app.py

import os
from dotenv import load_dotenv
from scrapegraphai.graphs import SmartScraperGraph
from scrapegraphai.utils import prettify_exec_info
from langchain_community.llms import HuggingFaceEndpoint
from langchain_community.embeddings import HuggingFaceInferenceAPIEmbeddings
import gradio as gr
import subprocess

# Ensure Playwright installs required browsers and dependencies
subprocess.run(["playwright", "install"])
#subprocess.run(["playwright", "install-deps"])

# Load environment variables
load_dotenv()
HUGGINGFACEHUB_API_TOKEN = os.getenv('HUGGINGFACEHUB_API_TOKEN')

# Initialize the model instances
#repo_id = "mistralai/Mistral-7B-Instruct-v0.2"
repo_id = "Qwen/Qwen2.5-72B-Instruct"

llm_model_instance = HuggingFaceEndpoint(
    repo_id=repo_id, max_length=128, temperature=0.5, token=HUGGINGFACEHUB_API_TOKEN
)

embedder_model_instance = HuggingFaceInferenceAPIEmbeddings(
    api_key=HUGGINGFACEHUB_API_TOKEN, model_name="sentence-transformers/all-MiniLM-l6-v2"
)

graph_config = {
    "llm": {
        "model_instance": llm_model_instance,
        "model_tokens": 100000, 
    },
    "embeddings": {"model_instance": embedder_model_instance}
}

def scrape_and_summarize(prompt, source):
    smart_scraper_graph = SmartScraperGraph(
        prompt=prompt,
        source=source,
        config=graph_config
    )
    result = smart_scraper_graph.run()
    exec_info = smart_scraper_graph.get_execution_info()
    return result, prettify_exec_info(exec_info)

# Gradio interface
with gr.Blocks() as demo:
    gr.Markdown("# Scrape websites, no-code version")
    gr.Markdown("""Easily scrape and summarize web content using advanced AI models on the Hugging Face Hub without writing any code. Input your desired prompt and source URL to get started.
                This is a no-code version of the excellent lib [ScrapeGraphAI](https://github.com/VinciGit00/Scrapegraph-ai).
                It's a basic demo and a work in progress. Please contribute to it to make it more useful!""")

    with gr.Row():
        with gr.Column():
            
            model_dropdown = gr.Textbox(label="Model", value="Qwen/Qwen2.5-72B-Instruct")
            prompt_input = gr.Textbox(label="Prompt", value="List all the press releases with their headlines and urls.")
            source_input = gr.Textbox(label="Source URL", value="https://www.whitehouse.gov/")
            scrape_button = gr.Button("Scrape and Summarize")
        
        with gr.Column():
            result_output = gr.Textbox(label="Result")
            exec_info_output = gr.Textbox(label="Execution Info")

    scrape_button.click(
        scrape_and_summarize,
        inputs=[prompt_input, source_input],
        outputs=[result_output, exec_info_output]
    )

# Launch the Gradio app
if __name__ == "__main__":
    demo.launch()