app.py

import streamlit as st
from transformers import BertTokenizer, TFBertForSequenceClassification
import tensorflow as tf
import numpy as np

import os
os.environ["PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION"] = "python"

# Paths to your models hosted on Hugging Face
basic_model_url = "https://huggingface.co/anshupatel4298/bert-chatbot-model/resolve/main/basic_chatbot_model.h5"
bert_model_name = "anshupatel4298/bert-chatbot-model/bert_model"

# Load Basic Model
basic_model = tf.keras.models.load_model(basic_model_url)

# Load BERT Model and Tokenizer
bert_model = TFBertForSequenceClassification.from_pretrained(bert_model_name)
bert_tokenizer = BertTokenizer.from_pretrained(bert_model_name)

# Set your MAX_SEQUENCE_LENGTH here
MAX_SEQUENCE_LENGTH = 100

# Streamlit UI
st.sidebar.title("Select Model")
model_choice = st.sidebar.selectbox("Choose a model:", ["Basic Model", "BERT Model"])

st.title("Chatbot Interface")

user_input = st.text_input("You:")
if st.button("Send"):
    if user_input:
        if model_choice == "Basic Model":
            # Preprocess input for basic model
            tokenized_input = tf.keras.preprocessing.text.Tokenizer().texts_to_sequences([user_input])
            input_data = tf.keras.preprocessing.sequence.pad_sequences(tokenized_input, maxlen=MAX_SEQUENCE_LENGTH)
            prediction = basic_model.predict(input_data)
            response = np.argmax(prediction, axis=-1)[0]
        else:
            # Preprocess input for BERT model
            inputs = bert_tokenizer(user_input, return_tensors="tf", max_length=MAX_SEQUENCE_LENGTH, truncation=True, padding="max_length")
            outputs = bert_model(**inputs)
            response = tf.argmax(outputs.logits, axis=-1).numpy()[0]

        st.write(f"Bot: {response}")