DREAM

This repository contains my implementations of DREAM for next basket prediction. Besides I extendted the DREAM Framework to reorder prediction scenario. And it helped me earn 39/2669 place in Kaggle Instacart Reorder Prediction Competition. For anyone who is interested, please check this page for details about the Instacart competition.

Model

DREAM uses RNN to capture sequential information of users' shopping behavior. It extracts users' dynamic representations and scores user-item pair by calculating inner products between users' dynamic representations and items' embedding.

Refer to the following paper:

Yu, Feng, et al. "A dynamic recurrent model for next basket recommendation." Proceedings of the 39th International ACM SIGIR conference on Research and Development in Information Retrieval. ACM, 2016.

for details about DREAM.

Dataset

It runs on the Instacart dataset and can be used in other e-commerce datasets by modifying the input easily.

Files

dream.py

• definition of DREAM

train.py

• implementation of bpr loss function
• implemeantation of reorder bpr loss function
• training of DREAM

eval.py

• calculate <u,p> score using DREAM

data.py

• input wrapper for DREAM
• based on the Instacart Dataset

utils.py

• some useful functions

config.py

• DREAM configurations

constants.py

• some constants such as file path

Make Recommendation Using DREAM.ipynb

• using trained DREAM model to generate predictors for <u,p>

Requirements

• tensorboard
• tensorboardX
• pytorch == 0.3
• pandas == 0.19.2
• scikit-learn == 0.18.1

You need GPU to accelerate training.

License

Copyright (c) 2018 Yihong Chen