Collaborative Filtering for Implicit Feedback Datasets

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Development Status
- 4 - Beta
Intended Audience
- Science/Research
License
- OSI Approved :: MIT License
Natural Language
- English
Operating System
- OS Independent
Programming Language
Topic
- Software Development :: Libraries :: Python Modules

Project description

Implicit

Fast Python Collaborative Filtering for Implicit Datasets.

This project provides fast Python implementations of several different popular recommendation algorithms for implicit feedback datasets:

Alternating Least Squares as described in the papers Collaborative Filtering for Implicit Feedback Datasets and Applications of the Conjugate Gradient Method for Implicit Feedback Collaborative Filtering.
Bayesian Personalized Ranking.
Logistic Matrix Factorization
Item-Item Nearest Neighbour models using Cosine, TFIDF or BM25 as a distance metric.

All models have multi-threaded training routines, using Cython and OpenMP to fit the models in parallel among all available CPU cores. In addition, the ALS and BPR models both have custom CUDA kernels - enabling fitting on compatible GPU's. Approximate nearest neighbours libraries such as Annoy, NMSLIB and Faiss can also be used by Implicit to speed up making recommendations.

Installation

Implicit can be installed from pypi with:

pip install implicit

Installing with pip will use prebuilt binary wheels on x86_64 Linux, Windows and OSX. These wheels include GPU support on Linux.

Implicit can also be installed with conda:

# CPU only package
conda install -c conda-forge implicit

# CPU+GPU package
conda install -c conda-forge implicit implicit-proc=*=gpu

Basic Usage

import implicit

# initialize a model
model = implicit.als.AlternatingLeastSquares(factors=50)

# train the model on a sparse matrix of user/item/confidence weights
model.fit(user_item_data)

# recommend items for a user
recommendations = model.recommend(userid, user_item_data[userid])

# find related items
related = model.similar_items(itemid)

The examples folder has a program showing how to use this to compute similar artists on the last.fm dataset.

For more information see the documentation.

Articles about Implicit

These blog posts describe the algorithms that power this library:

There are also several other articles about using Implicit to build recommendation systems:

Requirements

This library requires SciPy version 0.16 or later and Python version 3.6 or later.

GPU Support requires at least version 11 of the NVidia CUDA Toolkit.

This library is tested with Python 3.7, 3.8, 3.9, 3.10 and 3.11 on Ubuntu, OSX and Windows.

Benchmarks

Simple benchmarks comparing the ALS fitting time versus Spark can be found here.

Optimal Configuration

I'd recommend configuring SciPy to use Intel's MKL matrix libraries. One easy way of doing this is by installing the Anaconda Python distribution.

For systems using OpenBLAS, I highly recommend setting 'export OPENBLAS_NUM_THREADS=1'. This disables its internal multithreading ability, which leads to substantial speedups for this package. Likewise for Intel MKL, setting 'export MKL_NUM_THREADS=1' should also be set.

Released under the MIT License

Project details

These details have not been verified by PyPI

Project links

Homepage

Development Status
- 4 - Beta
Intended Audience
- Science/Research
License
- OSI Approved :: MIT License
Natural Language
- English
Operating System
- OS Independent
Programming Language
Topic
- Software Development :: Libraries :: Python Modules

Release history Release notifications | RSS feed

This version

0.7.2

Sep 29, 2023

0.7.1

Aug 25, 2023

0.7.0

Jun 13, 2023

0.6.2

Dec 11, 2022

0.6.1

Aug 31, 2022

0.6.0

Jul 11, 2022

0.5.2

Jan 29, 2022

0.5.1

Jan 28, 2022

0.5.0

Jan 28, 2022

0.4.8

Aug 29, 2021

0.4.7

Aug 29, 2021

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Aug 29, 2021

0.4.5

Aug 29, 2021

0.4.4

Sep 15, 2020

0.4.3

Sep 15, 2020

0.4.2

Oct 23, 2019

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0.1.1

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