Spaces:
Sleeping
Sleeping
Cleanup workspace
#2
by JonCard - opened
- flask_requirements.txt +0 -5
- gradio_requirements.txt +0 -5
- hf_gradio_ai_app.py +0 -157
- hf_streamlit_ai_app.py +0 -128
- localhost_ai_app.py +0 -97
- streamlit_requirements.txt +0 -4
flask_requirements.txt
DELETED
|
@@ -1,5 +0,0 @@
|
|
| 1 |
-
flask
|
| 2 |
-
langchain
|
| 3 |
-
openai
|
| 4 |
-
python-dotenv
|
| 5 |
-
langchain_openai
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
gradio_requirements.txt
DELETED
|
@@ -1,5 +0,0 @@
|
|
| 1 |
-
gradio==5.32.1
|
| 2 |
-
langchain
|
| 3 |
-
openai
|
| 4 |
-
python-dotenv
|
| 5 |
-
langchain_openai
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
hf_gradio_ai_app.py
DELETED
|
@@ -1,157 +0,0 @@
|
|
| 1 |
-
# gradio_ai_chatbot_dotenv.py
|
| 2 |
-
#
|
| 3 |
-
# To run this script:
|
| 4 |
-
# 1. Create a .env file in the same directory with your OPENAI_API_KEY.
|
| 5 |
-
# Example .env file content:
|
| 6 |
-
# OPENAI_API_KEY="sk-yourActualOpenAIapiKeyGoesHere"
|
| 7 |
-
# 2. Install the required packages:
|
| 8 |
-
# pip install gradio langchain openai langchain_openai python-dotenv
|
| 9 |
-
# 3. Run the script from your terminal:
|
| 10 |
-
# python gradio_ai_chatbot_dotenv.py
|
| 11 |
-
#
|
| 12 |
-
# The script will output a local URL and potentially a public Gradio link.
|
| 13 |
-
|
| 14 |
-
import gradio as gr
|
| 15 |
-
from langchain_openai import ChatOpenAI
|
| 16 |
-
from langchain.prompts import ChatPromptTemplate
|
| 17 |
-
import os
|
| 18 |
-
from dotenv import load_dotenv
|
| 19 |
-
|
| 20 |
-
# --- Load environment variables from .env file ---
|
| 21 |
-
load_dotenv()
|
| 22 |
-
|
| 23 |
-
# --- Global variables and Initial Setup ---
|
| 24 |
-
OPENAI_API_KEY_GLOBAL = os.getenv("OPENAI_API_KEY")
|
| 25 |
-
LANGCHAIN_LLM = None
|
| 26 |
-
LANGCHAIN_PROMPT_TEMPLATE = None
|
| 27 |
-
INITIAL_AI_SETUP_MESSAGE = "" # To store status/error from initial setup
|
| 28 |
-
|
| 29 |
-
def initialize_ai_components():
|
| 30 |
-
"""
|
| 31 |
-
Initializes LangChain components (LLM and prompt template) using the API key
|
| 32 |
-
from environment variables. Updates global variables and sets a status message.
|
| 33 |
-
"""
|
| 34 |
-
global LANGCHAIN_LLM, LANGCHAIN_PROMPT_TEMPLATE, OPENAI_API_KEY_GLOBAL, INITIAL_AI_SETUP_MESSAGE
|
| 35 |
-
|
| 36 |
-
if not OPENAI_API_KEY_GLOBAL:
|
| 37 |
-
INITIAL_AI_SETUP_MESSAGE = "<p style='color:red; font-weight:bold;'>ERROR: OpenAI API Key not found. Please ensure it's in your .env file or environment variables.</p>"
|
| 38 |
-
print("ERROR: OpenAI API Key not found. Make sure it's in your .env file or environment.")
|
| 39 |
-
return False # Indicate failure
|
| 40 |
-
|
| 41 |
-
try:
|
| 42 |
-
# Initialize the LangChain LLM (OpenAI model)
|
| 43 |
-
LANGCHAIN_LLM = ChatOpenAI(openai_api_key=OPENAI_API_KEY_GLOBAL, model_name="gpt-4o-mini")
|
| 44 |
-
|
| 45 |
-
# Define the prompt template for the LLM
|
| 46 |
-
prompt_template_str = """
|
| 47 |
-
You are a helpful, friendly, and insightful AI assistant.
|
| 48 |
-
Answer the user's question clearly, concisely, and in a conversational tone.
