This is implementation Discrete-Collaborative-Filtering in python refered as below links.
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Implementation DCF in matlab https://github.com/hanwangzhang/Discrete-Collaborative-Filtering
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Original paper Hanwang Zhang, Fumin Shen, Wei Liu, Xiangnan He, Huanbo Luan, Tat-Seng Chua. "Dicrete Collaborative Filtering". SIGIR 2016