app.py

#x = st.slider('Select a value')
#st.write(x, 'squared is', x * x)

import streamlit as st
from transformers import pipeline
import ast

# Load the summarization model
#summarizer = pipeline("summarization", model="sshleifer/distilbart-cnn-12-6")  # smaller version of the model
summarizer = pipeline("summarization", model="facebook/bart-large-cnn")

# Default article text
DEFAULT_ARTICLE = """ New York (CNN)When Liana Barrientos was 23 years old, she got married in Westchester County, New York.
A year later, she got married again in Westchester County, but to a different man and without divorcing her first husband.
Only 18 days after that marriage, she got hitched yet again. Then, Barrientos declared "I do" five more times, sometimes only within two weeks of each other.
In 2010, she married once more, this time in the Bronx. In an application for a marriage license, she stated it was her "first and only" marriage.
Barrientos, now 39, is facing two criminal counts of "offering a false instrument for filing in the first degree," referring to her false statements on the
2010 marriage license application, according to court documents.
"""

# Create a text area for user input
ARTICLE = st.sidebar.text_area('Enter Article', DEFAULT_ARTICLE, height=150)

# Define the summarization function
def summarize(txt):
    st.write('\n\n')
    st.write(txt[:100])  # Display the first 100 characters of the article
    st.write('--------------------------------------------------------------')
    summary = summarizer(txt, max_length=130, min_length=30, do_sample=False)
    st.write(summary[0]['summary_text'])

# Create a button and trigger the summarize function when clicked
if st.sidebar.button('Summarize Article'):
    summarize(ARTICLE)
else:
    st.warning('👈 Please enter Article!')



#################################


# Initialize the sentiment analysis pipeline
# No model was supplied, defaulted to distilbert-base-uncased-finetuned-sst-2-english
sentiment_pipeline = pipeline("sentiment-analysis")

# Default article text
DEFAULT_SENTIMENT = """[
    "I'm so happy today!",
    "This is the worst experience ever.",
    "It's a decent product, nothing special."
]"""

DEFAULT_SENTIMENT = "I'm so happy today!"
# Create a text area for user input
SENTIMENT = st.sidebar.text_area('Enter Sentiment', DEFAULT_SENTIMENT, height=150)

def is_valid_list_string(string):
    try:
        result = ast.literal_eval(string)
        return isinstance(result, list)
    except (ValueError, SyntaxError):
        return False
        
# Define the summarization function
def summarize(txt):
    
    st.write('\n\n')
    #st.write(txt[:100])  # Display the first 100 characters of the article
    st.write('--------------------------------------------------------------')
    
    # Display the results
    #if type(txt_converted) == 'list':
    #if isinstance(txt_converted, list):
    if is_valid_list_string(txt):        
        txt_converted = ast.literal_eval(txt) #convert string to actual content, e.g. list
        # Perform Hugging sentiment analysis on multiple texts
        results = sentiment_pipeline(txt_converted)        
        for i, text in enumerate(txt_converted):
            st.write(f"Text: {text}")
            st.write(f"Sentiment: {results[i]['label']}, Score: {results[i]['score']:.2f}\n")
    else:
        # Perform Hugging sentiment analysis on multiple texts
        results = sentiment_pipeline(txt)        
        st.write(f"Text: {txt}")
        st.write(f"Sentiment: {results[0]['label']}, Score: {results[0]['score']:.2f}\n")

# Create a button and trigger the summarize function when clicked
if st.sidebar.button('Summarize Sentiment'):
    #ast.literal_eval() is a function in Python that safely evaluates a string containing a valid Python expression, 
    #such as lists, dictionaries, tuples, sets, integers, and floats. It parses the string and returns the corresponding 
    #Python object, without executing any arbitrary code, which makes it safer than using eval().    
    #summarize(str(SENTIMENT)) #explicitly change SENTIMENT to string so that even when ypu provide unquoted string, it still works
    summarize(SENTIMENT)  # Directly pass the SENTIMENT
else:
    st.warning('👈 Please enter Sentiment!')