|
import torch |
|
from transformers import DistilBertTokenizerFast, DistilBertForQuestionAnswering |
|
import json |
|
import streamlit as st |
|
|
|
model_name = "distilbert-base-cased" |
|
tokenizer = DistilBertTokenizerFast.from_pretrained(model_name) |
|
model = DistilBertForQuestionAnswering.from_pretrained(model_name) |
|
|
|
def format_response(start_index, end_index, raw_answer): |
|
answer_tokens = tokenizer.convert_tokens_to_string([tokenizer.convert_ids_to_tokens(i)[0] for i in range(start_index, end_index+1)]) |
|
return {'answer': answer_tokens.strip(), 'score': None} |
|
|
|
def get_answers(question, context): |
|
inputs = tokenizer.encode_plus(question, context, return_tensors="pt") |
|
start_scores, end_scores = model(**inputs).values() |
|
start_index = torch.argmax(start_scores) |
|
end_index = torch.argmax(end_scores) + 1 |
|
formatted_answer = format_response(start_index, end_index - 1, context[start_index:end_index].tolist()) |
|
return formatted_answer |
|
|
|
def update_displayed_query(query): |
|
st.session_state['current_query'] = query |
|
|
|
def interactive(): |
|
print("Hi! I am a simple AI chatbot built using Hugging Face and Streamlit.") |
|
query = "" |
|
while query != "quit": |
|
if 'current_query' not in st.session_state or st.session_state['current_query'] != query: |
|
st.session_state['current_query'] = query |
|
st.text_input("Ask me something or type 'quit' to exit:", "", key='my_input', on_change=update_displayed_query) |
|
|
|
if 'shown_query' not in st.session_state or st.session_state['shown_query'] != query: |
|
st.session_state['shown_query'] = query |
|
if len(query) > 0 and query != 'quit': |
|
try: |
|
context = "The capital of France is Paris." |
|
response = get_answers(query, context) |
|
st.write(json.dumps(response)) |
|
except Exception as e: |
|
st.write(f"Error occurred: {str(e)}") |
|
|
|
if __name__ == "__main__": |
|
st.set_page_config(layout="wide") |
|
st.title('AI Chatbot Built Using Hugging Face and Streamlit') |
|
st.subheader('Welcome to Our Intelligent Conversational Agent!') |
|
st.write('Please enter your question below or type "quit" to close the session.') |
|
interactive() |