gensim.matutils.kullback_leibler(vec1, vec2, num_features=None)[source]

A distance metric between two probability distributions. Returns a distance value in range <0,1> where values closer to 0 mean less distance (and a higher similarity) Uses the scipy.stats.entropy method to identify kullback_leibler convergence value. If the distribution draws from a certain number of docs, that value must be passed.