app.py

import torch
import streamlit as st
from transformers import AutoTokenizer, AutoModelForSequenceClassification
import plotly.graph_objects as go

input_text = st.text_input(
    label='Estimate item desirability:',
    value='I love a good fight.',
    placeholder='Enter item'

)

#model_path = '/nlp/nlp/models/finetuned/twitter-xlm-roberta-base-regressive-desirability-ft-4'
model_path = 'magnolia-psychometrics/item-desirability'

tokenizer = AutoTokenizer.from_pretrained(
    pretrained_model_name_or_path=model_path,
    use_fast=True
)

model = AutoModelForSequenceClassification.from_pretrained(
    pretrained_model_name_or_path=model_path, 
    num_labels=1, 
    ignore_mismatched_sizes=True,
)

def z_score(y, mean=.04853076, sd=.9409466):
    return (y - mean) / sd

if input_text:    
    
    inputs = tokenizer(input_text, padding=True, return_tensors='pt')

    with torch.no_grad():
        score = model(**inputs).logits.squeeze().tolist()
        z = z_score(score)

    fig = go.Figure(go.Indicator(
        mode = "gauge+delta",
        value = z,
        domain = {'x': [0, 1], 'y': [0, 1]},
        title = f"Item Desirability <br><sup>\"{input_text}\"</sup>",
        delta = {
            'reference': 0, 
            'decreasing': {'color': "#ec4899"},
            'increasing': {'color': "#36def1"}
            },
        gauge = {
            'axis': {'range': [-4, 4], 'tickwidth': 1, 'tickcolor': "black"},
            'bar': {'color': "#4361ee"},
            'bgcolor': "white",
            'borderwidth': 2,
            'bordercolor': "#efefef",
            'steps': [
                {'range': [-4, 0], 'color': '#efefef'},
                {'range': [0, 4], 'color': '#efefef'}],
            'threshold': {
                'line': {'color': "#4361ee", 'width': 8},
                'thickness': 0.75,
                'value': z}
            }))

    fig.update_layout(
        paper_bgcolor = "white", 
        font = {'color': "black", 'family': "Arial"})
        
    st.plotly_chart(fig, theme=None, use_container_width=True)