app.py

#from transformers import AutoModelForCausalLM, AutoTokenizer

from langchain.chat_models import ChatOpenAI
from langchain.chains import ConversationChain
from langchain.chains.conversation.memory import ConversationBufferWindowMemory
from langchain.prompts import PromptTemplate

import streamlit as st
from streamlit_chat import message
from PIL import Image

st.title("Nexus TCM Chatbot")
#query = st.text_input("Query: ", key="input")

#https://discuss.streamlit.io/t/clear-input-box-after-hitting-enter/33824/2
#https://discuss.streamlit.io/t/how-do-you-clear-the-input-box-after-hitting-enter/45691/4
#https://stackoverflow.com/questions/77093266/how-to-clear-input-field-after-hitting-enter-in-streamlit
if "my_text" not in st.session_state:
    st.session_state.my_text = ""

def submit():
    st.session_state.my_text = st.session_state.widget
    st.session_state.widget = ""

st.text_input("Enter text here", key="widget", on_change=submit)

query = st.session_state.my_text

#st.write(query)

# Set the logo URL
#logo_url = "https://huggingface.co/spaces/mathslearn/chatbot_test_streamlit/blob/main/logo.jpeg"
logo_url = "https://huggingface.co/spaces/mathslearn/chatbot_test_streamlit/resolve/main/logo.jpeg"

# Set the desired logo height
logo_height = 25

# Display the logo with adjusted column width
#st.image(logo_url, caption="Nexus TCM Chatbot Logo", use_column_width=True)
#st.image(logo_url, use_column_width=True)
st.sidebar.image(logo_url, caption="Disclaimer: The chatbot is not a substitute for medical advice from a qualified healthcare professional.", use_column_width=True)

if 'responses' not in st.session_state:
    st.session_state['responses'] = []

if 'requests' not in st.session_state:
    st.session_state['requests'] = []

#REPO_ID = "Xenova/gpt-3.5-turbo"

# Load the model and tokenizer from Hugging Face's model hub
#model = AutoModelForCausalLM.from_pretrained(REPO_ID)
#tokenizer = AutoTokenizer.from_pretrained(REPO_ID)

#llm = ChatOpenAI(model=model, tokenizer=tokenizer)

llm = ChatOpenAI(model_name="gpt-3.5-turbo", openai_api_key="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")

# Initialize global variable for conversation memory
if 'buffer_memory' not in st.session_state:
    st.session_state.buffer_memory= ConversationBufferWindowMemory(k=8)
    #st.session_state.buffer_memory= ConversationBufferWindowMemory(k=3)

conversation = ConversationChain(
    llm=llm,
    memory=st.session_state.buffer_memory,
    verbose=True
)

context = """ 
You act as a chatbot to interact with users on their questions about traditional chinese medicine (TCM). \
Welcome the user in a friendly way.
You respond in a short and friendly style. \
For each text, mark NER tags. \
Tag categories: location, product. \
Text: I want to visit a clinic in [Ang Mo Kio](location). \
If a user says he/she wants to visit a traditional chinese medicine (TCM) clinic, \
ask for which location he/she wants to visit. \
After user replies with location, show in chat window the Google Map from this link \
https://www.google.com/maps/search/tcm+clinics+at+location+name \
For example, if a user wants to visit a clinic in Ang Mo Kio, \
show in chat window the Google Map from this link \
https://www.google.com/maps/search/tcm+clinics+at+ang+mo+kio \
Examoples of location names:
North:
Sembawang
Woodlands
Yishun
North-East:
Ang Mo Kio
Hougang
Punggol
Sengkang
Serangoon
East:
Bedok
Pasir Ris
Tampines
West:
Bukit Batok
Bukit Panjang
Choa Chu Kang
Clementi
Jurong East
Jurong West
Tengah
Central:
Bishan
Bukit Merah
Bukit Timah
Central Area
Geylang
Kallang
Whampoa
Marine Parade
Queenstown
Toa Payoh
For each text, mark NER tags. \
Tag categories: location, product. \
Text: I want to buy/get [Po Chai Pills](product). \
If a user wants to buy/get a product, suggest that \
he/she can consider buying/getting from https://www.amazon.sg/s?k=product+name \
For example, if a user wants to buy Po Chai Pills, suggest \
he/she can consider buying/getting from https://www.amazon.sg/s?k=po+chai+pills \
Examples of product names:
Ointment/Hong You/Feng You/Fengyou
Liquorice/Gan cao/Gancao
Chrysanthemum/Ju hua/Juhua
Goji berry/wolfberry/Gou Qi Zi/Gouqizi
Red dates/Jujubes/Hong Zao/Hongzao
"""

prompt_template = PromptTemplate.from_template(
    '''system role :{context} \
        user:{query}\
        assistance: 
        ''')

# Define Streamlit Interface
if query:
    formatquery= prompt_template.format(context=context, query=query)
    response = conversation.run(formatquery)
    st.session_state.requests.append(query)
    st.session_state.responses.append(response)

if st.session_state['responses']:

    for i in range(len(st.session_state['responses'])-1, -1, -1):
        message(st.session_state['requests'][i], is_user=True, key=str(i) + '_user')
        message(st.session_state["responses"][i], key=str(i))

# gr.load("models/ksh-nyp/llama-2-7b-chat-TCMKB").launch()