This is the source code used for experiments for the paper published in RecSys '19:
"Enhancing VAEs for Collaborative Filtering: Flexible Priors & Gating Mechanisms"
(arxiv preprint: https://arxiv.org/abs/1911.00936, ACM DL: https://dl.acm.org/citation.cfm?id=3347015)

An example of training a hierarchical VampPrior VAE for Collaborative Filtering on the Netflix dataset is as follows: python experiment.py --dataset_name="netflix" --max_beta=0.3 --model_name="hvamp" --gated --input_type="binary" --z1_size=200 --z2_size=200 --hidden_size=600 --num_layers=2 --note="Netflix(H+Vamp+Gate)"

Requirements are listed in requirements.txt

Datasets should be downloaded and preprocessed according to instructions in ./datasets/

Many of our code is reformulated based on https://github.com/dawenl/vae_cf and https://github.com/jmtomczak/vae_vampprior