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News topic discovery using LDA (Latent Dirichlet Allocation)

Intro

This is an experimental project to play with LDA topic discovery using a scraped version of CNN news.

Setup

Create a virtual environment and clone the repository.

mkvirtualenv news-topics
git clone https://github.com/mpuig/news-topics
cd news-topics

Install the pyLDAvis library using this fork.

git clone https://github.com/mpuig/pyLDAvis
cd pyLDAvis
python setup.py install
cd ..
rm -rf pyLDAvis

Install the other requirements, needed for the crawling process and also for the analysis one.

pip install -r requirements.txt

Optionally, at this point, you can launch the crawler.py script and get a recent version of the cnn site. It takes some time to generate a cnn.json file with the scraped news. If you want to move forward, you can use cnn0.json or cnn1.json, included with the project.

python crawler.py

Launch the jupyter notebook and start playing with the topic discovery.

jupyter notebook

Go to: http://localhost:8888/notebooks/cnn%20topics.ipynb