|
| 49 |
-
If you don't know the answer or a question is ambiguous, ask for clarification or state that you don't know.
|
| 50 |
-
|
| 51 |
-
User Question: {user_input}
|
| 52 |
-
|
| 53 |
-
AI Response:
|
| 54 |
-
"""
|
| 55 |
-
LANGCHAIN_PROMPT_TEMPLATE = ChatPromptTemplate.from_template(prompt_template_str)
|
| 56 |
-
|
| 57 |
-
INITIAL_AI_SETUP_MESSAGE = "<p style='color:green; font-weight:bold;'>AI Components Initialized Successfully! Ready to chat.</p>"
|
| 58 |
-
print("AI Components Initialized Successfully!")
|
| 59 |
-
return True # Indicate success
|
| 60 |
-
except Exception as e:
|
| 61 |
-
INITIAL_AI_SETUP_MESSAGE = f"<p style='color:red; font-weight:bold;'>ERROR: Failed to initialize AI components. Error: {str(e)}. Please check your API key and model access.</p>"
|
| 62 |
-
LANGCHAIN_LLM = None
|
| 63 |
-
LANGCHAIN_PROMPT_TEMPLATE = None
|
| 64 |
-
print(f"ERROR: Failed to initialize AI components: {str(e)}")
|
| 65 |
-
return False # Indicate failure
|
| 66 |
-
|
| 67 |
-
# --- Attempt to initialize AI components when the script loads ---
|
| 68 |
-
AI_INITIALIZED_SUCCESSFULLY = initialize_ai_components()
|
| 69 |
-
|
| 70 |
-
def ai_chat_response_function(user_message, chat_history):
|
| 71 |
-
"""
|
| 72 |
-
This is the core function called by Gradio's ChatInterface.
|
| 73 |
-
It takes the user's message and the chat history, and returns the AI's response string.
|
| 74 |
-
"""
|
| 75 |
-
if not AI_INITIALIZED_SUCCESSFULLY or not LANGCHAIN_LLM or not LANGCHAIN_PROMPT_TEMPLATE:
|
| 76 |
-
# Use the globally set error message from initialization
|
| 77 |
-
# Clean up HTML for plain error string if needed, or pass raw if Markdown supports it
|
| 78 |
-
error_msg_text = INITIAL_AI_SETUP_MESSAGE.replace("<p style='color:red; font-weight:bold;'>", "").replace("</p>", "")
|
| 79 |
-
return f"ERROR: AI is not ready. Status: {error_msg_text}"
|
| 80 |
-
|
| 81 |
-
# Proceed with generating response if components are ready
|
| 82 |
-
try:
|
| 83 |
-
# Create the LangChain chain (Prompt + LLM)
|
| 84 |
-
chain = LANGCHAIN_PROMPT_TEMPLATE | LANGCHAIN_LLM
|
| 85 |
-
|
| 86 |
-
# Invoke the chain with the user's input
|
| 87 |
-
ai_response = chain.invoke({"user_input": user_message})
|
| 88 |
-
|
| 89 |
-
# Return the content of the AI's response
|
| 90 |
-
return ai_response.content
|
| 91 |
-
except Exception as e:
|
| 92 |
-
print(f"Error during LangChain invocation: {e}") # Log for server-side debugging
|
| 93 |
-
return f"Sorry, an error occurred while trying to get a response: {str(e)}"
|
| 94 |
-
|
| 95 |
-
# --- Gradio Interface Definition using gr.Blocks for layout control ---
|
| 96 |
-
with gr.Blocks(theme=gr.themes.Soft(primary_hue=gr.themes.colors.blue, secondary_hue=gr.themes.colors.sky), title="AI Chatbot (Gradio)") as gradio_app:
|
| 97 |
-
gr.Markdown(
|
| 98 |
-
"""
|
| 99 |
-
# 🤖 G34: AI Chatbot with Gradio, LangChain & OpenAI
|
| 100 |
-
Powered by OpenAI's `gpt-4o-mini` model.
|
| 101 |
-
OpenAI API Key is loaded from your `.env` file.
