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import nltk
import streamlit as st
import validators
from transformers import pipeline
from validators import ValidationFailure
from Summarizer import Summarizer
def main() -> None:
nltk.download('punkt')
st.markdown('# Terms & conditions summarization :pencil:')
st.markdown('Do you also take the time out of your day to thoroughly read every word of the Terms & Conditions before signing up for a new app? :thinking_face:<br>'
'No?<br>'
'Well have we got a demo for you!', unsafe_allow_html=True)
st.markdown('Just copy-paste the lengthy Terms & Conditions text or provide a URL to the text and let our fancy NLP algorithm do the rest! :brain:<br>'
'You will see both an extractive summary (the most important sentences will be highlighted) and an abstractive summary (an actual summary)', unsafe_allow_html=True)
st.markdown('Want to find out more?<br>'
'For details about the extractive part :point_right: https://en.wikipedia.org/wiki/Latent_semantic_analysis<br>'
'For details about the abstractive part :point_right: https://huggingface.co/ml6team/distilbart-tos-summarizer-tosdr', unsafe_allow_html=True)
@st.cache(allow_output_mutation=True,
suppress_st_warning=True,
show_spinner=False)
def create_pipeline():
with st.spinner('Please wait for the model to load...'):
terms_and_conditions_pipeline = pipeline(
task='summarization',
model='ml6team/distilbart-tos-summarizer-tosdr',
tokenizer='ml6team/distilbart-tos-summarizer-tosdr'
)
return terms_and_conditions_pipeline
def display_abstractive_summary(summary) -> None:
st.subheader("Abstractive Summary")
st.markdown('#####')
st.markdown(summary)
def display_extractive_summary(terms_and_conditions_sentences: list, summary_sentences: list) -> None:
st.subheader("Extractive Summary")
st.markdown('#####')
terms_and_conditions = " ".join(sentence for sentence in terms_and_conditions_sentences)
replaced_text = terms_and_conditions
for sentence in summary_sentences:
replaced_text = replaced_text.replace(sentence,
f"<span style='background-color: #FFFF00'>{sentence}</span>")
st.write(replaced_text, unsafe_allow_html=True)
def is_valid_url(url: str) -> bool:
result = validators.url(url)
if isinstance(result, ValidationFailure):
return False
return True
summarizer: Summarizer = Summarizer(create_pipeline())
if 'tc_text' not in st.session_state:
st.session_state['tc_text'] = ''
if 'sentences_length' not in st.session_state:
st.session_state['sentences_length'] = Summarizer.DEFAULT_EXTRACTED_ARTICLE_SENTENCES_LENGTH
st.write('<style>div.row-widget.stRadio > div{flex-direction:row;}</style>', unsafe_allow_html=True)
st.header("Input")
with st.form(key='terms-and-conditions'):
sentences_length_input = st.number_input(
label='Number of sentences to be extracted:',
min_value=1,
value=st.session_state.sentences_length
)
tc_text_input = st.text_area(
value=st.session_state.tc_text,
label='Terms & conditions content or specify an URL:',
height=240
)
submit_button = st.form_submit_button(label='Summarize')
if submit_button:
if is_valid_url(tc_text_input):
(all_sentences, extract_summary_sentences) = summarizer.extractive_summary_from_url(tc_text_input,
sentences_length_input)
else:
(all_sentences, extract_summary_sentences) = summarizer.extractive_summary_from_text(tc_text_input,
sentences_length_input)
extract_summary = " ".join([sentence for sentence in extract_summary_sentences])
abstract_summary = summarizer.abstractive_summary(extract_summary)
display_extractive_summary(all_sentences, extract_summary_sentences)
display_abstractive_summary(abstract_summary)
if __name__ == "__main__":
main()