app.py
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"""
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Credit to Derek Thomas, derek@huggingface.co
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"""
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import os
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import logging
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from pathlib import Path
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from time import perf_counter
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import gradio as gr
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from jinja2 import Environment, FileSystemLoader
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from backend.query_llm import generate_hf, generate_openai
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from backend.semantic_search import retrieve
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TOP_K = int(os.getenv("TOP_K", 4))
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proj_dir = Path(__file__).parent
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# Setting up the logging
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger(__name__)
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# Set up the template environment with the templates directory
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env = Environment(loader=FileSystemLoader(proj_dir / 'templates'))
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# Load the templates directly from the environment
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template = env.get_template('template.j2')
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template_html = env.get_template('template_html.j2')
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def add_text(history, text):
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history = [] if history is None else history
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history = history + [(text, None)]
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return history, gr.Textbox(value="", interactive=False)
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def bot(history, api_kind):
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query = history[-1][0]
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if not query:
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raise gr.Warning("Please submit a non-empty string as a prompt")
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logger.info('Retrieving documents...')
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# Retrieve documents relevant to query
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document_start = perf_counter()
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documents = retrieve(query, TOP_K)
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document_time = perf_counter() - document_start
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logger.info(f'Finished Retrieving documents in {round(document_time, 2)} seconds...')
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# Create Prompt
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prompt = template.render(documents=documents, query=query)
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prompt_html = template_html.render(documents=documents, query=query)
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if api_kind == "HuggingFace":
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generate_fn = generate_hf
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elif api_kind == "OpenAI":
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generate_fn = generate_openai
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else:
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raise gr.Error(f"API {api_kind} is not supported")
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history[-1][1] = ""
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for character in generate_fn(prompt, history[:-1]):
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history[-1][1] = character
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yield history, prompt_html
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with gr.Blocks() as demo:
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chatbot = gr.Chatbot(
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[],
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elem_id="chatbot",
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avatar_images=('https://aui.atlassian.com/aui/8.8/docs/images/avatar-person.svg',
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'https://huggingface.co/datasets/huggingface/brand-assets/resolve/main/hf-logo.svg'),
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bubble_full_width=False,
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show_copy_button=True,
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show_share_button=True,
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)
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with gr.Row():
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txt = gr.Textbox(
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scale=3,
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show_label=False,
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placeholder="Enter text and press enter",
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container=False,
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)
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txt_btn = gr.Button(value="Submit text", scale=1)
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api_kind = gr.Radio(choices=["HuggingFace", "OpenAI"], value="HuggingFace")
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prompt_html = gr.HTML()
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# Turn off interactivity while generating if you click
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txt_msg = txt_btn.click(add_text, [chatbot, txt], [chatbot, txt], queue=False).then(
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bot, [chatbot, api_kind], [chatbot, prompt_html])
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# Turn it back on
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txt_msg.then(lambda: gr.Textbox(interactive=True), None, [txt], queue=False)
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# Turn off interactivity while generating if you hit enter
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txt_msg = txt.submit(add_text, [chatbot, txt], [chatbot, txt], queue=False).then(
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bot, [chatbot, api_kind], [chatbot, prompt_html])
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# Turn it back on
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txt_msg.then(lambda: gr.Textbox(interactive=True), None, [txt], queue=False)
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demo.queue()
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demo.launch(debug=True)
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