app.py

import torch
import gradio as gr
from transformers import (
    AutoModelForSequenceClassification,
    AutoTokenizer,
)
from typing import Dict

FOUNDATIONS = ["authority", "care", "fairness", "loyalty", "sanctity"]
tokenizer = AutoTokenizer.from_pretrained("joshnguyen/mformer-authority")
DEVICE = torch.device("cuda" if torch.cuda.is_available() else "cpu")
MODELS = {}
for foundation in FOUNDATIONS:
    model = AutoModelForSequenceClassification.from_pretrained(
        pretrained_model_name_or_path=f"joshnguyen/mformer-{foundation}",
    )
    MODELS[foundation] = model.to(DEVICE)


def classify_text(text: str) -> Dict[str, float]:
    # Encode the prompt
    inputs = tokenizer([text],
                       padding=True,
                       truncation=True,
                       return_tensors='pt').to(DEVICE)
    scores = {}
    for foundation in FOUNDATIONS:
        model = MODELS[foundation]
        outputs = model(**inputs)
        outputs = torch.softmax(outputs.logits, dim=1)
        outputs = outputs[:, 1]
        score = outputs.detach().cpu().numpy()[0]
        scores[foundation] = score
    return scores


demo = gr.Interface(
    fn=classify_text,
    inputs=[
        # Prompt
        gr.Textbox(
            label="Input text",
            container=False,
            show_label=True,
            placeholder="Enter some text...",
            lines=10,
            scale=10,
        ),
    ],
    outputs=[
        gr.Label(
            label="Moral foundations scores",
            container=False,
            show_label=True,
            scale=10,
            lines=10,
        )
    ],
)

demo.queue(max_size=20).launch()