: Chat with SQL DB")
-
-LOCALDB = "USE_LOCALDB"
-MYSQL = "USE_MYSQL"
-
-radio_opt = ["Use SQLLite 3 Database- STUDENT.db", "Connect to you MySQL Database"]
-selected_opt = st.sidebar.radio(label="Choose the DB which you want to chat", options=radio_opt)
-
-if radio_opt.index(selected_opt) == 1:
-    db_uri = MYSQL
-    mysql_host = st.sidebar.text_input("Provide MySQL Host")
-    mysql_user = st.sidebar.text_input("MYSQL User")
-    mysql_password = st.sidebar.text_input("MYSQL password (leave blank if no password)", type="password")
-    mysql_db = st.sidebar.text_input("MySQL database")
-else:
-    db_uri = LOCALDB
-
-# Get API key from user input
-api_key = st.sidebar.text_input(label="GROQ API Key", type="password")
-
-if not api_key:
-    st.info("Please add the Groq API key to continue")
-    st.stop()
-
-if db_uri == MYSQL and not all([mysql_host, mysql_user, mysql_db]):
-    st.info("Please enter all required MySQL database information")
-    st.stop()
-
-# LLM model - using user-provided API key
-llm = ChatGroq(groq_api_key=api_key, model_name="llama-3.1-8b-instant", streaming=True)
-
-@st.cache_resource(ttl="2h")
-def configure_db(db_uri, mysql_host=None, mysql_user=None, mysql_password=None, mysql_db=None):
-    if db_uri == LOCALDB:
-        dbfilepath = (Path(__file__).parent/"STUDENT.db").absolute()
-        print(dbfilepath)
-        creator = lambda: sqlite3.connect(f"file:{dbfilepath}?mode=ro", uri=True)
-        return SQLDatabase(create_engine("sqlite:///", creator=creator))
-    elif db_uri == MYSQL:
-        if not (mysql_host and mysql_user and mysql_db):
-            st.error("Please provide MySQL host, user, and database name.")
-            st.stop()
-                
-        # Handle optional password
-        if mysql_password:
-            connection_string = f"mysql+mysqlconnector://{mysql_user}:{mysql_password}@{mysql_host}/{mysql_db}"
-        else:
-            connection_string = f"mysql+mysqlconnector://{mysql_user}@{mysql_host}/{mysql_db}"
-                
-        return SQLDatabase(create_engine(connection_string))
-
-# Configure database
-try:
-    if db_uri == MYSQL:
-        db = configure_db(db_uri, mysql_host, mysql_user, mysql_password, mysql_db)
-    else:
-        db = configure_db(db_uri)
-except Exception as e:
-    st.error(f"Error connecting to database: {str(e)}")
-    st.stop()
-
-# Toolkit
-toolkit = SQLDatabaseToolkit(db=db, llm=llm)
-agent = create_sql_agent(
-    llm=llm,
-    toolkit=toolkit,
-    verbose=True,
-    agent_type=AgentType.ZERO_SHOT_REACT_DESCRIPTION
-)
-
-if "messages" not in st.session_state or st.sidebar.button("Clear message history"):
-    st.session_state["messages"] = [{"role": "assistant", "content": "How can I help you?"}]
-
-for msg in st.session_state.messages:
-    st.chat_message(msg["role"]).write(msg["content"])
-
-user_query = st.chat_input(placeholder="Ask anything from the database")
-
-if user_query:
-    st.session_state.messages.append({"role": "user", "content": user_query})
-    st.chat_message("user").write(user_query)
-        
-    with st.chat_message("assistant"):
-        try:
-            streamlit_callback = StreamlitCallbackHandler(st.container())
-            response = agent.run(user_query, callbacks=[streamlit_callback])
-            st.session_state.messages.append({"role": "assistant", "content": response})
-            st.write(response)
-        except Exception as e:
-            error_message = f"An error occurred: {str(e)}"
-            st.error(error_message)
-            st.session_state.messages.append({"role": "assistant", "content": error_message})