|
| 102 |
-
"""
|
| 103 |
-
)
|
| 104 |
-
|
| 105 |
-
# Display the initial AI setup status
|
| 106 |
-
gr.Markdown(INITIAL_AI_SETUP_MESSAGE)
|
| 107 |
-
|
| 108 |
-
gr.Markdown("---") # Visual separator
|
| 109 |
-
gr.Markdown("## Chat Interface")
|
| 110 |
-
|
| 111 |
-
# Gradio ChatInterface for the main chat functionality
|
| 112 |
-
chat_interface_component = gr.ChatInterface(
|
| 113 |
-
fn=ai_chat_response_function, # The function that handles chat logic
|
| 114 |
-
chatbot=gr.Chatbot(
|
| 115 |
-
height=550,
|
| 116 |
-
show_label=False,
|
| 117 |
-
placeholder="AI's responses will appear here." if AI_INITIALIZED_SUCCESSFULLY else "AI is not available. Check setup status above.",
|
| 118 |
-
avatar_images=("https://raw.githubusercontent.com/svgmoji/svgmoji/main/packages/svgmoji__openmoji/svg/1F468-1F3FB-200D-1F9B0.svg", "https://raw.githubusercontent.com/gradio-app/gradio/main/gradio/icons/huggingface-logo.svg"),
|
| 119 |
-
type='messages'
|
| 120 |
-
),
|
| 121 |
-
textbox=gr.Textbox(
|
| 122 |
-
placeholder="Type your message here and press Enter...",
|
| 123 |
-
show_label=False,
|
| 124 |
-
scale=7,
|
| 125 |
-
# Disable textbox if AI did not initialize successfully
|
| 126 |
-
interactive=AI_INITIALIZED_SUCCESSFULLY
|
| 127 |
-
),
|
| 128 |
-
submit_btn="➡️ Send" if AI_INITIALIZED_SUCCESSFULLY else None, # Hide button if not ready
|
| 129 |
-
examples=[
|
| 130 |
-
"What is Paris, France known for?",
|
| 131 |
-
"Explain the concept of a Large Language Model (LLM) simply.",
|
| 132 |
-
"Can you give me a basic recipe for brownies?",
|
| 133 |
-
"Tell me an interesting fact about sunflowers."
|
| 134 |
-
] if AI_INITIALIZED_SUCCESSFULLY else None, # Only show examples if AI is ready
|
| 135 |
-
title=None,
|
| 136 |
-
autofocus=True
|
| 137 |
-
)
|
| 138 |
-
|
| 139 |
-
# If AI initialization failed, you might want to make the ChatInterface non-interactive.
|
| 140 |
-
# One way is to conditionally enable/disable components or hide buttons as done above.
|
| 141 |
-
if not AI_INITIALIZED_SUCCESSFULLY:
|
| 142 |
-
# Further disable parts of the chat interface if needed, though ChatInterface
|
| 143 |
-
# doesn't have a simple 'interactive=False' for the whole thing.
|
| 144 |
-
# Hiding buttons and disabling textbox is a good start.
|
| 145 |
-
# The error message in `ai_chat_response_function` will also prevent interaction.
|
| 146 |
-
pass
|
| 147 |
-
|
| 148 |
-
|
| 149 |
-
# --- Main execution block to launch the Gradio app ---
|
| 150 |
-
if __name__ == '__main__':
|
| 151 |
-
print("Attempting to launch Gradio App...")
|
| 152 |
-
if not OPENAI_API_KEY_GLOBAL:
|
| 153 |
-
print("WARNING: OpenAI API Key was not found in environment variables or .env file.")
|
| 154 |
-
print("The application UI will launch, but AI functionality will be disabled.")
|
| 155 |
-
print("Please create a .env file with your OPENAI_API_KEY.")
|
| 156 |
-
|
| 157 |
-
gradio_app.launch(share=True, debug=True)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
hf_streamlit_ai_app.py
DELETED
|
@@ -1,128 +0,0 @@
|
|
| 1 |
-
# Block 2: Create the Streamlit Application File (app.py)
|
| 2 |
-
import streamlit as st
|
| 3 |
-
from langchain_openai import ChatOpenAI
|
| 4 |
-
from langchain.prompts import ChatPromptTemplate
|
| 5 |
-
|
| 6 |
-
# --- Page Configuration ---
|
| 7 |
-
st.set_page_config(
|
| 8 |
-
page_title="AI Chat Assistant",
|
| 9 |
-
page_icon="🤖",
|
| 10 |
-
layout="wide",
|
| 11 |
-
initial_sidebar_state="expanded"
|
| 12 |
-
)
|
| 13 |
-
|
| 14 |
-
st.title("🤖 Streamlit AI Chat Assistant")
|
| 15 |
-
st.markdown("""
|
| 16 |
-
Welcome! Ask any question to the AI assistant. This application uses OpenAI's `gpt-4o-mini` model.
