app.py

import streamlit as st
from transformers import AutoTokenizer, AutoModelForSequenceClassification
import os
import torch

from cleantext import clean
import hazm
import re

def cleanhtml(raw_html):
    cleanr = re.compile('<.*?>')
    cleantext = re.sub(cleanr, '', raw_html)
    return cleantext


def cleaning(text):
    text = text.strip()

    # regular cleaning
    text = clean(text,
                 clean_all=True,
                 punct=True,
                 stopwords=True,
                 stemming=True,
                 extra_spaces=True
                 )

    # cleaning htmls
    text = cleanhtml(text)

    # normalizing
    normalizer = hazm.Normalizer()
    text = normalizer.normalize(text)

    # removing wierd patterns
    wierd_pattern = re.compile("["
                               u"\U0001F600-\U0001F64F"  # emoticons
                               u"\U0001F300-\U0001F5FF"  # symbols & pictographs
                               u"\U0001F680-\U0001F6FF"  # transport & map symbols
                               u"\U0001F1E0-\U0001F1FF"  # flags (iOS)
                               u"\U00002702-\U000027B0"
                               u"\U000024C2-\U0001F251"
                               u"\U0001f926-\U0001f937"
                               u'\U00010000-\U0010ffff'
                               u"\u200d"
                               u"\u2640-\u2642"
                               u"\u2600-\u2B55"
                               u"\u23cf"
                               u"\u23e9"
                               u"\u231a"
                               u"\u3030"
                               u"\ufe0f"
                               u"\u2069"
                               u"\u2066"
                               # u"\u200c"
                               u"\u2068"
                               u"\u2067"
                               "]+", flags=re.UNICODE)

    text = wierd_pattern.sub(r'', text)

    # removing extra spaces, hashtags
    text = re.sub("#", "", text)
    text = re.sub("\s+", " ", text)

    return text

tokenizer = AutoTokenizer.from_pretrained("HamidRezaei/Persian-Offensive-Language-Detection-Lora")
model = AutoModelForSequenceClassification.from_pretrained("HamidRezaei/Persian-Offensive-Language-Detection-Lora")

st.title("Offensive or Not?")
prompt = st.text_area(label="Send a message")
button = st.button("send")

if prompt:
    normalized_prompt = cleaning(prompt)
    
    encoding = tokenizer(normalized_prompt, return_tensors="pt")
    encoding = {k: v.to(model.device) for k,v in encoding.items()}
    
    outputs = model(**encoding)
    logits = outputs.logits
    
    # apply sigmoid + threshold
    sigmoid = torch.nn.Sigmoid()
    probs = sigmoid(logits.squeeze().cpu())
    score = probs.item()
    st.markdown(f"Offensive: score {score}" if score > 0.5 else f"Not Offensive: score {score}")