pilotbear / lightfm

A Python implementation of LightFM, a hybrid recommendation algorithm.

LightFM

Build status
Linux
OSX (OpenMP disabled)
Windows (OpenMP disabled)

LightFM is a Python implementation of a number of popular recommendation algorithms for both implicit and explicit feedback. It's easy to use, fast (via multithreaded model estimation), and produces high quality results.

It also makes it possible to incorporate both item and user metadata into the traditional matrix factorization algorithms It represents each user and item as the sum of the latent representations of their features, thus allowing recommendations to generalise to new items (via item features) and to new users (via user features).

For more details, see the Documentation.

Articles and tutorials on using LightFM

1. Learning to Rank Sketchfab Models with LightFM
2. Metadata Embeddings for User and Item Cold-start Recommendations
3. Recommendation Systems - Learn Python for Data Science

How to cite

Please cite LightFM if it helps your research. You can use the following BibTeX entry:

@inproceedings{DBLP:conf/recsys/Kula15,
  author    = {Maciej Kula},
  editor    = {Toine Bogers and
               Marijn Koolen},
  title     = {Metadata Embeddings for User and Item Cold-start Recommendations},
  booktitle = {Proceedings of the 2nd Workshop on New Trends on Content-Based Recommender
               Systems co-located with 9th {ACM} Conference on Recommender Systems
               (RecSys 2015), Vienna, Austria, September 16-20, 2015.},
  series    = {{CEUR} Workshop Proceedings},
  volume    = {1448},
  pages     = {14--21},
  publisher = {CEUR-WS.org},
  year      = {2015},
  url       = {http://ceur-ws.org/Vol-1448/paper4.pdf},
}

Development

Pull requests are welcome. To install for development:

1. Clone the repository: git clone [e-mail]:lyst/lightfm.git
2. Install it for development using pip: cd lightfm && pip install -e .
3. You can run tests by running python setup.py test.

When making changes to the .pyx extension files, you'll need to run python setup.py cythonize in order to produce the extension .c files before running pip install -e ..