app.py

import os
import gradio as gr
from http import HTTPStatus
import dashscope
from transformers import pipeline
from typing import List, Optional, Tuple, Dict
from urllib.error import HTTPError

default_system = 'You are a helpful assistant.'

History = List[Tuple[str, str]]
Messages = List[Dict[str, str]]

def clear_session() -> History:
    return '', []

def modify_system_session(system: str) -> str:
    if system is None or len(system) == 0:
        system = default_system
    return system, system, []

def history_to_messages(history: History, system: str) -> Messages:
    messages = [{'role': Role.SYSTEM, 'content': system}]
    for h in history:
        messages.append({'role': Role.USER, 'content': h[0]})
        messages.append({'role': Role.ASSISTANT, 'content': h[1]})
    return messages

def messages_to_history(messages: Messages) -> Tuple[str, History]:
    assert messages[0]['role'] == Role.SYSTEM
    system = messages[0]['content']
    history = []
    for q, r in zip(messages[1::2], messages[2::2]):
        history.append([q['content'], r['content']])
    return system, history

def model_chat(query: Optional[str], history: Optional[History], system: str
) -> Tuple[str, str, History]:
    if query is None:
        query = ''
    if history is None:
        history = []
    messages = history_to_messages(history, system)
    messages.append({'role': Role.USER, 'content': query})
    
    generator = pipeline('text-generation', model='microsoft/Phi-3-mini-128k-instruct')
    response = generator(query, max_length=150)  # Ajusta la longitud máxima según necesidad
    
    role = Role.ASSISTANT
    response_content = response[0]['generated_text']
    system, history = messages_to_history(messages + [{'role': role, 'content': response_content}])
    return '', history, system

with gr.Blocks() as demo:
    with gr.TabBar():
        with gr.Tab("Model Info"):
            gr.Markdown("""Modelo actual: `microsoft/Phi-3-mini-128k-instruct`""")
        
        with gr.Tab("Chat"):
            gr.Markdown("""<center><font size=8>Chat Bot Preview👾</center>""")

            with gr.Row():
                with gr.Column(scale=3):
                    system_input = gr.Textbox(value=default_system, lines=1, label='System')
                with gr.Column(scale=1):
                    modify_system = gr.Button("🛠️ Set system prompt and clear history", scale=2)
                system_state = gr.Textbox(value=default_system, visible=False)
            chatbot = gr.Chatbot(label='Chat with AI')
            textbox = gr.Textbox(lines=2, label='Input')

            with gr.Row():
                clear_history = gr.Button("🧹 Clear history")
                submit = gr.Button("🚀 Send")

            submit.click(model_chat,
                         inputs=[textbox, chatbot, system_state],
                         outputs=[textbox, chatbot, system_input],
                         concurrency_limit=100)
            clear_history.click(fn=clear_session,
                                inputs=[],
                                outputs=[textbox, chatbot])
            modify_system.click(fn=modify_system_session,
                                inputs=[system_input],
                                outputs=[system_state, system_input, chatbot])

demo.queue(api_open=False)
demo.launch(max_threads=30)