|
| 17 |
-
Enter your OpenAI API Key in the sidebar to begin.
|
| 18 |
-
""")
|
| 19 |
-
|
| 20 |
-
# --- API Key Handling ---
|
| 21 |
-
openai_api_key = None
|
| 22 |
-
|
| 23 |
-
# Attempt to get API key from st.secrets (for deployed apps)
|
| 24 |
-
try:
|
| 25 |
-
openai_api_key = st.secrets["OPENAI_API_KEY"]
|
| 26 |
-
if openai_api_key:
|
| 27 |
-
st.sidebar.success("API key loaded from st.secrets!")
|
| 28 |
-
else: # Handle case where secret exists but is empty
|
| 29 |
-
st.sidebar.warning("OpenAI API Key found in st.secrets but it's empty. Please provide a valid key.")
|
| 30 |
-
except (KeyError, FileNotFoundError): # FileNotFoundError for local st.secrets.toml if used
|
| 31 |
-
st.sidebar.info("OpenAI API Key not found in st.secrets. Please enter it below for this session.")
|
| 32 |
-
|
| 33 |
-
# Fallback to user input if not found in secrets or if secret was empty
|
| 34 |
-
if not openai_api_key:
|
| 35 |
-
openai_api_key_input = st.sidebar.text_input(
|
| 36 |
-
"Enter your OpenAI API Key:",
|
| 37 |
-
type="password",
|
| 38 |
-
key="api_key_input_sidebar",
|
| 39 |
-
help="Your API key is used only for this session and not stored."
|
| 40 |
-
)
|
| 41 |
-
if openai_api_key_input:
|
| 42 |
-
openai_api_key = openai_api_key_input
|
| 43 |
-
|
| 44 |
-
if not openai_api_key:
|
| 45 |
-
st.warning("Please provide your OpenAI API Key in the sidebar to use the chat.")
|
| 46 |
-
st.stop() # Stop execution if no API key is available
|
| 47 |
-
|
| 48 |
-
# --- LangChain Setup (Cached for efficiency) ---
|
| 49 |
-
@st.cache_resource # Caches the LLM and prompt template
|
| 50 |
-
def get_langchain_components(_api_key_for_cache): # Parameter ensures cache reacts to API key changes if necessary
|
| 51 |
-
"""Initializes and returns the LangChain LLM and prompt template."""
|
| 52 |
-
llm = ChatOpenAI(openai_api_key=_api_key_for_cache, model_name="gpt-4o-mini")
|
| 53 |
-
|
| 54 |
-
prompt_template_str = """
|
| 55 |
-
You are a knowledgeable and friendly AI assistant.
|
| 56 |
-
Your goal is to provide clear, concise, and helpful answers to the user's questions.
|
| 57 |
-
If you don't know the answer to a specific question, it's better to say so rather than inventing one.
|
| 58 |
-
|
| 59 |
-
User Question: {user_input}
|
| 60 |
-
|
| 61 |
-
AI Response:
|
| 62 |
-
"""
|
| 63 |
-
prompt = ChatPromptTemplate.from_template(prompt_template_str)
|
| 64 |
-
return llm, prompt
|
| 65 |
-
|
| 66 |
-
try:
|
| 67 |
-
llm, prompt_template = get_langchain_components(openai_api_key)
|
| 68 |
-
except Exception as e:
|
| 69 |
-
st.error(f"Failed to initialize AI components. Error: {e}. Check your API key and model access.")
