app.py

import streamlit as st
import pandas as pd
import bertopic
import plotly.express as px

st.set_page_config(page_title="Topic Modeling with Bertopic")

from datasets import load_dataset

st.markdown("""
https://github.com/pinecone-io/examples/tree/master/learn/algos-and-libraries/bertopic
""")

data = load_dataset('jamescalam/python-reddit')
data = data.filter(
    lambda x: True if len(x['selftext']) > 30 else 0
)
from bertopic import BERTopic
from sklearn.feature_extraction.text import CountVectorizer

# we add this to remove stopwords
vectorizer_model = CountVectorizer(ngram_range=(1, 2), stop_words="english")

model = BERTopic(
    vectorizer_model=vectorizer_model,
    language='english', calculate_probabilities=True,
    verbose=True
)
topics, probs = model.fit_transform(text)
freq = model.get_topic_info()
freq.head(10)


from sentence_transformers import SentenceTransformer

model = SentenceTransformer('all-MiniLM-L6-v2')
model

import numpy as np
from tqdm.auto import tqdm

batch_size = 16

embeds = np.zeros((n, model.get_sentence_embedding_dimension()))

for i in tqdm(range(0, n, batch_size)):
    i_end = min(i+batch_size, n)
    batch = data['selftext'][i:i_end]
    batch_embed = model.encode(batch)
    embeds[i:i_end,:] = batch_embed