app.py

import spaces
import torch
import torch.nn.functional as F
from torch import Tensor
from transformers import AutoTokenizer, AutoModel
import gradio as gr
import os

title = """
# 👋🏻Welcome to 🙋🏻‍♂️Tonic's 🐣e5-mistral🛌🏻Embeddings """
description = """
You can use this Space to test out the current model [intfloat/e5-mistral-7b-instruct](https://huggingface.co/intfloat/e5-mistral-7b-instruct). e5mistral has a larger context window, a different prompting/return mechanism and generally better results than other embedding models. 
You can also use 🐣e5-mistral🛌🏻 by cloning this space. 🧬🔬🔍 Simply click here: <a style="display:inline-block" href="https://huggingface.co/spaces/Tonic/e5?duplicate=true"><img src="https://img.shields.io/badge/-Duplicate%20Space-blue?labelColor=white&style=flat&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAAXNSR0IArs4c6QAAAP5JREFUOE+lk7FqAkEURY+ltunEgFXS2sZGIbXfEPdLlnxJyDdYB62sbbUKpLbVNhyYFzbrrA74YJlh9r079973psed0cvUD4A+4HoCjsA85X0Dfn/RBLBgBDxnQPfAEJgBY+A9gALA4tcbamSzS4xq4FOQAJgCDwV2CPKV8tZAJcAjMMkUe1vX+U+SMhfAJEHasQIWmXNN3abzDwHUrgcRGmYcgKe0bxrblHEB4E/pndMazNpSZGcsZdBlYJcEL9Afo75molJyM2FxmPgmgPqlWNLGfwZGG6UiyEvLzHYDmoPkDDiNm9JR9uboiONcBXrpY1qmgs21x1QwyZcpvxt9NS09PlsPAAAAAElFTkSuQmCC&logoWidth=14" alt="Duplicate Space"></a></h3> 
Join us : 🌟TeamTonic🌟 is always making cool demos! Join our active builder's🛠️community 👻  [![Join us on Discord](https://img.shields.io/discord/1109943800132010065?label=Discord&logo=discord&style=flat-square)](https://discord.gg/GWpVpekp) On 🤗Huggingface: [TeamTonic](https://huggingface.co/TeamTonic) & [MultiTransformer](https://huggingface.co/MultiTransformer) On 🌐Github: [Polytonic](https://github.com/tonic-ai) & contribute to 🌟 [Poly](https://github.com/tonic-ai/poly) 🤗Big thanks to Yuvi Sharma and all the folks at huggingface for the community grant 🤗

You can use this space in **two ways !** either select an embeddings mode or 'None' to speak with the e5mistral LLM 🤗
"""

os.environ['PYTORCH_CUDA_ALLOC_CONF'] = 'max_split_size_mb:30'
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")

tasks = {
        'ArguAna': 'Given a claim, find documents that refute the claim',
        'ClimateFEVER': 'Given a claim about climate change, retrieve documents that support or refute the claim',
        'DBPedia': 'Given a query, retrieve relevant entity descriptions from DBPedia',
        'FEVER': 'Given a claim, retrieve documents that support or refute the claim',
        'FiQA2018': 'Given a financial question, retrieve user replies that best answer the question',
        'HotpotQA': 'Given a multi-hop question, retrieve documents that can help answer the question',
        'MSMARCO': 'Given a web search query, retrieve relevant passages that answer the query',
        'NFCorpus': 'Given a question, retrieve relevant documents that best answer the question',
        'NQ': 'Given a question, retrieve Wikipedia passages that answer the question',
        'QuoraRetrieval': 'Given a question, retrieve questions that are semantically equivalent to the given question',
        'SCIDOCS': 'Given a scientific paper title, retrieve paper abstracts that are cited by the given paper',
        'SciFact': 'Given a scientific claim, retrieve documents that support or refute the claim',
        'Touche2020': 'Given a question, retrieve detailed and persuasive arguments that answer the question',
        'TRECCOVID': 'Given a query on COVID-19, retrieve documents that answer the query',
}

tokenizer = AutoTokenizer.from_pretrained('intfloat/e5-mistral-7b-instruct')
model = AutoModel.from_pretrained('intfloat/e5-mistral-7b-instruct', torch_dtype=torch.float16, device_map=device)

def last_token_pool(last_hidden_states: Tensor, attention_mask: Tensor) -> Tensor:
    left_padding = (attention_mask[:, -1].sum() == attention_mask.shape[0])
    if left_padding:
        return last_hidden_states[:, -1]
    else:
        sequence_lengths = attention_mask.sum(dim=1) - 1
        batch_size = last_hidden_states.shape[0]
        return last_hidden_states[torch.arange(batch_size, device=last_hidden_states.device), sequence_lengths]

@spaces.GPU
def compute_embeddings(selected_task, input_text, system_prompt):
    max_length = 2042
    if selected_task == "None":
        if system_prompt:
            processed_texts = [f'Instruct: {system_prompt}\nQuery: {input_text}']
        else:
            processed_texts = [f'Query: {input_text}']
    else:
        task_description = tasks[selected_task]
        processed_texts = [f'Instruct: {task_description}\nQuery: {input_text}']


    batch_dict = tokenizer(processed_texts, max_length=max_length - 1, return_attention_mask=False, padding=False, truncation=True)
    batch_dict['input_ids'] = [input_ids + [tokenizer.eos_token_id] for input_ids in batch_dict['input_ids']]
    batch_dict = tokenizer.pad(batch_dict, padding=True, return_attention_mask=True, return_tensors='pt')
    batch_dict = {k: v.to(device) for k, v in batch_dict.items()}
    outputs = model(**batch_dict)
    embeddings = last_token_pool(outputs.last_hidden_state, batch_dict['attention_mask'])
    embeddings = F.normalize(embeddings, p=2, dim=1)
    embeddings_list = embeddings.detach().cpu().numpy().tolist()
    return embeddings_list
    
def app_interface():
    with gr.Blocks() as demo:
        gr.Markdown(title)
        gr.Markdown(description)

        task_dropdown = gr.Dropdown(list(tasks.keys()) + ["None"], label="Select a Task (Optional)", value="None")
        
        input_text_box = gr.Textbox(label="📖Input Text")
        system_prompt_box = gr.Textbox(label="🤖System Prompt (Optional)")
        
        compute_button = gr.Button("Try🐣🛌🏻e5")
        
        output_display = gr.Textbox(label="🐣e5-mistral🛌🏻")
        
        with gr.Row():
            with gr.Column():
                system_prompt_box
                input_text_box
            with gr.Column():
                compute_button
                output_display

        compute_button.click(
            fn=compute_embeddings,
            inputs=[task_dropdown, input_text_box, system_prompt_box], 
            outputs=output_display
        )

    return demo

app_interface().launch()