|
| 70 |
-
st.stop()
|
| 71 |
-
|
| 72 |
-
# --- Initialize session state for storing chat messages ---
|
| 73 |
-
if "messages" not in st.session_state:
|
| 74 |
-
st.session_state.messages = []
|
| 75 |
-
|
| 76 |
-
# --- Display existing chat messages ---
|
| 77 |
-
for message in st.session_state.messages:
|
| 78 |
-
with st.chat_message(message["role"]):
|
| 79 |
-
st.markdown(message["content"])
|
| 80 |
-
|
| 81 |
-
# --- Chat Input and AI Response Logic ---
|
| 82 |
-
if user_query := st.chat_input("What would you like to ask?"):
|
| 83 |
-
# Add user message to session state and display it
|
| 84 |
-
st.session_state.messages.append({"role": "user", "content": user_query})
|
| 85 |
-
with st.chat_message("user"):
|
| 86 |
-
st.markdown(user_query)
|
| 87 |
-
|
| 88 |
-
# Get and display AI response
|
| 89 |
-
with st.chat_message("assistant"):
|
| 90 |
-
message_placeholder = st.empty() # For "Thinking..." message and then the actual response
|
| 91 |
-
with st.spinner("AI is thinking..."):
|
| 92 |
-
try:
|
| 93 |
-
chain = prompt_template | llm
|
| 94 |
-
ai_response_message = chain.invoke({"user_input": user_query})
|
| 95 |
-
ai_response_content = ai_response_message.content
|
| 96 |
-
|
| 97 |
-
message_placeholder.markdown(ai_response_content)
|
| 98 |
-
# Add AI response to session state
|
| 99 |
-
st.session_state.messages.append({"role": "assistant", "content": ai_response_content})
|
| 100 |
-
|
| 101 |
-
except Exception as e:
|
| 102 |
-
error_message = f"Sorry, I encountered an error: {str(e)}"
|
| 103 |
-
message_placeholder.error(error_message)
|
| 104 |
-
st.session_state.messages.append({"role": "assistant", "content": error_message})
|
| 105 |
-
|
| 106 |
-
# --- Sidebar Options ---
|
| 107 |
-
with st.sidebar:
|
| 108 |
-
st.divider()
|
| 109 |
-
if st.button("Clear Chat History", key="clear_chat"):
|
| 110 |
-
st.session_state.messages = []
|
| 111 |
-
st.success("Chat history cleared!")
|
| 112 |
-
st.rerun() # Rerun to update the UI immediately
|
| 113 |
-
|
| 114 |
-
st.markdown("---")
|
| 115 |
-
st.subheader("About")
|
| 116 |
-
st.info(
|
| 117 |
-
"This is a Streamlit application demonstrating an AI chat interface "
|
| 118 |
-
"using LangChain and OpenAI's gpt-4o-mini model."
|
| 119 |
-
)
|
| 120 |
-
|
| 121 |
-
|
| 122 |
-
# --- Block 3: Run the Streamlit Application ---
|
| 123 |
-
|
| 124 |
-
# To start your streamlit app, run the following command in your terminal:
|
| 125 |
-
|
| 126 |
-
# streamlit run hf_streamlit_ai_app.py
|
| 127 |
-
# Make sure you have the required packages installed:
|
| 128 |
-
# pip install streamlit langchain openai langchain_openai -q
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
localhost_ai_app.py
DELETED
|
@@ -1,97 +0,0 @@
|
|
| 1 |
-
# localhost_ai_app.py
|
| 2 |
-
|
| 3 |
-
# # Block 1: Set up dependencies
|
| 4 |
-
# On a local machine, you would typically run this in your terminal inside a virtual environment to install the necessary packages.
|
| 5 |
-
# \!pip install flask langchain openai python-dotenv langchain_openai -q -q -q
|
| 6 |
-
|
| 7 |
-
# # Block 2: Import Libraries and Configure API Key
|
| 8 |
-
|
| 9 |
-
# import the dependencies
|
| 10 |
-
import os
|
| 11 |
-
from flask import Flask, request, jsonify
|
| 12 |
-
from langchain_openai import ChatOpenAI
|
| 13 |
-
from langchain.prompts import ChatPromptTemplate
|
| 14 |
-
from dotenv import load_dotenv
|
| 15 |
-
|
| 16 |
-
# Load environment variables from .env file
|
| 17 |
-
load_dotenv()
|
| 18 |
-
|
| 19 |
-
# --- OpenAI API Key Configuration ---
|
| 20 |
-
# This relies on the OPENAI_API_KEY being set in your .env file
|
| 21 |
-
api_key = os.getenv("OPENAI_API_KEY")
|
| 22 |
-
|
| 23 |
-
# # Block 3: Define Prompt Template and Initialize LangChain with OpenAI
|
| 24 |
-
|
| 25 |
-
# Initialize the OpenAI LLM
|
| 26 |
-
# You can choose different models
|
| 27 |
-
# The script will fail here if api_key is None (i.e., not found in .env)
|
| 28 |
-
# OPENAI MODEL REFERENCE - (https://platform.openai.com/docs/models)
|
| 29 |
-
llm = ChatOpenAI(openai_api_key=api_key, model_name="gpt-4o-mini")
|
| 30 |
-
|
| 31 |
-
# Define the prompt template
|
| 32 |
-
# This template instructs the AI and includes a placeholder for user input.
|
| 33 |
-
prompt_template_str = """
|
| 34 |
-
You are a helpful AI assistant. Answer the user's question clearly and concisely.
