app.py

# Import dependencies
import os
import gradio as gr
from llama_index import GPTVectorStoreIndex
from langchain.prompts.prompt import PromptTemplate
from langchain.llms import OpenAI
from langchain.chains import ChatVectorDBChain

# from query_data import get_chain
# from response import get_response

_template = """Given the following conversation and a follow up question, rephrase the follow up question to be a standalone question.
Chat History:
{chat_history}
Follow Up Input: {question}
Standalone question:"""
CONDENSE_QUESTION_PROMPT = PromptTemplate.from_template(_template)

template = """You are an AI psychotherapist for answering questions about various mental health conditions. 
You are given the following extracted parts of a long document and a question. Provide a conversational answer.
If you don't know the answer, just say "Hmm, I'm not sure." Don't try to make up an answer.
If the question is not about mental health or resources , politely inform them that you are tuned to only answer questions about mental health 
and well being."""

Question: {question}

class ChatWrapper:

    def __call__(
        self, inp: str, history: str, chain
    ):

          
# Execute the chat functionality.           
        output = chain({"question": inp, "chat_history": history})["answer"]        
        history.append((inp, output))     
        return history

chat = ChatWrapper()
chatbot = gr.Chatbot()

block = gr.Blocks(css=".gradio-container {background-color: lightblue}")

with block:
    gr.HTML("<center><h2>Omdena AI Chatbot For Mental Health and Well Being</h2></center>")
    
    gr.HTML("WELCOME<br>"
            "I am an AI ChatBot and I am here to assist you with whatever is bothering you. "
            "Our conversation is strictly confidential and I will not remember it when you come back another time."     
        )
        
    with gr.Row():
        message = gr.Textbox(
            label="What would you like to talk about?",
            type = "text",
        )

    with gr.Row():
        submit = gr.Button(value="Send", variant="secondary").style(full_width=False)
        submit.click(chat, inputs=[message], outputs=[chat])
    
    gr.Examples(
        examples=[
            "I feel lonely",
            "I'm having problems at home",
            "I am looking for some resources",
                 ],
        inputs=message,
    ) 


block.launch(debug=True)