app.py

import streamlit as st
import plotly.express as px
import torch

from torch import nn
from transformers import AutoTokenizer, AutoModelForSequenceClassification

deftxt = "I hate you cancerous insects so much"
txt = st.text_area('Text to analyze', deftxt)

# load tokenizer and model weights
tokenizer = AutoTokenizer.from_pretrained("s-nlp/roberta_toxicity_classifier")
model = AutoModelForSequenceClassification.from_pretrained("s-nlp/roberta_toxicity_classifier")
batch = tokenizer.encode(txt, return_tensors='pt')

# run model e.g. "logits": tensor([[ 4.8982, -5.1952]], grad_fn=<AddmmBackward0>)
result = model(batch)

# get probabilities e.g. tensor([[9.9996e-01, 4.2627e-05]], grad_fn=<SoftmaxBackward0>)
# first indice is neutral, second is toxic
prediction = nn.functional.softmax(result.logits, dim=-1)

neutralProb = round(prediction[0][0], 4)
toxicProb = round(prediction[0][1], 4)

print("Classification Probabilities")
print(f"Neutral: {neutralProb}")
print(f"Toxic: {toxicProb}")