Diversified Sampling: Mining Large Datasets for Special Cases — TL;DR: the objective is to build a small sample of the data in which special cases are likely to be represented. The strategy is to have each data item emit a list of “features,” and to boost the probability of selecting rare features. A shallow understanding of the data is often enough to design an effective features extraction.
RLCard — open source reinforcement learning toolkit for card games. Paper. (via SyncedReview)
usql — Universal command-line interface for SQL databases.