app.py

import gradio as gr
import random
#from huggingface_hub import InferenceClient
#import spaces
import os


os.environ["KERAS_BACKEND"] =  "tensorflow"  #"jax" "torch"
os.environ["XLA_PYTHON_CLIENT_MEM_FRACTION"]="1.00"

import keras_hub


models = [
    "hf://tatihden/gemma_mental_health_2b_it_en",
    "hf://tatihden/gemma_mental_health_2b_en",
    "hf://tatihden/gemma_mental_health_7b_it_en"
]

clients = []
for model in models:
    clients.append(keras_hub.models.GemmaCausalLM.from_preset(model))

#from huggingface_hub import InferenceClient


#clients = []
#for model in models:
    #clients.append(InferenceClient(model))

#@spaces.GPU
def format_prompt(message, history):
    prompt = ""
    if history:
        for user_prompt, bot_response in history:
            prompt += f"<start_of_turn>user{user_prompt}<end_of_turn>"
            #prompt += f"<start_of_turn>model{bot_response}"
    prompt += f"<start_of_turn>user{message}<end_of_turn><start_of_turn>model"
    return prompt


def chat_inf(system_prompt, prompt, history, client_choice, seed, temp, tokens, top_p, rep_p):
    client = clients[int(client_choice) - 1]
    if not history:
        history = []
        hist_len = 0
    if history:
        hist_len = len(history)
        print(hist_len)

    #generate_kwargs = dict(
        #temperature=temp,
        #max_new_tokens=tokens,
        #top_p=top_p,
        #repetition_penalty=rep_p,
        #do_sample=True,
        #seed=seed,
    #)
    formatted_prompt = format_prompt(f"{system_prompt}, {prompt}", history)
    stream = client.generate(formatted_prompt)
    output = ""

    for response in stream:
        output+= response
    history.append((prompt, output))
    yield history


def clear_fn():
    return None


rand_val = random.randint(1, 1111111111111111)


def check_rand(inp, val):
    if inp is True:
        return gr.Slider(label="Seed", minimum=1, maximum=1111111111111111, value=random.randint(1, 1111111111111111))
    else:
        return gr.Slider(label="Seed", minimum=1, maximum=1111111111111111, value=int(val))


with gr.Blocks(theme=gr.themes.Soft(),css=".gradio-container {background-color: rgb(187 247 208)}") as app:
    gr.HTML(
        """<center><h1 style='font-size:xx-large;'>CalmChat:A mental Health Conversational Agent</h1></center>""")
    with gr.Group():
        with gr.Row():
            client_choice = gr.Dropdown(label="Models", type='index', choices=[c for c in models], value=models[0],
                                        interactive=True)
    chat_b = gr.Chatbot(height=500)
    with gr.Group():
        with gr.Row():
            with gr.Column(scale=1):
                with gr.Group():
                    rand = gr.Checkbox(label="Random Seed", value=True)
                    seed = gr.Slider(label="Seed", minimum=1, maximum=1111111111111111, step=1, value=rand_val)
                    tokens = gr.Slider(label="Max new tokens", value=6400, minimum=0, maximum=8000, step=64,
                                       interactive=True, visible=True, info="The maximum number of tokens")
            with gr.Column(scale=1):
                with gr.Group():
                    temp = gr.Slider(label="Temperature", step=0.01, minimum=0.01, maximum=1.0, value=0.9)
                    top_p = gr.Slider(label="Top-P", step=0.01, minimum=0.01, maximum=1.0, value=0.9)
                    rep_p = gr.Slider(label="Repetition Penalty", step=0.1, minimum=0.1, maximum=2.0, value=1.0)

    with gr.Group():
        with gr.Row():
            with gr.Column(scale=3):
                sys_inp = gr.Textbox(label="System Prompt (optional)")
                inp = gr.Textbox(label="Prompt")
                with gr.Row():
                    btn = gr.Button("Chat")
                    stop_btn = gr.Button("Stop")
                    clear_btn = gr.Button("Clear")

    chat_sub = inp.submit(check_rand, [rand, seed], seed).then(chat_inf,
                                                               [sys_inp, inp, chat_b, client_choice, seed, temp, tokens,
                                                                top_p, rep_p], chat_b)
    go = btn.click(check_rand, [rand, seed], seed).then(chat_inf,
                                                        [sys_inp, inp, chat_b, client_choice, seed, temp, tokens, top_p,
                                                         rep_p], chat_b)
    stop_btn.click(None, None, None, cancels=[go, chat_sub])
    clear_btn.click(clear_fn, None, [chat_b])
app.queue(default_concurrency_limit=10).launch()