|
| 35 |
-
|
| 36 |
-
User Question: {user_input}
|
| 37 |
-
|
| 38 |
-
AI Response:
|
| 39 |
-
"""
|
| 40 |
-
prompt_template = ChatPromptTemplate.from_template(prompt_template_str)
|
| 41 |
-
|
| 42 |
-
print("LangChain components initialized.")
|
| 43 |
-
|
| 44 |
-
# Block 4: Set up Flask Application and Implement Chat Endpoint
|
| 45 |
-
|
| 46 |
-
# --- Set up Flask Application ---
|
| 47 |
-
app = Flask(__name__)
|
| 48 |
-
print("Flask application created.")
|
| 49 |
-
|
| 50 |
-
@app.route('/chat', methods=['POST'])
|
| 51 |
-
def chat_endpoint():
|
| 52 |
-
try:
|
| 53 |
-
data = request.get_json()
|
| 54 |
-
if not data or 'user_input' not in data:
|
| 55 |
-
return jsonify({"error": "No user_input provided in JSON payload."}), 400
|
| 56 |
-
|
| 57 |
-
user_input = data['user_input']
|
| 58 |
-
|
| 59 |
-
# Create the LangChain chain (Prompt + LLM)
|
| 60 |
-
# LCEL (LangChain Expression Language) is used here
|
| 61 |
-
chain = prompt_template | llm
|
| 62 |
-
|
| 63 |
-
# Invoke the chain with the user's input
|
| 64 |
-
ai_response_message = chain.invoke({"user_input": user_input})
|
| 65 |
-
|
| 66 |
-
# The response from ChatOpenAI is an AIMessage object, access its content
|
| 67 |
-
ai_response_content = ai_response_message.content
|
| 68 |
-
|
| 69 |
-
return jsonify({"ai_response": ai_response_content})
|
| 70 |
-
|
| 71 |
-
except Exception as e:
|
| 72 |
-
# Log the error for debugging on the server side
|
| 73 |
-
print(f"Error processing request: {e}") # Basic logging
|
| 74 |
-
return jsonify({"error": "An error occurred while processing your request.", "details": str(e)}), 500
|
| 75 |
-
|
| 76 |
-
print("Flask /chat endpoint configured.")
|
| 77 |
-
|
| 78 |
-
# # Block 5: Run Locally (Start the Flask Server)
|
| 79 |
-
|
| 80 |
-
# Steps to run the Flask application:
|
| 81 |
-
# 1. Activate your virtual environment.
|
| 82 |
-
# 2. Enter "python3 localhost_ai_app.py" into your terminal.
|
| 83 |
-
# 3. In a new terminal, with your flask server running, enter "curl -X POST -H "Content-Type: application/json" -d '{"user_input":"Hello, AI! Whats the capital of Norway?"}' http://127.0.0.1:8000/chat"
|
| 84 |
-
|
| 85 |
-
# --- Run Flask Application ---
|
| 86 |
-
if __name__ == '__main__':
|
| 87 |
-
if not api_key:
|
| 88 |
-
print("--------------------------------------------------------------------")
|
| 89 |
-
print("ERROR: OpenAI API key not found.")
|
| 90 |
-
print("Please create a .env file in the same directory as this script with:")
|
| 91 |
-
print("OPENAI_API_KEY=\"your_openai_api_key_here\"")
|
| 92 |
-
print("--------------------------------------------------------------------")
|
| 93 |
-
else:
|
| 94 |
-
print("Starting Flask server...")
|
| 95 |
-
# host='0.0.0.0' makes it accessible from your network, not just localhost
|
| 96 |
-
# debug=True is useful for development, provides more error details
|
| 97 |
-
app.run(host='0.0.0.0', port=8000, debug=True)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
streamlit_requirements.txt
DELETED
|
@@ -1,4 +0,0 @@
|
|
| 1 |
-
streamlit
|
| 2 |
-
langchain
|
| 3 |
-
openai
|
| 4 |
-
langchain_openai
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|