Function recoreco::io::csv_reader

pub fn csv_reader(file: &str) -> Result<Reader<File>, Error>

Reads a CSV input file. We expect NO headers, and a user-item pair per line with tab separation, which denotes an interaction between a user and this item, e.g.,

alice	apple
alice	dog
alice	pony
bob	apple
bob	pony
charles	pony
charles	bike